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Tunable cryogenic terahertz cavity for strong light-matter coupling in complex materials. | LitMetric

AI Article Synopsis

  • The report discusses a new experimental setup designed to investigate the optical properties of light-matter hybrids using crystalline samples in an optical cavity.
  • This setup enables the examination of weak and strong coupling regimes at cryogenic temperatures, focusing on low energy interactions like phonons and magnons.
  • The versatility of the apparatus is illustrated through the study of vibrational strong coupling in a CuGeO single crystal using a broadband THz spectrometer for optical characterization.

Article 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 regimes 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 that allows for the positioning of crystalline samples in an optical cavity of different quality factors, 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 CuGeO single crystal at cryogenic temperatures.

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Source
http://dx.doi.org/10.1063/5.0080045DOI Listing

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