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Purcell-Enhanced Spontaneous Emission of Molecular Vibrations.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Purcell-Enhanced Spontaneous Emission of Molecular Vibrations."

Infrared (IR) spectroscopy of molecular vibrations provides insight into molecular structure, coupling, and dynamics. However, picosecond scale intermolecular and intramolecular many-body interactions, nonradiative relaxation, absorption, and thermalization typically dominate over IR spontaneous emission. We demonstrate how coupling to a resonant IR antenna can enhance spontaneous emission of molecular vibrations. Using time-domain nanoprobe spectroscopy we observe an up to 50% decrease in vibrational dephasing time T_{2,vib}, based on the coupling-induced population decay with T_{κ}≃550  fs and an associated Purcell factor of >10^{6}. This rate enhancement of the spontaneous emission of antenna-coupled molecular vibrations opens new avenues for IR coherent control, quantum information processing, and quantum chemistry.

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This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 153001

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