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THIS PROPOSAL ADDRESSES THE DEVELOPMENT OF A SOLID STATE LASER SCANNER FOR ROUTING A HIGH ENERGY LASER BEAM AMONG THE FIBER OPTIC ENERGY TRANSFER PATHS OF A LASER ORDNANCE INITIATION SYSTEM. A SOLID STATE LASER SCANNER WITH NO MOVING PARTS WILL ENABLE A MORE COMPACT AND DURABLE LASER ORDNANCE INITIATION SYSTEM. APA OPTICS' SOLID STATE LASER SCANNER UTILIZES INTERGRATED OPTIC WAVEGUIDES OF ALGAAS A ...

THIS PROPOSAL DESCRIBES A PHASE I PROGRAM AIMED AT DEVELOPING SUPERCONDUCTOR INSULATOR SUPERCONDUCTOR (SIS) DETECTORS IN THIN FILMS OF YBACUO DEPOSITED ON SRTIO3 SUBSTRATES. WHEN OPERATEDIN THE QUANTUM MODE, OUR PROPOSED HTC BASED SIS DETECTOR CAN POTENTIALLY HAVE A VERY HIGH SENSITIVITY FOR LWIR DETECTION. WE PLAN TO USE AUNIQUE MOCVD BASED ATOMIC LAYER EPITAXY APPROACH. OUR SELECTION OF ATOMIC L ...

VERTICAL CAVITY SURFACE EMITTING LASERS ARE UNDER DEVELOPMENT AT SEVERAL U.S. LABS WHICH CONSIST OF A GAAS/ALGAAS QUANTUM WELL FABRY-PEROT CAVITY SANDWICHED BETWEEN N AND P DOPED HIGH REFLECTIVITY SEMICONDUCTOR MIRRORS (GAAS/ALGAAS QUARTER WAVE STACKS). OUR PHASE I RESEARCH PROVES THE FEASIBLITY OF UNIQUE APPROACH TO THE ELECTRIC ADDRESSABILITY OF THESE SURFACE EMITTING LASERS. FOR ADDRESSING A (M ...

HIGH SPEED OPTICAL LINKS ARE FINDING EVER INCREASING USES INOPTICAL COMMUNICATIONS AND SIGNAL PROCESSING APPLICATIONS. CURRENTLY AVAILABLE PLANAR WAVEGUIDE LASERS USED IN THESE LINKS SUFFER FROM A HIGH INSERTION LOSS DUE TO A MODE MISMATCH BETWEEN THE FIBER AND THE MODULATOR AND THE INABILITY TO IMPLEMENT A 2D ARRAY CONFIGURATIONS. THE VERTICAL CAVITY SURFACE EMITTING LASERS (VCSEL) CURRENTLY UNDE ...

THE PROPOSED PROGRAM IS AIMED AT DEVELOPING ALX GA1-XN/GAN HETEROSTRUCTURE DEVICES FOR HIGH TEMPERATURE SENSOR AND ELECTRONICS APPLICATIONS. WE WILL FOCUSS ON AN ALXGA1-XN BASED HIGH ELECTRON MOBILITY TRANSISTOR (OR HEMT) FOR USE ASA HIGH TEMPERATURE MICROWAVE DEVICE OR AS A SENSITIVE ULTRAVIOLET DETECTOR. GAN HAS A LARGE BANDGAP OF 3.2 EV WHICH GIVES IT A GREATER BREAKDOWN VOLTAGE AND A HIGHER SA ...

THIS PROPOSAL DESCRIBES AN APA OPTICS PROGRAM TO DEVELOP A HIGH SPEED (100GHZ) GAAS WAVEGUIDE BASED MACH ZEHNDER MODULATOR. OUR APPROACH CENTERS ON THE USE OF A BURIED ELECTRODE CONFIGURATION TO ACHIEVE VELOCITY MATCHING OF THE RF AND OPTICAL SIGNALS. THIS WE FEEL WILL RESULT IN A DEVICE WITH A BROADBAND RESPONSE FROM DC TO 100GHZ. WE WILL WORK IN CONJUNCTION WITH THE ULTRFAST SCIENCE LAB AT THE U ...

GaN high electron mobility transistors or HEMTs are proposed for use as high temperature electronic devices. HEMTs are excellent for both power and low noise amplification since they posses a high carrier concentration and an enhanced carrier mobility. GaN has a large bandgap of 3.2 a, which gives it a greater breakdown voltage and a higher saturated electron velocity than GaAs. GaN, in addition, ...

WE PROPOSE A PHASE I RESEARCH PROGRAM AIMED AT DEPOSITING SINGLE CRYSTAL BN FILMS OVER SAPPHIRE AND SILICON CARBIDE SUBSTRATES. OUR PLAN IS TO EMPLOY A UNIQUE PHOTO-ASSISTED SWITCHED ATOMIC LAYER EPITAXY PROCESS. THIS WE FEEL WILL REDUCE THE SINGLE CRYSTAL EPITAXY TEMPERATURE VALUES CLOSE TO 1400C. WE ALSO PROPOSE TO USE A UNIQUE MULTILAYER BUFFERING PROCEDURE TO DECREASE THE INTERFACE DEFECTS RES ...

Electronic devices which operate at high temperatures could be used in many military and commercial systems. GaAs and Si based devices cannot operate at these temperatures and require cooling. Wide bandgap material such as diamond, SiC and GaN have greater breakdown voltages, higher operating temperatures, and higher saturated electron velocities than either GaAs or Si. However, these material sys ...

THE LONG-TERM OBJECTIVE OF THIS PROJECT IS TO IMPROVE THE SURFACE PROPERTIES OF ARTIFICIAL CORNEA OVERLAY IMPLANTS FORUSE IN REFRACTIVE SURGICAL PROCEDURES. THIS WILL BE DONE BYCOVALENTLY IMMOBILIZING CELL ADHESION PROTEINS TO THESE LENSES TO PROMOTE EPITHELIALIZATION OVER THE SYNTHETIC MATERIALS. THE SPECIFIC AIMS OF PHASE I WILL BE TO USE PROPRIETARY CHEMISTRIES TO PREPARE DERIVATIVES OF CELL AD ...