![]() ![]() ![]() Here we experimentally investigate the coupling between a Fabry–Perot cavity and the carbonyl stretch at an infrared frequency near 1730 cm –1 in polymethyl methacrylate. However, only very recently have vibrational transitions been considered. Such systems have been widely investigated for electronic-state transitions such as molecular excitons coupled to surface-plasmons and optical microcavities. The coherent coupling between an optical transition and a confined optical mode, when sufficiently strong, gives rise to a new pair of mixed modes separated in frequency by the vacuum Rabi splitting.
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