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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 8,
  • Issue 1,
  • pp. 6-12
  • (2004)

Bragg Gratings Generated by Coupling of Surface Plasmons Induced on Metal N anoparticles

Open Access Open Access

Abstract

Diffraction Bragg gratings consisting of metal (silver) nanoparticles are generated inside a soda-lime glass substrate. After ion-exchanging and annealing processes in the glass, the silver nanoparticles are first formed with the particle diameters of 10 nm ∼ 30 nm. By interfering two CW laser beams at ∼ 60 <TEX>${\mu}{\textrm}{m}$</TEX> deep under the surface of the nanoparticles-dispersed glass, Bragg gratings with thickness of 15 <TEX>${\mu}{\textrm}{m}$</TEX> and period of 3.5 <TEX>${\mu}{\textrm}{m}$</TEX> are generated. Diffraction efficiency of the gratings formed by two TE-polarized beams is three times higher than that by two TM-polarized beams. From this polarization dependence, we have found that strong coupling of the surface plasmons induced on the metal particles may contribute dominantly to generate the diffraction grating.

© 2004 Optical Society of Korea

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