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High speed, low cost optical self routing optical crossbar switches with gigabit data rates are key components in optical communication and routing systems. We propose to fabricate and study a monolithically integrated optical crossbar switch which will be inexpensive and high performance. This integrated switch utilizes thin film emitters and detectors integrated directly onto a host integrated c ...

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RECENT DEVELOPMENTS IN OPTICAL COMMUNICATION TECHNOLOGY ARE VERY ENCOURAGING FOR THE POTENTIAL OPERATION OF OPTICAL SATELLITE CROSSLINKS. MOST NOTABLE IS THE DEVELOPMENT OF HIGH EFFICIENCY ND:YAG RING LASERS WHICH WOULD BE ATTRACTIVE TRANSMITTERS IF WIDE BANDWIDTH EXTERNAL PHASE MODULATORS COULD BE DEVELOPED. A TRAVELING-WAVE CONFIGURATION GIVES THE MAXIMUM BANDWIDTH FOR ELECTRO-OPTIC MODULATORS. ...

HIGH POWER SEMICONDUCTORS USING SILICON AND GAAS ARE LIMITED TO ENVIRONMENTS THAT ARE LESS THAN 300 DEG C IN TEMPERATURE DUE TO LOW BANDGAPS, LOW BREAKDOWN FIELDS AND LOW THERMAL CONDUCTIVITIES. 3C-SIC(B-SIC) HAS BEEN IDENTIFIED AS A MATERIAL WITH EXCELLENT POTENTIAL TO FULFILL THE REQUIREMENTS OF A HIGH POWER, HIGH TEMPERATURE SEMICONDUCTOR WITH HIGH RADIATION HARDNESS. THE KEY TO DEVELOPING DEVI ...

THE USE OF OPTICAL SYSTEMS IN HIGH SPEED SIGNAL PROCESSING APPLICATIONS IS DESTINED BECAUSE OF THE OVERWHELMING ADVANTAGES OF PARALLEL DATA TRANSMISSION. MANY APPLICATIONS REQUIRE NONLINEAR TRANSFORMATIONS TO BE PERFORMED IN PARALLEL AT HIGH SPEED AND RESOLUTION. THE USE OF ORGANIC MATERIALS WITH LARGE OPTICAL NONLINEARITIES IS PARTICULARLY ATTRACTIVE BECAUSE OF THEIR FAST RESPONSE, BROADBAND TRAN ...

WIDESPREAD APPLICATION OF HIGH PERFORMANCE DEVICES BASED ON III-V, IV-IV, OR DIAMOND COMPOUND SEMICONDUCTORS WILL DEPEND ON THE DEVELOPMENT OF MANUFACTURING METHODS. RECENTLY, DR. MAX YODER OF ONR PROPOSED A RADICALLY NEW GROWTH SEQUENCE APPLICABLE TO THE GROUP IV SEMICONDUCTORS IN GENERAL AND TO DIAMOND IN PARTICULAR. FOR DIAMOND, IT IS ANTICIPATED THAT ALTERNATE INTRODUCTION OF CH4 AND CF4 TO TH ...

SOLID METAL FUELS CAN PROVIDE GREATER THRUST AND FUEL EFFICIENCY THAN LIQUID FUELS. BORON PARTICLES, A MOST ATTRACTIVE SOLID FUEL ON A THERMOCHEMICAL BASIS, IGNITE UPON EXPOSURE TO MOIST AIR AND UNDERGO A RAPID COMBUSTION WITH HIGH VOLUMETRIC HEAT RELEASE. UNFORTUNATELY, THIS REACTION IS SIGNIFICANTLY SLOWED BY IMPURITIES IN THE BORON AND BY THE FORMATION OF OXIDES UPON THE PARTICLE SURFACE DURING ...

SEMICONDUCTING DIAMOND HAS MANY NOVEL PROPERTIES, MOST NOTABLY A STABLE NEGATIVE ELECTRON AFFINITY SURFACE. CONDUCTION BAND ELECTRONS ARE READILY EMITTED FROM A NEGATIVE ELECTRON AFFINITY (NEA) MATERIAL BECAUSE THE BULK CONDUCTION BAND LIES ABOVE THE VACUUM LEVEL. IN THE PHASE I PROGRAM WE WILL CONSTRUCT A NEGATIVE ELECTRON AFFINITY DIAMOND VACUUM COLLECTOR TRANSISTOR AND INVESTIGATE THE PERFORMAN ...

Over the past twenty years two-dimensional spatial light modulators (SLM's) have been identified as a critical element in a many applications. While large electro-optic effects can be engineered in composite structures such as multiple quantum-wells or liquid crystals, SLM's based on ceramic materials in the PbLaZrTiO3 (PLZT) family of compounds show a unique combination of high transparency iind ...