Strong coupling in a microcavity containing β-carotene

Richard T. Grant, Rahul Jayaprakash, David M Coles, Andrew Musser, Simone De Liberato, Ifor D.W. Samuel, Graham A. Turnbull, Jenny Clark, David G. Lidzey

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We have fabricated an open-cavity microcavity structure containing a thin film of the biologically-derived molecule β-carotene. We show that the β-carotene absorption can be described in terms of a series of Lorentzian functions that approximate the 0-0, 0-1, 0-2, 0-3 and 0-4 electronic and vibronic transitions. On placing this molecular material into a microcavity, we obtain anti-crossing between the cavity mode and the 0-1 vibronic transition, however other electronic and vibronic transitions remain in the intermediate or weak-coupling regime due to their lower oscillator strength and broader linewidth. We discuss the consequences of strong-coupling for the possible modification of photosynthetic processes, or a re-ordering of allowed and optically-forbidden states.
Original languageEnglish
Pages (from-to)3320-3327
Number of pages8
JournalOptics Express
Issue number3
Publication statusPublished - 31 Jan 2018


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