Active control of the strong coupling regime between porphyrin excitons and surface plasmon polaritons

A. Berrier, R. Cools, C. Arnold, P. Offermans, M. Crego-Calama, S.H. Brongersma, J. Gómez Rivas

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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Samenvatting

We experimentally demonstrate the active control of the coupling strength between porphyrin dyes and surface plasmon polaritons supported by a thin gold layer. This control is externally exerted by a gas flow and is reversible. The hybridized exciton–polariton branches resulting from the exciton–plasmon coupling display a splitting proportional to the coupling strength of the light–matter interaction. The coupled system changes from the weak (no splitting) to the strong coupling regime (splitting of 130 meV) by controlling the effective oscillator strength in the dye layer, via exposure to nitrogen dioxide. The modification of the coupling strength of the system allows tailoring of the dispersion of the hybridized modes as well as of their group velocity.
Originele taal-2Engels
Pagina's (van-tot)6226-6232
TijdschriftACS Nano
Volume5
Nummer van het tijdschrift8
DOI's
StatusGepubliceerd - 2011

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