Abstract

N-color (Hg,Cd)Te photodetectors capable of spectral band analysis have been fabricated, tested, and delivered. This paper discusses the state of the art in (Hg,Cd)Te n-color photoconductive detectors. Included is a discussion of narrow band two-color devices responsive in the region of 8–14 μ. D*_λ (λ_p, 10 kHz, 1) higher than $3.5\times {10}^9\hspace{0.17em}\text{cm}\hspace{0.17em}{\text{Hz}}^{\frac{1}{2}}/\text{W}$ have been achieved in both top and bottom elements at 95 K. The top element exhibited a cutoff wavelength of 8.8 μ, while the bottom element was responsive from 9.6 μ to 11.1 μ. The device was assembled with a long-wavelength pass filter that yielded two narrow bands. Preliminary results are also included for a unique three-color (Hg,Cd)Te device with cutoff wavelengths of 9.1 μ, 10.8 μ, and 13.8 μ.

© 1972 Optical Society of America

Performance of S-192 (Hg,Cd)Te Arrays

N. C. Aldrich and J. D. Beck
Appl. Opt. 11(10) 2153-2156 (1972)

(Hg,Cd)Te Photodiode Laser Receivers for the 1–3-μ Spectral Region

D. A. Soderman and W. H. Pinkston
Appl. Opt. 11(10) 2162-2168 (1972)

Photon Effects in Hg₁₋x Cdx Te

Paul W. Kruse
Appl. Opt. 4(6) 687-692 (1965)

Calculations of Autoionizing d⁹s²np Levels in Zn i, Cd i, and Hg i

W. C. Martin, Jack Sugar, and Jack L. Tech
J. Opt. Soc. Am. 62(12) 1488-1492 (1972)

Initial Afterglow of the Self-Absorbed Hg 2537-Å Radiation from Hg + Ar Discharges

T. J. Hammond and C. F. Gallo
Appl. Opt. 11(4) 729-734 (1972)