What question did this study set out to answer?

The aim is to measure the resonant photoreflectance signal in a GaAs quantum well using a two-color pump-probe method.

April 16, 2026Bulletin of the Russian Academy of Sciences Physics0 citations

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

ALA. V. LarionovOsipyan Institute of Solid State Physics RAS LKL. V. KulikOsipyan Institute of Solid State Physics RAS

Key Points

The aim is to measure the resonant photoreflectance signal in a GaAs quantum well using a two-color pump-probe method.
Used two-color laser excitation for photoreflectance measurement
Applied pump-probe geometry
Focused on two-dimensional electrons at a fractional filling factor of ν = 1/3
Conducted experiments at helium temperatures around 0.6 K
Successfully measured relaxation times of excitations in the Laughlin liquid
Found relaxation times on the order of hundreds of seconds

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.

Ask AI

Helpful

Bookmark

View Full Paper