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A Preamplifier for a CdHgTe Photodetector

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Abstract

A preamplifier for operation with an HgCdTe-based nitrogen-cooled IR photodetector (600 nm–15 μm) is described. The preamplifier operates in the photoconductivity mode. The use of modern microcircuits made it possible to increase the bandwidth of the response to 2 MHz at a noise level of 0.5 nV/Hz1/2, which is close to the fundamental limit that is specified by the resistance of the photosensitive element. The preamplifier was used in an aperture-free scanning near-field optical microscope.

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Funding

The development and manufacture of a low-noise high-speed signal preamplifier for the MCT photodetector was supported by the Russian Foundation for Basic Research, project no. 18-29-20122 within the framework of the project of AFSNOM studies of semiconductor surfaces.

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Authors and Affiliations

  1. Alikhanov Institute of Theoretical and Experimental Physics, 117259, Moscow, Russia

    D. V. Kazantsev

  2. Moscow State Geological Prospecting Academy (MGPA), 117997, Moscow, Russia

    D. V. Kazantsev

  3. Moscow Technological University MIREA, 119454, Moscow, Russia

    E. A. Kazantseva

Authors
  1. D. V. Kazantsev
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  2. E. A. Kazantseva
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Correspondence to D. V. Kazantsev.

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Translated by A. Seferov

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Kazantsev, D.V., Kazantseva, E.A. A Preamplifier for a CdHgTe Photodetector. Instrum Exp Tech 63, 133–138 (2020). https://doi.org/10.1134/S0020441220010194

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