Tunable cryogenic THz cavity for strong light-matter coupling in complex materials
Abstract
We report here the realization and commissioning of an experiment dedicated to the study of the optical properties of light matter hybrids constituted of crystalline samples embedded in an optical cavity. The experimental assembly developed offers the unique opportunity to study the weak and strong coupling regime between a tunable optical cavity in cryogenic environment and low energy degrees of freedom such as phonons, magnons or charge fluctuations. We describe here the setup developed which allows the positioning of crystalline samples in an optical cavity of different quality factor, the tuning of the cavity length at cryogenic temperatures and its optical characterization with a broadband time domain THz spectrometer (0.2-6 THz). We demonstrate the versatility of the setup by studying the vibrational strong coupling in CuGeO3 single crystal at cryogenic temperatures.
Cite
@article{arxiv.2112.01560,
title = {Tunable cryogenic THz cavity for strong light-matter coupling in complex materials},
author = {Giacomo Jarc and Shahla Yasmin Mathengattil and Francesca Giusti and Maurizio Barnaba and Abhishek Singh and Angela Montanaro and Filippo Glerean and Enrico Maria Rigoni and Simone Dal Zilio and Stephan Winnerl and Daniele Fausti},
journal= {arXiv preprint arXiv:2112.01560},
year = {2022}
}