Accession Number : AD0912522

Title :   1.06 Micron High Sensitivity IR Photocathode.

Descriptive Note : Annual rept. 6 Mar 72-30 May 73,

Corporate Author : ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s) : Harris, J. S., Jr

Report Date : AUG 1973

Pagination or Media Count : 93

Abstract : The design and progress towards development of a field assisted double heterojunction photocathode with high quantum efficiency at 1.06 micron is reported. This project covers three main areas: 1. The growth by liquid phase epitaxy and characterization of GaAsSb and GaAlAsSb alloys of suitable composition for fabricating a heterojunction photocathode. 2. Experimental and theoretical studies on the electron and hole transport and optical properties of heterojunctions between various III-V alloys grown by liquid phase epitaxy. 3. The design, fabrication and testing of a double heterojunction p-n-p photocathode structure with a p-n junction collector. Experimental studies on the electrical transport and optical properties of the heterojunctions required for the photocathode show that the anticipated problems with potential barriers in the conduction band do not exist. These results have significant implications for many other heterojunction devices. All of our results in this program support the validity of the double heterojunction photocathode concept. The only remaining problem to realize this structure is to refine the materials and fabrication technology. (Author)

Descriptors :   *PHOTOCATHODES), (*INFRARED DETECTORS, (*PHOTODIODES, GALLIUM ARSENIDES), (*SEMICONDUCTOR DIODES, PHOTOSENSITIVITY), INFRARED RADIATION, LOW LIGHT LEVELS, SENSITIVITY, EFFICIENCY, RESPONSE, PHASE STUDIES, EPITAXIAL GROWTH, GALLIUM ALLOYS, ARSENIC ALLOYS, ANTIMONY ALLOYS, ALUMINUM ALLOYS, DOPING, NEODYMIUM, BAND THEORY OF SOLIDS, ENERGY, NOISE(RADIO), EXCITATION, ELECTROSTATIC FIELDS.

Subject Categories : Electrical and Electronic Equipment
      Infrared Detection and Detectors
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE