4.6 Article

Hybridization of photon-plasmon modes in metal-coated microtubular cavities

期刊

PHYSICAL REVIEW A
卷 94, 期 1, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.013832

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资金

  1. Volkswagen Foundation [I/84072]
  2. DFG [FOR 1713]
  3. China Scholarship Council [201206090008]

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The coupling of resonant light and surface plasmons in metal layer-coated optical microcavities results in the formation of hybrid photon-plasmon modes. Here, we comprehensively investigate the hybridization mechanism of photon-plasmon modes based on optoplasmonic microtubular cavities. By changing the thicknesses of both the cavity wall and the metal layer, weakly, moderately, and strongly hybridized resonant modes are demonstrated depending on the photon-plasmon coupling strength. An effective potential approach is applied to illustrate the hybridization of photon-plasmon modes relying on the competition between light confinement by the cavity wall and the potential barrier introduced by the metal layer. Our work reveals the basic physical mechanisms for the generation of hybrid modes in metal-coated whispering-gallery-mode microcavities, and is of importance for the study of enhanced light-matter interactions and potential sensing applications.

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