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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 48, Iss. 7 — Jul. 1, 1958
  • pp: 468–473

High-Sensitivity Crystal Infrared Detectors

M. E. LASSER, P. CHOLET, and E. C. WURST, JR.  »View Author Affiliations


JOSA, Vol. 48, Issue 7, pp. 468-473 (1958)
http://dx.doi.org/10.1364/JOSA.48.000468


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Abstract

Germanium infrared detectors are cut from a large zone leveled crystal. Compensation with antimony donors is used to obtain n-type material. The gold-antimony doped detectors have a long wavelength cutoff at 6 microns and a photoconductive time constant which is dependent on the wavelength of the incident radiation. A table is given which shows the sensitivity characteristics of a number of these detectors. Indium antimonide detectors have been made with sensitivities comparable to those of the gold-doped germanium. The indium antimonide detector is made either by alloying or diffusing a thin layer of impurities into the surface layer of a single crystal of material. Cadmium is presently being used, giving a thin p-type surface on n-type indium antimonide. If light is allowed to fall on the front surface of the alloyed material, a photo-voltage may be measured between the n and p parts of the detector. The cutoff wavelength for this type of detector when cooled to liquid nitrogen temperature also is of the or der of 6 microns.

A comparison is made between the characteristics of the two types of cells and a description is given of a multiple contact cell which can locate a target as well as detect it. A section is included on the standard measuring techniques used in evaluating infrared detectors.

Citation
M. E. LASSER, P. CHOLET, and E. C. WURST, JR., "High-Sensitivity Crystal Infrared Detectors," J. Opt. Soc. Am. 48, 468-473 (1958)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-48-7-468


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References

  1. T. S. Moss, Proc. Inst. Radio Engrs. 43, 1869 (1955).
  2. M. L. Schultz and G. A. Morton, Proc. Inst. Radio Engrs. 43, 1819 (1955).
  3. Mitchel, Goldberg, and Kurnick, Phys. Rev. 97, 239 (1955).
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  7. Garbuny, Vogl, and Hansen, Rev. Sci. Instr. 28, 826 (1957).
  8. W. C. Dash and R. Newman, Phys. Rev. 99, 1153 (1955).
  9. H. Levinstein et al., Final report; Germanium and Lead Telluride Infrared Detectors (Syracuse University Department of Physics Solid-State, Syracuse University Research Institute, Syracuse, New York, February 1, 1957).
  10. Smith, Jones, and Chasmar, The Detection and Measurement of Infrared Radiation (Oxford University Press, New York, 1957).
  11. A photovoltaic germanium detector with similar characteristics has been reported by J. T. Wallmark, Proc. Inst. Radio Engrs. 45, 474 (1957).

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