Award Data

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 applications ¿ including Cherenkov light detection, space-borne astronomy, and UV spectroscopy � ...

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. Photodetector arrays using this material are of great interest to the DoD for various applications ...

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 /X-ray detectors. The ZnO/ALN(GaN) hetrostructure using nano ZnO needles as templates has been demon ...

New experiments and technologies in the science of physics employ electrons with a certain and known polarization. Sources of these electrons typically have imperfect polarization less than 80 percent and low quantum efficiencies less than 1 percent. Increasing either or both of these device properties greatly enhances the physics research being undertaken in facilities such as high energy collide ...

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 layer composition and thickness. Photodetector arrays using this material are of great interest to ...

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 curing, fluorescent spectroscopy, secure optical communications and biological and chemical hazard m ...

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 have many advantages over the conventional photomultiplier tube (PMT) currently used in Cherenkov det ...

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 detector fabricated on a GaSb substrate. The approach will involve (1) a strain-compensated type II supe ...

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 other hand semiconductor cathodes generally have much higher QE but shorter lifetime than metallic ca ...

THIS RESEARCH SHALL FOCUS ON TWO IMPROVEMENTS TO THE CURRENTSTATE OF MODELING AND SHAPE CONTROL OF LARGE SPACE STRUCTURES: (1) THE USE OF FREQUENCY DOMAIN/SPECTRAL FACTORIZATION METHODS FOR THE DEVELOPMENT OF SHAPE CONTROL LAWS: AND (2) THE USE OF ADVANCED METHODS, INCLUDING HOMOGENIZATION, OR THE REDUCTION OF COMPLEXITY OF THE MODELSOF LARGE SPACE STRUCTURES WITH REGULAR LATTICE STRUCTURE. THE AP ...