Cryogenic photodetector with variable spectral characteristics
https://doi.org/10.34680/2076-8052.2022.3(128).75-77
Abstract
A description is given of the design of a photodetector containing two back-to-back photodiodes. One of them is located on the illuminated side of the crystal, and the second one is on the back side. In the circuit of the first photodiode, it is proposed to use a connected additional external resistance. With the resistance turned off, the photodetector had a broadband spectral characteristic. The connection of an external resistance changed the broadband response to a selective one. Signal suppression in the short-wave region was due to its compensation by the back-to-back voltage across the bulk resistance of the base region. The high efficiency of suppression of short-wave radiation is shown by the example of a cryogenic InSb photodetector. In the selective mode of operation with a closed key, the short-wave signal was observed to be attenuated by almost 103 times compared to the broadband mode with an open key.
About the Authors
E. A. Arias
Новгородский государственный университет имени Ярослава Мудрого
Russian Federation
Russian Federation
V. V. Gavrushko
Новгородский государственный университет имени Ярослава Мудрого
Russian Federation
Russian Federation
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Review
For citations:
Arias E.A., Gavrushko V.V. Cryogenic photodetector with variable spectral characteristics. Title in english. 2022;(3(128)):75-77. (In Russ.) https://doi.org/10.34680/2076-8052.2022.3(128).75-77
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