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Observation of energy transfer at optical frequency to an ultrathin silicon waveguide

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<mark>Journal publication date</mark>13/08/2020
<mark>Journal</mark>Optics Letters
Issue number16
Volume45
Number of pages4
Pages (from-to)4618-4621
Publication StatusPublished
Early online date16/07/20
<mark>Original language</mark>English

Abstract

Energy transfer from a submonolayer of rhodamine 6G molecules to a 130 nm thick crystalline silicon (Si) waveguide is investigated. The dependence of the fluorescence lifetime of rhodamine on its distance to the Si waveguide is characterized and modeled successfully by a classical dipole model. The energy transfer process could be regarded as photon tunneling into the Si waveguide via the evanescent waves. The experimentally observed tunneling rate is well described by an analytical expression obtained via a complex variable analysis in the complex wavenumber plane.

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© 2020 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.