Abstract:ZINC SELENIDE (ZNSE) HAS IMPORTANT POTENTIAL APPLICATIONS ASA MATERIAL FOR VISIBLE LIGHT EMITTING DEVICES AND SHORT WAVELENGTH LASERS FOR DISPLAY APPLICATIONS. METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) OF ZNSE IS THE MOST PROMISING PRODUCTION METHOD BUT IS HAMPERED BY ITS USE OF HYDROGEN… more
Abstract:IN THE NEXT DECADE INDIUM PHOSPHIDE BASED LASERS ARE EXPECTED TO BE CRITICALLY IMPORTANT IN INTEGRATED ELECTROOPTIC DEVICES AND FIBER OPTICS COMMUNICATION DUE TO THEIR HIGH SPEED AND BANDGAP IN THE NEAR INFRARED SPECTRAL REGION. SEMI-INSULATING TITANIUM DOPED INDIUM PHOSPHIDE IS REQUIRED FOR… more
Abstract:SINGLE CRYSTAL BATIO3 HAS ELECTRO-OPTIC AND PHOTOREFRACTIVE PROPERTIES THAT ARE AMONG THE MOST DESIRABLE OF ALL INORGANIC MEDIA. THE MATERIAL ALSO POSSESSES FERROELECTRIC PROPERTIES AND AN EXCEPTIONALLY HIGH DIELECTRIC CONSTANT, WHICH MAKE BATIO3 FILMS HIGHLY ATTRACTIVE FOR RADIATION HARD AND DRAM… more
Abstract:MCNC PROPOSES A FEASIBILITY STUDY AND EVALUATION OF THREE PROMISING APPROACHES TO THE FABRICATION OF SURFACE TEST STRUCTURES ON SILICON. SURFACE FEATURES ON THE FIRST STRUCTURE WILL BE PRODUCED BY CONTROLLABLY ETCHING THERMALLYGROWN OXIDES. FEATURES ON THE SECOND WILL BE MADE BY ETCHING… more
Abstract:The need for compact solid state ultraviolet light sources includes clinical light sources for a variety of surgeries, analytical instrumentation sources and communications systems based on shorter wavelengths that will be able to handle higher information densities. Such advanced optoelectric… more
Abstract:ORGANOMETALLIC VAPOR PHASE EPITAXY (OMVPE) IS A PROMISING TECHNIQUE FOR PRODUCING ULTRAHIGH PURITY III-V COMPOUND SEMICONDUCTOR. OMVPE CAN PRODUCE COMPLEX LAYERED STRUCTURES WITH THE ABRUPT INTERFACES REQUIRED FOR ADVANCED ELECTRONIC AND PHOTONIC DEVICES. UNFORTUNATELY, OMVPE CURRENTLY REQUIRES… more
Abstract:METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) HAS BECOME A SUCCESSFUL THIN FILM GROWTH TECHNIQUE DUE TO ITS INHERENT CONTROL OVER FILM COMPOSITION, PURITY, UNIFORMITY AND DEPOSITION RATE. THIN FILM TECHNOLOGY FOR FERROELECTRIC MATERIALS SUCH AS LEAD TITANATE AND PZT IS IN GREAT DEMAND DUE TO MANY… more
Abstract:DNA AND BIOSEQUENCES ARE BEING DETERMINED FASTER THAN THEY CAN BE COMPARED AND ANALYZED. PRESENT TECHNIQUES FOR RIGOROUSLY SEARCHING A LARGE DATABASE ARE COSTLY AND TIME CONSUMING. UNDER ALL PLAUSIBLE GROWTH PROJECTIONS, THE PROBLEM WILL SOON BECOME OVERWHELMING. A CUSTOM, VERY LARGE SCALE… more
Abstract:DIAMOND AND COPPER ARE UNIQUE IN THEIR ABILITY TO EFFICIENTLY CONDUCT HEAT, MAKING THEM PREMIER MATERIALS FOR ELECTRONIC APPLICATIONS FOR WHICH HEAT REMOVAL IS CRITICAL TO SYSTEM PERFORMANCE. DIFFERENCES IN THEIR OTHER PROPERTIES MAKE IT ATTRACTIVE TO COMBINE THESE TWO MATERIALS INTO A… more
Abstract:Many key steps in semiconductor "chip" manufacture utilize gases to form thin films which are critical to both device performance and cost. Over $2 billion worth of equipment, materials and peripherals are now sold annually to the semiconductor manufacturers who use gas phase processing. As… more
Abstract:High temperature superconducting (HTSC) materials offer the potential for major cost and performance advantages in advanced high frequency communications and radar sytems. Key to the use of these materials in subsystems is the fabrication of components, especially low loss switches, which can… more
Abstract:The continuing drive toward increased circuit densities in dynamic random access memories (DRAMs) has spurred great interest in new dielectric materials that permit greater storage capacitor charge density. Ferroelectrics are particularly attractive because of their intrinsically large dielectric… more
Abstract:The use of optoelectronic materials, such as gallium arsenide, in applications ranging from fiber optics to solid-state lasers has been growing rapidly. The fabrication of these materials requires exacting control over material composition, purity, uniformity and production rate. Typically these… more
Abstract:Infrared radiation sensing has grown rapidly as both a military and commercial detection and measurement technique. Recently the sensitivity of infrared detection has been improved by the used of focal plane arrays which have the capability of imaging scenes of very low contrast by collecting… more
Abstract:THE INTEGRATED UNDERSEA SURVEILLANCE SYSTEM (IUSS) IS ASSESSING THEFEASIBILITY OF APPLYING NON-DEVELOPMENTAL (NDI) SOFTWARE TO HELP SATISFY IUSS PLATFORM MISSION OBJECTIVES. ACS PROPOSES TO INTEGRATE GOVERNMENT OWNED NDI COMMUNICATION, LINK CONTROL AND MESSAGE/DATA PROCESSING SOFTWARE INTO A UNIX… more
Abstract:A discrete event computer simulation will be developed and used to evaluate the expected performance of the UHF satellite communications Automatic Demand Assignment Multiple Access (Auto-DAMA) Subsystem. Phase I will describe UHF DAMA traffic scenarios, define design requirements for the Auto-DAMA… more
Abstract:THE PRIMARY OBJECTIVE OF THIS PROJECT IS TO DETERMINE THE FEASIBILITY OF INCREASING THE QUANTITY AND QUALITY OF SCIENCE EDUCATION IN ELEMENTARY SCHOOLS THROUGH UTILIZING SCIENCE EDUCATION AS THE CONTENT OF CHOICE FOR A RELATIVELY NEW ADDITION TO THE ELEMENTARY SCHOOL CURRICULUM, FOREIGN LANGUAGE.… more
Abstract:MISSILE SEEKERS MUST DETECT TARGETS IN DUAL BANDS (3-5 UM AND 8-12 UM). THEY NOW USE HYBRID ASSEMBLY OF TWO SEPARATE ARRAYS, WHICH INCREASES THE POWER, CONSUMPTION, THE WEIGHT, AND THE COST. WE WILL DEVELOP MONOLITIHIC DUAL BAND 128X128 STARING ARRAYS ON HGCDTE MATERIAL. THE INNOVATION IS THE… more
Abstract:Recent advances enable thermionic converters to achieve energy conversion efficiencies of up to 30%. Advanced Energy Technology will explore this technology for nuclear space power. High efficiency means that more power can be obtained with a smaller system radiator; this reduces spacecraft mass and… more
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