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Abstract <p>This paper presents a correlator for constructing the second-order autocorrelation function <i>g</i><sup>(2)</sup>(τ), implemented on a field-programmable gate array (FPGA). The device is designed for high-precision recording of time intervals between photons detected from single emitters. The use of an FPGA makes it possible to achieve a time resolution of 185 ps and real-time event processing. Experimental data confirming the achievement of photon antibunching with <i>g</i><sup>(2)</sup>(0) &lt; 0.5, characteristic of single quantum emitters, are demonstrated. The device can be used to analyze photon correlations in quantum optics problems and when working with single quantum emitters.</p>

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Development of a Correlator for Measuring the Second-Order Autocorrelation Function of Single Photon Sources

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. T. Salkazanov,
  • A. S. Gusev,
  • N. I. Kargin,
  • M. M. Kaloshin,
  • V. A. Klokov,
  • T. A. Kosogorova,
  • R. E. Margushin,
  • A. D. Sauri,
  • A. A. Sychev,
  • S. S. Vergeles

摘要

Abstract

This paper presents a correlator for constructing the second-order autocorrelation function g(2)(τ), implemented on a field-programmable gate array (FPGA). The device is designed for high-precision recording of time intervals between photons detected from single emitters. The use of an FPGA makes it possible to achieve a time resolution of 185 ps and real-time event processing. Experimental data confirming the achievement of photon antibunching with g(2)(0) < 0.5, characteristic of single quantum emitters, are demonstrated. The device can be used to analyze photon correlations in quantum optics problems and when working with single quantum emitters.