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Abstract <p>The resonant photoreflectance signal was measured by the two-color pump–probe method at a fractional filling factor of two-dimensional electrons of ν = 1/3 in a GaAs quantum well at helium temperatures of <i>T</i> ~ 0.6&#xa0;K. It was demonstrated that the modified pump–probe method can measure the relaxation times of excitations in the Laughlin liquid on the order of hundreds of seconds.</p>

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Method for Measuring the Resonant Photoreflectance Signal Using Two-Color Laser Excitation in the Pump–Probe Geometry

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • A. V. Larionov,
  • L. V. Kulik

摘要

Abstract

The resonant photoreflectance signal was measured by the two-color pump–probe method at a fractional filling factor of two-dimensional electrons of ν = 1/3 in a GaAs quantum well at helium temperatures of T ~ 0.6 K. It was demonstrated that the modified pump–probe method can measure the relaxation times of excitations in the Laughlin liquid on the order of hundreds of seconds.