Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 27, Pages 7971-7975Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201502979
Keywords
optical cavity; Raman scattering; strong coupling; vibrations; vibro-polariton states
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Funding
- ERC Plasmonics [22577]
- ANR Equipex Union [ANR-10-EQPX-52-01]
- Labex NIE [ANR-11-LABX-0058_NIE]
- USIAS within the Investissement d'Avenir program [ANR-10-IDEX-0002-02]
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Ground-state molecular vibrations can be hybridized through strong coupling with the vacuum field of a cavity optical mode in the infrared region, leading to the formation of two new coherent vibro-polariton states. The spontaneous Raman scattering from such hybridized light-matter states was studied, showing that the collective Rabi splitting occurs at the level of a single selected bond. Moreover, the coherent nature of the vibro-polariton states boosts the Raman scattering cross-section by two to three orders of magnitude, revealing a new enhancement mechanism as a result of vibrational strong coupling. This observation has fundamental consequences for the understanding of light-molecule strong coupling and for molecular science.
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