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Abstract <p>The statistical distributions of output signals and their derivatives have been investigated for a superconducting bolometer exposed to weak photon pulses at a frequency of 1 THz. The terahertz pulses were generated via strongly nondegenerate parametric down-conversion in a LiNbO<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({}_{3}\)</EquationSource> <!--BPhysMGU2570108Kuznetsov-m1--> </InlineEquation> crystal cooled to 4.8 K, under conditions of pumping the crystal with laser pulses of 28 ps duration. Various scenarios of the superconducting bolometer’s response to excitation by a small number of terahertz photons are discussed.</p>

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Detection of Pulsed Terahertz Radiation by a Superconducting Bolometer in the Process of Parametric Down-Conversion

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • K. A. Kuznetsov,
  • T. I. Novikova,
  • I. V. Pentin,
  • G. Kh. Kitaeva

摘要

Abstract

The statistical distributions of output signals and their derivatives have been investigated for a superconducting bolometer exposed to weak photon pulses at a frequency of 1 THz. The terahertz pulses were generated via strongly nondegenerate parametric down-conversion in a LiNbO \({}_{3}\) crystal cooled to 4.8 K, under conditions of pumping the crystal with laser pulses of 28 ps duration. Various scenarios of the superconducting bolometer’s response to excitation by a small number of terahertz photons are discussed.