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Description:

We demonstrate controlled squeezing of visible light waves into nanometer-sized optical cavities. The light is perpendicularly confined in a few-nanometer-thick SiO2 film sandwiched between Au claddings in the form of surface plasmon polaritons and exhibits Fabry-Perot resonances in a longitudinal direction. As the thickness of the dielectric core is reduced, the plasmon wavelength becomes shorter; then a smaller cavity is realized. A dispersion relation down to a surface plasmon wavelength of 51 nm for a red light, which is less than 8% of the free-space wavelength, was experimentally observed. Any obvious breakdowns of the macroscopic electromagnetics based on continuous dielectric media were not disclosed for 3-nm-thick cores.

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Keyword: プラズモニクス, plasmonics, プラズモン共振器, plasmon cavities, プラズモン共鳴, plasmon resonance

Date published: 2006-03-07

Publisher: American Physical Society

Journal:

• Physical Review Letters (ISSN: 10797114) 097401

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevlett.96.097401

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Updated at: 2024-01-05 22:13:27 +0900

Published on MDR: 2023-04-28 10:16:18 +0900