Accession Number : AD0646927

Title :   DETECTOR INVESTIGATION FOR 8-15 AND 100-4000 MICRON REGIONS.

Descriptive Note : Semiannual technical summary rept. no. 22, 1 Jul-31 Dec 66,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Shenker,H.

Report Date : JAN 1967

Pagination or Media Count : 58

Abstract : Emphasis was placed on research on the preparation of Cd3As2, Zn3As2, and their alloy system. Successful growth of sound, single crystal ingots of the alloy system by the Bridgman technique was achieved. Successful epitaxial growth of Cd3As2 layers on alloy substrates was also achieved. The response of the InSb free electron (Rollin Detector) was extended into the 120 to 200 micron spectral region. By using high purity InSb intentionally doped with Se it was found that Rollin detectors usable at wavelengths as short as 80 microns could be obtained. The study of the magnetically tuned InSb detector was continued. It was found that operation in the longitudinal direction generally resulted in a detector having such a large noise that it was not usable. For a detector in the transverse configuration it was found that the responsivity for the high energy peak was consistent with the calculated responsivity based on a bolometer mechanism for this detector. It was found that the negative magnetoresistance effect in InSb was not dependent upon the lattice temperature but only upon the electron temperature of the sample. A copy of a paper entitled 'Magnetooptical Studies of Solids Using Fourier Transform Spectroscopy' by R. Kaplan is included as an appendix.

Descriptors :   (*INFRARED DETECTORS, *SEMICONDUCTOR DEVICES), SOLID SOLUTIONS, CADMIUM ALLOYS, ZINC ALLOYS, ARSENIC ALLOYS, SINGLE CRYSTALS, EPITAXIAL GROWTH, CASTING, INDIUM ANTIMONIDES, DOPING, SELENIUM, CRYSTAL DETECTORS, SPECTROSCOPY, CRYOGENICS, GERMANIUM, PHOTOELECTRIC CELLS(SEMICONDUCTOR)

Subject Categories : Infrared Detection and Detectors
      Optics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE