Some n-p (Hg,Cd)Te photodiodes for 8-14 micrometer heterodyne applications

Details Some n-p (Hg,Cd)Te photodiodes for 8-14 micrometer heterodyne applications Some n-p (Hg,Cd)Te photodiodes for 8-14 micrometer heterodyne applications

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980hst..rept..263s&link_type=abstract

In NASA. Langley Res. Center Heterodyne Systems and Technol., Pt. 2 p 263-280 (SEE N80-29672 20-36)

Astronomy and Astrophysics

Astronomy

Cadmium, Mercury (Metal), Optical Heterodyning, Photodiodes, Tellurium, Astronomy, Carbon Dioxide, Semiconductor Devices, Signal To Noise Ratios

Scientific paper

The results describing the dc and CO2 laser heterodyne characteristics of a three element photodiode array and single element and four element photodiode arrays are presented. The measured data shows that the n(+)-p configuration is capable of achieving bandwidths of 475 to 725 MHz and noise equivalent powers of 3.2 x 10 to the minus 20th power W/Hz at 77 K and 1.0 x 10 to the minus 19th power W/Hz at 145 K. The n(+)-n(-)-p photodiodes exhibited wide bandwidths (approximately 2.0 GHz) and fairly good effective heterodyne quantum efficiencies (approximately 13-30 percent at 2.0 GHz). Noise equivalent powers ranging from 1.44 x 10 to the minus 19th power W/Hz to 6.23 x 10 to the minus 20th power W/Hz were measured at 2.0 GHz.

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