Journal article
Quantum yield of polariton emission from hybrid light-matter states
S Wang, T Chervy, J George, JA Hutchison, C Genet, TW Ebbesen
Journal of Physical Chemistry Letters | Published : 2014
DOI: 10.1021/jz5004439
Abstract
The efficiency of light-matter strong coupling is tuned by precisely varying the spatial position of a thin layer of cyanine dye J-aggregates in Fabry-Perot microcavities, and their photophysical properties are determined. Placing the layer at the cavity field maximum affords an interaction energy (Rabi splitting) of 503 meV, a 62% increase over that observed if the aggregates are simply spread evenly through the cavity, placing the system in the ultrastrong coupling regime. The fluorescence quantum yield of the lowest polaritonic state P- integrated over k-space is found to be ∼10 -2. The same value can be deduced from the 1.4 ps lifetime of P- measured by femtosecond transient absorption s..
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Awarded by ERC
Awarded by ANR Equipex "Union"
Awarded by Labex NIE projects within the Investissement d'Avenir program
Funding Acknowledgements
This work was partially supported by the ERC "Plasmonics" no. 22577, the ANR Equipex "Union" (ANR-10-EQPX-52-01), and the Labex NIE projects (ANR-11-LABX-0058_NIE) within the Investissement d'Avenir program ANR-10-IDEX-0002-02. We thank Chien-Wei Hsu for the absolute QY measurement and R. Voltz for reminding us of the long-lived excimers. SW. acknowledges the personal support from the Chinese Scholarship Council (CSC).