Terahertz Cavity Phonon Polaritons in the Deep-Strong Coupling Regime

Baydin, A and Manjappa, M and Mishra, SS and Xu, H and Doumani, J and Tay, F and Kim, D and Hernandez, FGG and Rappl, PHO and Abramof, E and Singh, R and Kono, J (2023) Terahertz Cavity Phonon Polaritons in the Deep-Strong Coupling Regime. In: 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023, 17 - 22 September 2023, Montreal.

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Abstract

We have studied the resonant and nonperturbative coupling of transverse optical phonons in lead telluride with photons in small-mode-volume terahertz cavities, observing a giant vacuum Rabi splitting on the order of the uncoupled phonon and cavity frequencies. Our terahertz time-domain spectroscopy experimental data, systematically collected as a function of sample thickness, temperature, and cavity length, can be well reproduced by our electromagnetic simulations. These results demonstrate that this uniquely tunable platform is promising for realizing and understanding predicted cavity-vacuum-induced ferroelectric instabilities, as well as for exploring applications of light-matter coupling in the ultra-and deep-strong coupling regimes in quantum technology. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Publisher:	IEEE Computer Society
Additional Information:	The copyright for this article belongs to IEEE Computer Society.
Keywords:	Lead compounds; Phonons; Photons; Terahertz spectroscopy; Terahertz waves, Cavity frequency; Mode volume; Nonperturbative; Phonon frequencies; Phonon polaritons; Strong-coupling regime; Terahertz cavity; Terahertz time-domain spectroscopy; Transverse optical phonons; Vacuum Rabi splitting, Electromagnetic simulation
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	01 Mar 2024 05:53
Last Modified:	01 Mar 2024 05:53
URI:	https://eprints.iisc.ac.in/id/eprint/83837

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