Award Data

Current state-of-the-art infrared focal plane arrays are based on HgCdTe grown on bulk CdZnTe substrates. The use of Si-based substrates would eliminate a number of drawbacks related to the HgCdTe/CdZnTe system and permit larger formats. We have developed growth protocols that produce material with good crystal quality for such a highly mismatched heteroepitaxial system. Double crystal rocking c ...

Hydrogen isotopes have been shown to reduce the electrical effects of various semiconductor defects. Specifically, monoatomic hydrogen and deuterium passivate the electrical activity of defects such as dislocations in long-wavelength HgCdTe grown on Si. We propose a novel method of controlling the intake of hydrogen in HgCdTe IRFPAs by using the H2/He plasma afterglow formed by flowing plasma-gene ...

Current state-of-the-art infrared focal plane arrays (IRFPAs) are based on HgCdTe material epitaxially grown on bulk CdZnTe substrates. The size of the IRFPAs is limited by the size of the available CdZnTe substrates and the thermal mismatch between CdZnTe and the Si readout circuit, which misaligns the photodiode array with respect to the circuit during heating and cooling cycles. Having HgCdTe ...

MicroLink proposes a novel device structure which combines ultra-thin, high-efficiency, GaAs-based multijunction solar cells with a novel packaging approach that will result in high flexibility, elastic solar sheets. MicroLink has developed a process that produces ultra-thin, flexible solar cells. In this project, these an array of these flexible solar cells will be incorporated onto an elastic sh ...

Helicopters with articulated rotor blades are subject to the well-known ground resonance where the rotor lag mode interacts, in an unstable fashion, with fuselage roll. To eliminate this ground resonance, both lag dampers and fuselage roll dampers are required. The Sikorsky UH-60 helicopter platform, which comprises the vast majority of utility rotorcraft used by the US Army and the Navy, relies u ...

This proposal seeks to develop novel, widely tunable bandstop filters for the suppression of co-site interference in next generation phased array radar and electronic warfare systems. The filters are based upon highly loaded evanescent mode cavity resonators that are integrated into standard printed circuit board substrates. This integration and design strategy yields high resonator Q performance ...

OAE has proved to be an important measurement for hearing conservation programs. OAEs are sounds made by healthy inner ears in response to acoustic stimulation and are measured in the ear canal with a miniature microphone. One impediment to OAE testing on a large scale, such as in military hearing conservation programs, is the lack of a high-quality, reliable ear-probes which house the miniature m ...

Phase II will enable KBEI to demonstrate a complete high pressure Micro Injection System on a Navy UAV engine in a laboratory environment. While the Micro Injectors and Micro Pump have been successfully proven at lower pressures, this STTR program has facilitated research and development of a higher pressure injection system designed for use with heavy fuels. At the conclusion of the Phase II ST ...

A software toolkit for Abaqus (XSHELL) will be developed for fracture evaluation and load deflection prediction of welded aluminum ship structures subjected to impulsive loading. The mesh independent crack description and fracture energy dissipation will be achieved in XSHELL through the implementation of two overlay elements with an embedded cohesive interaction along an arbitrary crack segment w ...

Throughout history, the ability of a fighting force to respond to battlefield casualties, perform triage, and evacuate their wounded to a treatment facility has been crucial to the long-term success of the force. Until now, the ability of medical personn