Abstract
A short review of theoretical and experimental studies concerning the photo‐excited florescence and Raman scattering of light for a substance in a space containing small material bodies is presented. Calculations of the radiative‐transition probability for atoms (molecules) in the vicinity of bodies with a size much smaller than the light wavelength are performed. The probabilities of the single‐photon and double‐photon transitions are shown to increase by factors of 9 and 81 in the vicinity of a nanosize sphere with dielectric constant |ɛ|\≫ 1. The probability of a radiative transition in the vicinity of the vertex of a conic needle bearing up against a plane (both with |ɛ|≫ 1) increases by factors of (λ/R in)2 and (λ/R in)4 for single‐photon and double‐photon transitions, respectively (R in is the curvature radius for the needle vertex). This theoretical result is suggested as an explanation of the effect of increasing the radiation process intensity in the experiments carried out in the studies cited below.
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Frantsesson, A.V., Zuev, V.S. On the Effect of Increasing the Radiative-Transition Rate Near a Nanosize Point. Journal of Russian Laser Research 22, 437–454 (2001). https://doi.org/10.1023/A:1012893420997
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DOI: https://doi.org/10.1023/A:1012893420997