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Aluminum Nitride (A1N) substrates are attractive for III-nitride epitaxial growth due to their high thermal conductivity, close lattice and thermal expansion match to IlI-nitride compositions used for opto-electronic and electronic devices and their relative ease of growth when compared to Gallium Nitride (GaN). Vapor sublimation is an attractive method for growing A1N bulk crystals. Seeded growth ...

Conductus proposes to develop high-quality hiqh-temperature superconducting (HTS) thin films on polycrystalline substrates for high-frequency applications. The approach will utilize a novel technology based on ion-beam assisted deposition (IBAD) for biaxial texturing of oxide films currently under investigation at Stanford University. IBAD will be used to deposit oriented buffer layers on poly-cry ...

We propose to develop technology for a new generation of ultra-compact, low-cost fiber sensors for detecting gamma- and x-rays. Long-period gratings embedded in a fiber will couple light between the fiber core and a special sensitized fiber cladding. We will investigate the most advantageous grating geometries for such sensors. The fundamental design of a fiber grating based sensor array will be d ...

A novel fiber Bragg grating stabilized laser array is proposed here. The multi-wavelength source is aimed at low cost dense wavelength division multiplexing (DWDM) applications where the superior properties, i.e., low chirp, low temperature dependence, of the fiber Grating is utilized. The resultant product is a coolerless multi-wavelength laser source that can be modulated with direct current. T ...

Implant Sciences Corporation proposes to develop a superior power transistor design based on ion implanted nitride semiconductor materials which will be produced at Howard University. Our lateral device design features an inverted GaN channel with the AlGaN charge supply layer doped by ion implantation. Ion implantation allows selective area doping, which will let us create for the first time an u ...

Three-dimensional printed preforms will be used as mold patterns for MMCC's high-density, pressure resistant, castable refractory. Hard tooling will be eliminated from the Advanced Pressure Infiltration Casting process (APIC ). Cost for Al/Sic electronic housings will be slashed 75% over conventional pressure casting. Complex parts will be easily manufactured. Design modifications can be quickly i ...

The goal of the SBIR Phase I proposal is an attempt to grow the world's first single crystalline new wide band gap nitride semiconductors by MOCVD for developing optoelectronic and optical devices in yellow to green visible band as well as lattice matched heterostructure wide band gap electronic devices. The expected direct transition, wide band gap electronic structure and the significant nonline ...

This proposal describes an innovative scheme to develop lightweight, high efficiency prime power transfer system capable of delivering a large amount of electric power for aerospace propulsion. The key innovations essential to the system include: 1) high efficiency quasi-optical solid-state transmitter array; 2) electronic beam steering; 3) high efficiency dual polarized rectenna; 4) the bus-bar d ...