The proposed program will address the critical needs of x-ray/uv wavelength mirror technology by proposing a new fabrication technique. called ion enhanced molecular beam deposition, this technique is capable of forming high reflectivity optical elements by vacuum depositing artificially structured… More

As an alternative to mercury-cadmium telluride (mct), we propose to investigate the optical properties of a recently invented class of type ii strained-layer superlattices made of (ga, as)related compounds. the new concept has advantages compared with previous efforts in that small band-gaps may be… More

We propose an automated molecular beam epitaxy (mbe) process for reproductable growth of semiconductor device structures. we will apply rheed and thermal oscillation techniques to control the rate andcomposition of the layers and to ensure that the growth proceeds underoptimum conditions. a mass… More

This project will investigate the optical properties of a recently invented class of type-ii, strained-layer superlattices made of gaas related compounds. the new concept has advantages, compared with previous efforts, in that small band gaps may be achieved with sufficiently thin repeating layers… More

An effective method for reducing flux transients in molecular beam epitaxy (mbe) effusion cell source is proposed. mbe is a useful technique for fabricating many important electronic and optoelectronic devices whose performance depends critically on reproducible material structures. tight control of… More

As an alternative to mercury-cadmium telluride (mct), we propose to investigate the optical properties of a recently invented class of type ii strained-layer superlattices made of (ga,as) related compounds. the new concept has advantages compared with previous efforts in that small band-gaps may be… More

We propose two novel sources for improved carbon and tellurium dopants in MBE growth for III-V compounds semiconductors where heavy doping is required. The compact carbon source is electron beam heated and has a very fast thermal response. It is expected that increased monatomic carbon species in… More

THE RECENTLY INVENTED TYPE II STRAINED LAYER SUPERLATTICES MADE OF GaInSb/InAs HAVE SHOWN GREAT PROMISE AS IR DETECTORS. MADE OF PERIODS OF MATERIALS EACH ONLY A FEW ATOMS THICK. IT HAS SEVERAL DESIRABLE OPTICAL AND TRANSPORT PROPERTIES WHICH WOUDL BECOME EVEN MORE IMPORTANT FOR VLWIR (>12um)… More

Strained layer superlattices of GaInSb/InAs have been shown to have many desirable optical and transport properties, especially for VLWIR (>12um) detection. We propose to explore its fabrication and device applications by growing on polar orientations. It is expected the piezoelectric effect would… More

A SIGNIFICANT NEED EXISTS FOR ELECTRONIC DEVICES OPERATING ABOVE 200 DEGREE C. THESE DEVICES COULD BE USED IN SENSING AND CONTROL APPLICATIONS IN TURBINE, HIGH POWER AND HIGH FREQUENCY MICROWAVE RADAR SYSTEMS, AUTOMOTIVE ELECTRONICS AND SATELLITE COOMUNICATION SYSTEMS. WE PROPOSE TO MEET THIS NEED… More

A significant need exists for solid state blue and UV light emitters. These wavelengths are useful for high density optical data storage and for visible flat panel displays. We propose to meet this need with InGaN. In(x)Ga(1-x)N is a direct, wide band gap semiconductor (2 to 3.5 ev). Its director… More

A newly discovered class of normal incidence quantum well (QW) photodetectors is proposed for very long wavelength (14-20 um) infrared detection. The material consists of bandgap engineered GaSb and GaAlSbAs L-valley QW's and its detection is based on interconduction subband transitions. Because… More

Researchers are fabricating (a1gainassb) quantum well laser structures for 2-5 m ir applications. this material system has desired properties and is compatible with iii-v device processing technology. the laser diodes are grown by molecular beam epitaxy method. researchers use in-situ monitoring… More

The future manufacturing of electronic devices will require even better control of the manufacturing process. Temperature and thin film thickness are two most critical variables in many production processes such as chemical vapor deposition (CVD), rapid thermal processing (RTP), and plasma etching.… More

An advance ultra-high vacuum (UHV) deposition system will be designed for fabrication of group IV photoemissive materials for high performance long wavelength infrared (8-12 um) focal plane applications. Device candidates including silicides, and silicon germanium superlattices and quantum wells,… More

Molecular Beam Epitaxy (MBE) is a key fabrication technology for high performance III-V and other semiconductor devices of importance to many DoD and commercial applications. A variable group III element source flux would provide agile vertical layer composition control required for sophisticated… More

A significant need exists for power switching transistors used in spacecraft power management and distribution (PMAD) modules which can operate at high temperatures (400 C). SVT Associates proposes to meet-the need for high temperature electronic devices with an innovative large gate-width GaN… More

SVT Associates proposes to demonstrate UV surface emitting lasers in the III-N material system using a proprietary epitaxial metal layer to form the bottom mirror. This metal layer significantly reduces the material deposition time and acts as a lattice matched layer for depositing the laser… More

Silicon carbide is a semiconductor ideally suited for high power, frequency, speed and temperature applications. This project proposes a unique ion beam synthesis method of epitaxial silicon carbide on compliant substrates. The technique produces low energy, high current ions to promote… More

We propose research leading to the development of an integrated sub millimeter wave downconverter utilizing Resonant Tunnel Diodes (RTD's) as the local oscillator. RTD's have already been demonstrated at Superior Vacuum Systems Associates (SVTA). Phase I research will develop the MBE growth and… More

Innovative low phase noise, wideband oscillator MMICs are proposed for high performance millimeter wave applications. Double heterostructure bipolar transistor (DHBT) deposited by MBE with carbon doped GaAsSb base layers and InP emitter and collector layers will be fabricated and tested under Phase… More

122 AlInGaN Light Emitting Diodes for Spectroscopic Applications--SVT Associates, Inc., 7620 Executive Drive, Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klaassen, Principal Investigator Dr. Peter Chow, Business Official DOE Grant No. DE-FG02-97ER82490 Amount: $74,195 A… More

High frequency power semiconductor devices based on metal insulator semiconductor field effect transistor (MISFET) structures have long been desired for microwave and millimeter wave (mm wave) applications. Unfortunately, complex interface defects and Fermi level pinning at the surface of both… More

A major innovation is needed to produce power devices which can operate at high temperatures (400 _C). Current Silicon power transistors have a maximum operating temperature typically below 150*C. High-temperature and high power electronics dictate a wide bandgap semiconductor such as SiC or GaN… More

19 Hydrocarbon Gas Sensors Based on Wide Band-Gap Semiconductors--SVT Associates, Inc., 7620 Executive Drive, Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klaassen, Principal Investigator Dr. Peter Chow, Business Official DOE Grant No. DE-FG02-97ER82491 Amount: $74,195 In… More

This proposal addresses a significant need for enhanced target discrimination by using dual wavelength focal plane for simultaneous midwave infrared (MWIR) and ultraviolet (UV) sensing. As countermeasures become more sophisticated IR imaging alone is no longer always sufficient. A dual color sensor… More

50538-98-I Hybrid Hydrocarbon/Oxygen Sensor for Automotive Emissions Monitoring--SVT Associates, Inc., 7620 Executive Drive, Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klaassen, Principal Investigator Dr. Peter P. Chow, Business Official DOE Grant No. DE-FG02-98ER82684 Amount: … More

50521-98-I Sharp Bandpass AlGaN p-i-n Photodiode Detectors for Ultraviolet B Irradiance Measurements--SVT Associates, Inc., 7620 Executive Drive, , Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klaassen, Principal Investigator Dr. Peter P. Chow, Business Official DOE Grant No.… More

This proposal addresses the significant need for high power and high temperature transistors. A major innovation is needed to produce power devices which can operate at high temperatures (400 ¿C), withstand high voltages (> 500 V) and operate at high current levels without special cooling. SVT… More

50371-98-I AIGaN Ultraviolet Light Emitting Diodes for Fiber Optic Sensors--SVT Associates, Inc., 7620 Executive Drive, Eden Prairie, MN 55344-3677; (612) 934-2100 Dr. Jody J. Klassen, Principal Investigator Dr. Peter P. Chow, Business Official DOE Grant No. DE-FG02-98ER82685 Amount: … More

65706 Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of electron accelerators. For the next Linear Collider (NLC), the polarized electron beam intensity must be at least 20 times greater than that produced by strained GaAs, used in the… More

Quantum dot (QD) infrared photodetectors offer promise to improve performance over current bulk material technology. Namely, QD devices can have higher detectivity and reduced needs for cryogenic cooling. Current QD technology has yet to achieve theoretical goals however, mostly due to… More

This Phase I program addresses the need for solar cells with greater than 30% efficiency for use as power sources for satellite systems operating in air mass zero (AM0) solar radiation. SVT Associates proposes to meet this need by developing a tandem cell composed of InGaAsN (1eV), GaAs (1.4 eV) and… More

This Phase I program addresses the need for solar cells with greater than 30% efficiency for use as power sources for satellite systems operating in air mass zero (AM0) solar radiation. SVT Associates proposes to meet this need by developing a tandem cell composed of InGaAsN (1eV), GaAs (1.4 eV) and… More

GaInSb/InAs superlattices show great promise as materials for use in very long wavelength infrared (VLWIR) detectors. This III-V compound offers advantages over current HgCdTe technology in both anticipated performance level and ancillary support system(e.g. cryogenic cooling) costs. Due to its… More

GaInSb/InAs superlattices show great promise as materials for use in very long wavelength infrared (VLWIR) detectors. This III-V compound offers advantages over current HgCdTe technology in both anticipated performance level and ancillary support system(e.g. cryogenic cooling) costs. Due to its… More

This Small Business Innovation Research Phase I project proposes a new detector material for single mode optical fiber communication over the information highway. High performance detectors are an enabling technology for the moderate to long distanceoptical transmissions at 1300 and 1550 nm… More

AlInGaN-based heterostructures have demonstrated unmatched versatility in optical and electronic applications. In particular, AlGaN/GaN high electron mobility transistors (HEMTs) are the leading candidates for realizing ultra-high frequency, low-noiseand high-power amplifiers. The addition of… More

Fiber optical transmission is increasingly applied to computer network, secure telecommunication systems, military aircraft, and even in missile guidance systems. 1300 nm vertical cavity surface-emitting lasers (VCSEL) are becoming a prefered technologyfor transceivers in short- and medium-haul,… More

Quantum dot (QD) infrared photodetectors offer promise to improve performance over current bulk material technology. Namely, QD devices can have higher detectivity and reduced needs for cryogenic cooling. Current QD technology has yet to achieve theoretical goals however, mostly due to… More

Quantum dot (QD) infrared photodetectors offer promise to improve performance over current bulk material technology. Namely, QD devices can have higher detectivity and reduced needs for cryogenic cooling. Current QD technology has yet to achieve theoretical goals however, mostly due to… More

65706 Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of electron accelerators. For the next Linear Collider (NLC), the polarized electron beam intensity must be at least 20 times greater than that produced by strained GaAs, used in… More

65706 Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of electron accelerators. For the next Linear Collider (NLC), the polarized electron beam intensity must be at least 20 times greater than that produced by strained GaAs, used in… More

70278 Commercially available photodetectors for the 8-12 micron wavelength range, needed for the monitoring of chemical weapons, are susceptible to high degrees of noise, have low operating bandwidth, and require cryogenic cooling. This project will develop a low noise, high bandwidth… More

"The material Indium Gallium Arsenide Nitride (InGaAsN) is a novel compound semiconductor ideally suited for infrared optical devices. This material may be grown on GaAs substrates and can take advantage of mature GaAs processing technology. Quantum dots,a subset of the nanotechnology field, are… More

InAs/GaInSb type II superlattices show great promise for use in Very Very Long Wavelength Infrared (VVLWIR, for wavelength > 20 um) detectors. System analysis indicates early detection of space borne vehicles is more easily achieved in this infraredregime. This III-V compound compares very… More

High power AlGa-nitride RF electronics are of great interest to various DoD applications. This proposal will utilize an advanced plasma deposition process to passivate surface traps on the devices, to dramatically reduce surface-related transient effectsand improve the device performance. We will… More

SVT Associates proposes an enhanced GaN:Er light emitting diode fabricated on silicon substrate and can be integrated with thin film waveguide, such that light propagation can be manipulated for fast on-chip or chip-to-chip interconnect. A key component ofthe optical communication on a chip is an… More

This Small Business Innovation Research (SBIR) Phase I project is directed toward the development of highly sensitive, solid-state, solar-blind photodiodes based on the group III-nitride material system, aluminum gallium nitride. Ultraviolet detectors are used in water treatment plants, automated… More

The wide bandgap material GaN is ideally suited for high power and high temperature electronics. Potential applications include high power devices such as amplifiers, mobile digital, point-to-point and satellite communications, wireless area networking(WAN), high temperature sensor and electronics… More

Fiber optical transmission is increasingly applied to computer network, secure telecommunication systems, military aircraft, and even in missile guidance systems. 1550 nm vertical cavity surface-emitting lasers (VCSEL) are becoming a preferred technology for transceivers in long-haul, and even… More

70291 Achieving 0.5 psi accuracy at pressures up to 10,000 psi in geothermal drilling applications will require precision pressure transducing technology. Capacitive pressure transducers would be ideal for both the high accuracy and high temperature stability requirements, but supporting… More

Dramatic differences in the diffusivities of the constituents of novel thin film materials and structures limit material perfection under far from equilibrium growth conditions. We will develop a new light-mass ion source, compatible with the low pressurerequirements of molecular beam epitaxy… More

InP-based devices have applications encompassing the entire communication technology including wireless and fiber-optic telecommunications. It is especially suitable for very high frequency (up to 200GHz) operation. Therefore they are increasingly acritical component in all military missions. Their… More

Organic field effect transistors (OFETs) are gaining rapid attention for their vast technical and commercial potential. Their low cost, low-temperature processing, and compatibility with flexible substrates are key attributes and are especially suitablefor large format electronics manufacturing.… More

70278S02-II Commercially available photodetectors that operate in the 3-12 micron wavelength range are needed for the Long Wave Infrared (LWIR) monitoring of chemical weapons. However, these photodetectors are susceptible to high degrees of noise, have a low operating bandwidth, and require… More

70278S02-II Commercially available photodetectors that operate in the 3-12 micron wavelength range are needed for the Long Wave Infrared (LWIR) monitoring of chemical weapons. However, these photodetectors are susceptible to high degrees of noise, have a low operating bandwidth, and require… More

70291S02-II This project will demonstrate and produce a greatly improved monolithic differential amplifier and switch, based on AlGaN/GaN High Electron Mobility Transistors (HEMTs) and passive components, that will be capable of operating in the high-temperature oil drilling environment. The… More

70291S02-II This project will demonstrate and produce a greatly improved monolithic differential amplifier and switch, based on AlGaN/GaN High Electron Mobility Transistors (HEMTs) and passive components, that will be capable of operating in the high-temperature oil drilling environment. The… More

For ultra-high power, high temperature electronics, III-N wide-bandgap materials offer substantial advantages over other semiconductor material systems. Remarkable power densities have been achieved in AlGaN-based high electron mobility transistors(HEMTs) for operation at high frequencies. Even… More

High performance InAsGaInSb superlattice detectors are of great interest to the DoD for various DoD applications and, in particular, detection of space borne objects. They are capable of infrared detection from 2 to >30 mm. This proposal will utilize anadvanced plasma deposition process to passivate… More

This Phase I project addresses the development of a process for the thermal management of semiconductor devices with diamond films grown by hot filament chemical vapor deposition (HFCVD). Thermal management of electronic and optical devices is one of themost critical areas for high power… More

This Small Business Innovation Research (SBIR) Phase I project proposes to create a new, high performance photodetector operating in the near/mid-infrared spectrum. Gallium antimonide (GaSb) will be used to create avalanche photodiodes (APDs) sensitive to wavelengths < 1.7 micron. The GaSb material… More

`This Small Business Innovation Research Phase I project is directed toward the development of a nitride-based semiconductor laser operating at 280 nm or shorter. In Phase I, high-efficiency and high power ultraviolet light emitting diodes (UV LED), incorporating novel AlGaN quantum-well (QW)… More

One of the main issues for III-nitride growth is the lack of a suitable native substrate. Growth on foreign substrates such as sapphire or SiC results in nitride material with a high density of defects due to large mismatches in lattice constant and thermal expansion. Nonetheless, nitride devices… More

73017S03-I Substantial improvements in high-power performance are predicted for high-frequency Al(In)GaN-based HEMTs on SiC substrates, which are components of Synthetic Aperture Radar systems used in national security applications. The two main issues are the growth of high-quality, insulating… More

High performance very long wavelength infrared (VLWIR) detectors play a critical role in the early detection of long range missiles. However, a single spectral wavelength (color) detector may be inadequate due to target spectral complexity and backgroundinterference. A multi-spectral focal plane… More

InP-based devices have applications encompassing the entire communication technology including wireless and fiber-optic telecommunications. It is especially suitable for very high frequency (up to 200GHz) operation. Therefore they are increasingly a critical component in all military missions. Their… More

Epitaxial growth of non-equilibrium thin-film structures, which have high quality and abrupt interfaces, is still the main challenge that limits many material systems for applications in semiconductor devices. In this STTR Phase II program, SVT Associates (SVTA) in collaboration with the University… More

Electronics circuits that can function in very high temperatures (> 450?C) are needed for a number of applications including automotive and turbine engine control, industrial high-temperature processing, geothermal and deep-well oil drilling, satellite power management systems, and future planetary… More

This Phase I STTR project addresses the development of novel Zinc Oxide-based spintronic devices. The spintronic devices will find widespread application in civilian and military markets offering new generation of transistors, lasers and integrated magnetic sensors. The objective of the Phase I… More

Avalanche photodiodes (APDs) are the detector of choice for low noise, high speed, high sensitivity photodetectors. Applications in the mid-IR (3-5 micron) include optical trace gas detection, LADAR, quantum cryptography and targeting countermeasures. Currently there are no commercially available… More

The purpose of this Phase I study is to develop quantum cascade laser (QCL) with terahertz (THz) emission. Terahertz photons have energies which lie in the regime between optical photons and high frequency radio waves and have many important commercial and military applications. In the QCL, quantum… More

Effective monitoring is critical in protecting populations against the dangers of accidental or intentional contamination of water supplies. For both civilian and military operations, fast-acting remote sensors are needed that can detect a range of possible biological and chemical substances, below… More

In the Phase I program an inovative approach to modeling and fabrication of integrated phase array antennas is proposed. The approach uses advantages of implementing scientific modeling and simulation on EM Premier workstation which enables a full 3D FDTD algorithm.The feasibility of integration of… More

79431S Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of electron accelerators. The Next Linear Collider (NLC) will require a polarized electron beam intensity at least 20 times greater than that which can be produced with strained GaAs,… More

A new Aluminum gallium nitride (AlGaN) based heterojunction field-effect transistor (HFET) structure is proposed that utilizes avalanche impact ionization for very high frequency operation (>100 GHz). The main goal of this program is to demonstrate the potential of these devices as a replacement… More

The growth and fabrication of nanostructures, particularly short period Type-II superlattices, rely on high quality crystalline materials. Defects and non-planarities on the substrate surface and non-uniformities in the epitaxial layers can impair device performance. Gallium antimonide (GaSb)… More

This Phase I SBIR project addresses the development of novel solid state Zinc Oxide-based light emitting device. These devices will find widespread application in civilian and military markets. The objective of the Phase I effort is to explore CdZnO/ZnO material system for UV emitters. SVT… More

This Phase II SBIR project addresses the development of novel solid state Zinc Oxide-based light emitting device. These devices will find widespread application in civilian and military markets. The objective of the Phase II is to develop UV/Blue emitters using the CdZnO/ZnO material system. SVT… More

Aluminum gallium nitride (AlGaN) based high electron mobility transistors (HEMTs) have been demonstrated with superior characteristics that make them promising candidates for high-performance radar, communication, imaging and other advanced applications. Still, there remain performance and… More

This Phase II program proposes a unique passivation process for infrared focal plane arrays. It entails the re-growth of isolating structures on the processed array that will passivate surface traps, leading to dramatically reduced surface-related transient effects and improved device performance.… More

This STTR Phase II program is directed toward the development of a GaN-based hetrostructure filed effect transistor (HFET) for high-power mm-wave applications. The device makes use of a recently discovered impact ionization avalanche transit time (IMPATT)

Aluminum gallium nitride (AlGaN) based high electron mobility transistors (HEMTs) have been demonstrated with superior characteristics that make them promising candidates for high-performance radar, communication and other advanced applications. Still, there remain performance and reproducibility… More

SVT Associates proposes an innovative atomic Hydrogen enhanced growth and surface preparation technique for high performance Type-II superlattice focal plane array fabrication. This material system is capable of infrared detection from 2 to > 30 micron, depending on layer composition and thickness. … More

SVT Associates proposes an innovative application of several technologies to create device quality large diameter GaSb virtual substrates on Si. In combination with this GaSb/Si substrate, a novel arsenic isolation apparatus will be applied to Type-II superlattice (SL) growth for LWIR detector… More

Latest advances in semiconductor optoelectronics makes it possible to develop compact light weight robust sources of coherent optical pulses, demanded for numerous applications such as lidars. Recent improvements in heterostructure growth and processing technology, as well as new approaches in… More

Increased power demands on satellites and remote instruments drive the need for achieving higher conversion efficiencies from solar cells with less weight and volume. Of great current interest is the ability to create nanoscale structures, with device properties that can be uniquely engineered. … More

This Phase I effort seeks to improve the yield and quantum efficiency of GaAsP photocathodes by improved growth process and post-growth fabrication steps

Many UV photon-counting and imaging applications, including space-borne astronomy, missile tracking and guidance, UV spectroscopy for chemical/biological identification, and UV medical imaging, demand very high performance in detector sensitivity, speed, resolution, and background noise. This… More

This Small Business Innovation Research Phase I project proposes a novel method to encapsulate organic light emitting diodes (OLEDs). Compared with the inorganic counterparts, OLEDs have the advantages of low-cost, large-area, small footprint, flexible usage, and low-temperature processing. However,… More

High-performance, molecular sieve membranes are sought by DOE to separate hydrogen from other gases (mainly carbon diode) in coal gasification processes. However, because of defects, the selectivity of crystalline, silicate-based, molecular sieve membranes can be compromised. This project will… More

Compared to DC electron guns, the significantly-higher field gradients that are possible with an radio frequency (RF) gun would allow short pulse generation, which would make an RF buncher unnecessary. This in turn would allow for a much simpler injector design in high-energy beam facilities, such… More

This Small Business Innovation Research (SBIR) Phase I project is directed toward the development of innovative high-efficiency UV photocathodes based on the wide bandgap III-nitride semiconductors. Photocathodes based on AlxGa1-xN alloy with a bandgap of 3.4 to 6.2 eV (for Al composition x from 0… More

This Small Business Innovation Research Phase I project proposes a self-limited method to repair defects in c-oriented zeolite molecular sieve membranes. In this project, we will use a self-limited catalyzed low temperature method to grow silicate coatings inside the defective membrane regions. The… More

Improved, high-sensitivity, large-area UV detectors are sought for many photon-counting and imaging applications. In particular, for nuclear and high energy physics research, there is a need to extend the sensitivity of photon detectors to the blue and UV wavebands. In addition, the photocathodes… More

This Small Business Innovation Research Phase I project addresses the development of solid state ultraviolet/blue light emitting diode (LED) using novel approaches for ptype doping of ZnO. The proposed concepts offer a solution to current p-type doping problem, which is the main obstacle in the… More

SVT Associates proposes an innovative ion-beam, atomic Hydrogen and off-axis substrate techniques for device quality large diameter InSb for 3-5 um IR detector applications. Photodetector arrays using this material are of great interest to the DoD for various applications including, in… More

Hyperspectral imaging arrays offer far more data and the ability to discriminate objects being observed. Continued difficulties with applying HgCdTe materials, especially for LWIR, present an opportunity for the development of alternate materials. One such candidate for MWIR/LWIR photodetectors are… More

SVT Associates proposes a 6-month Phase I investigation to create high efficiency photovoltaic cells on silicon substrates through the use of multiple junction absorbing layers. The key technology to be investigated is the epitaxial growth of compound semiconductor on Si. Si substrates are favored… More

Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of current electron accelerators. However, future systems, such as the International Linear Collider (ILC), will require significant upgrades to these photocathodes. For example, the polarized… More

Negative-electron-affinity photocathodes, which produce polarized electrons, are a vital component of electron accelerators such as that at the Stanford Linear Accelerator Center. Future systems, such as the International Linear Collider, will require a polarized electron beam intensity at least 20… More

Long shelf life food packaging is a critical to maintaining the crew's well being in NASA's manned missions to the mars. Not only does the packaging have to offer an effective means to preserve the food's nutrition and flavor over a long period of time, but the packaging material itself should be… More

Hyperspectral imaging arrays offer far more data and the ability to discriminate objects being observed. Continued difficulties with applying HgCdTe materials, especially for LWIR, present an opportunity for the development of alternate materials. One such candidate for MWIR/LWIR photodetectors are… More

For most commercial applications ¿ such as flame and arc sensing, air and water purification, and combustion monitoring ¿ the requirements for ultraviolet (UV) light detection are adequately provided by commercially available GaN-based photodiodes. However, many UV photon-counting and imaging… More

SVT Associates proposes an innovative atomic Hydrogen enhanced growth and surface preparation technique for high performance type-II superlattice focal plane array fabrication. This material system is capable of infrared detection from 2 to > 30 micron, depending on layer composition and thickness. … More

In this NASA SBIR Phase I proposal we propose to apply a highly conformal coating of ZnO and AlN or a double layer of GaN to the surface and internal pore walls of conventional microchannel plates (MCP). This will lead to enhanced secondary electron emission (SEE) and, thus, improve MCP gain for UV… More

High quality GaN epitaxial films are key to current efforts for development of both high-power/high-speed electronic devices and optoelectronic devices. In fact, solid state lighting, high-temperature and high-power electronics, microelectronic and mechanical sensors, and high-efficiency solar… More

SVT Associates proposes an innovative 24-month Phase II program to further develop high performance Type-II superlattice focal plane arrays on Silicon substrates up to 6-inches in diameter. The Type-II superlattice material system is capable of infrared detection from 2 to > 30 micron, depending on… More

This proposed Phase II program seeks to create dual-band pixel-collocated MWIR/LWIR photodetector arrays based on III-V semiconductor materials in a Type-II superlattice structure. The Type-II superlattice offers a customizable cutoff wavelength while maintaining a lattice-matched condition to the… More

High quality GaN epitaxial films are one of the keys to current efforts for development of both high-power/high-speed electronic devices and optoelectronic devices. In fact, solid state lighting, high-temperature and high-power electronics, microelectronic and mechanical sensors, and high-efficiency… More

This Small Business Technology Transfer Research Phase I project is directed toward the development of a high-efficiency and high-power AlGaN-based semiconductor light emitting diode (LED), operating at 300nm or shorter, for a wide range of applications including air and water purification, polymer… More

This Phase I SBIR program is directed toward the development of a novel low-voltage (~10V) AlGaN-based multi-quantum well (MQW) avalanche photodiode (APD) on low-cost substrates. The high-gain, high-speed and low-noise operation of the proposed device allow the replacement of bulkier and more… More

Nuclear physics research has a need to develop inexpensive, position-sensitive, large-sized photon detection devices for Cherenkov counters. A UV photon detector is an essential part of Cherenkov counters. Currently, microchannel plate (MCP) detectors are used extensively in UV instruments. MCPs… More

Very-long-wavelength infrared (VLWIR) photo detectors are needed for infrared-based chemical identification and terrestrial mapping applications associated with the detection of weapons of mass destruction. This project will develop a material system for a high-performance type-II VLWIR photo… More

Photocathodes play a key role in the electron injectors used at DOE accelerator facilities. Metallic photocathodes are very robust, have long lifetimes, and provide the convenience of air transportability. The main disadvantage of these cathodes is their very low quantum efficiency (QE). On the… More

In this SBIR Phase I program, we propose to fabricate high-efficiency and radiation hard solar cells based on InGaN material system that can cover the whole solar spectrum by adjusting the alloy composition. The main program objectives include the fabrication of InGaN-based solar cells on large… More

Exposure to high energy radiation can produces disruptive transient behavior as well as long-term changes in electronic device and circuit characteristics. Depending on both the material properties and radiation characteristics, these effects may result in parametric degradation or functional… More

Advanced electron injectors are based on photocathode electron guns. These guns can produces electron beams with short pulses and high brightness. High efficiency photo-injectors are the electron source of choice for future linear accelerators (linacs) and colliders, energy recovery linear… More

SVT Associates proposes an innovative digital alloy technique to extend the cutoff wavelength of InAsSb beyond 5 um, a wider band gap InAlAsSb layer inserted into depletion region to suppress dark current, and atomic layer deposition technique to coat radiation-hard material AlN on InAsSb detectors… More

This proposal is directed toward the development of innovative high-efficiency UV photocathodes based on the wide bandgap III-nitride semiconductors for reliable operation at high temperature and high radiation environments for future NASA missions near the Sun and in deep atmospheres of Venus and… More

Current technology for detecting long wavelength and very long wavelength infrared light, such as mercury cadmium telluride-based sensors, suffers from deleterious characteristics such as high noise and high cost. Creating detectors that operate in this wavelength range that reduce noise and cost… More

The negative-electron-affinity (NEA) photocathodes which produce polarized electrons are a vital component of electron accelerators such as that at the Stanford Linear Accelerator Center (SLAC), which is used in the current generation of photocathodes. Quantum efficiencies thus far are on the order… More

SVT Associates proposes an novel type II superlattice structure to extend the cutoff wavelength and CBIRD SL photo diode structure with unipolar barriers to suppress dark current of SL detectors grown on GaSb substrate. This InAs/GaSb superlattice material system is capable of infrared detection in… More

Recently, resonant-tunneling-diode (RTD) based circuits employing monolithically-integrated RTD on high electron mobility (HEMT) structures have been developed in a number of III-V systems in order to improve operational speed. The main goal of this program is to develop wide temperature-operable… More

Photocathodes with spin-polarized electron emission are used in physics research. Current photocathodes offer high polarization, but low total currents, and have limited lifetime. Research involving these polarized electrons would be more productive if a higher electron current were provided. This… More

For several decades photomultiplier tubes (PMTs) have been the main technology for sensitive and low noise detection of photons in many high energy physics experiments. However, compared to solid-state photodetectors, PMTs are bulky, fragile, expensive, and need to be shielded from high magnetic… More

The negative-electron-affinity (NEA) photocathodes which produce polarized electrons are a vital component of electron accelerators such as that at the Stanford Linear Accelerator Center (SLAC). Future systems, such as the International Linear Collider (ILC), will require a polarized electron beam… More