Multiple vibro-polaritons formation from a thin polyethylene film embedded in a resonant mid-infrared cavity

Abstract

We experimentally resolve the dispersion of multiple vibro-polariton modes issued from the strong coupling of different vibrational bands of the methylene group (CH2) in a 2.56$\mu$m thick polyethylene film with the confined modes of a mid-infrared Fabry-Perot micro-cavity. We measure a Rabi frequency of 111 cm${}^{-1}$ for the stretching doublet around 2950 cm${}^{-1}$ and a Rabi frequency of 29 cm${}^{-1}$ for the scissoring doublet around 1460 cm${}^{-1}$. This simple experimental approach offers the possibility to accurately fit the measured molecular film dielectric function. We show that the polariton dispersion and Rabi splitting can be precisely predicted from numerical simulations, offering a valuable tool for the design of strongly coupled system and the development of novel molecular films with crystalline organization.

arXiv commentCopyright 2021 Mario Malerba, Mathieu Jeannin, Paul Goulain, Adel Bousseksou, Raffaele Colombelli, Jean-Michel Manceau. This article is distributed under a Creative Commons Attribution (CC BY) License. The following article has been submitted to APL Photonics. After it is published, it will be found at https://aip.scitation.org/journal/app

References in corpus (8)

• Conductivity in organic semiconductors hybridized with the vacuum field
• Coherent coupling of molecular resonators with a micro-cavity mode
• Strong Coupling of Light to Collective Terahertz Vibrations in Organic Materials
• Vibrational Coupling to Epsilon-Near-Zero Waveguide Modes
• Enhancing vibrational light-matter coupling strength beyond the molecular concentration limit using plasmonic arrays
• Exploiting vibrational strong coupling to make an optical parametric oscillator out of a Raman laser
• Mid-Infrared intersubband polaritons in dispersive metal-insulator-metal resonators
• Strong coupling between weakly guided semiconductor nanowire modes and an organic dye