DETECTOR INVESTIGATION FOR 8-15 AND 100-4000 MICRON REGIONS.
Semiannual technical summary rept. no. 22, 1 Jul-31 Dec 66,
NAVAL RESEARCH LAB WASHINGTON D C
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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.
- Infrared Detection and Detectors
- Solid State Physics