Decay rates of a molecule in the vicinity of a spherical surface of an isotropic magnetodielectric material

H.Y. Chung, P.T. Leung, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


A comprehensive study is presented on the decay rates of excited molecules in the vicinity of a magnetodielectric material of spherical geometry via electrodynamic modeling. Both the models based on a driven-damped harmonic oscillator and on energy transfers will be applied so that the total decay rates can be rigorously decomposed into the radiative and the nonradiative rates. Clarifications of the equivalence of these two models for arbitrary geometry will be provided. Different possible orientations and locations of the molecule are studied with the molecule being placed near a spherical particle or a cavity. Among other results, TE modes are observed which can be manifested via nonradiative transfer from a tangential dipole within a small range of dissipation parameters set for the spherical particle. In addition, spectral analysis shows that decay rates at such a particle with small absorption are largely dominated by radiative transfer except at multipolar resonances when nonradiative transfer becomes prominent, and relatively unmodified decay is possible when negative refraction takes place. © 2012 American Physical Society.
Original languageEnglish
Article number155413
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
Publication statusPublished - 9 Oct 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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