Multi-dimensional laser spectroscopy of exciton-polaritons with spatial light modulators

TL;DR

This paper presents an experimental setup using two spatial light modulators to precisely and flexibly control the excitation of exciton-polaritons in a microcavity, enabling detailed dispersion measurements.

Contribution

The novel use of dual spatial light modulators allows rapid, accurate, and reconfigurable excitation of multiple exciton-polariton states in a microcavity.

Findings

Precise access to exciton-polariton dispersion curves.

High-speed reconfiguration of excitation schemes.

Ability to excite multiple states simultaneously.

Abstract

We describe an experimental system that allows one to easily access the dispersion curve of exciton-polaritons in a microcavity. Our approach is based on two spatial light modulators (SLM), one for changing the excitation angles (momenta), and the other for tuning the excitation wavelength. We show that with this setup, an arbitrary number of states can be excited accurately and that re-configuration of the excitation scheme can be done at high speed.