Optical Review

, Volume 13, Issue 4, pp 292–296

Self-Modulation of Scattering Intensity from a Silica Sphere Coated with a Sol-Gel Film Doped with J-Aggregates

  • Kenzo Yamaguchi
  • Masamitsu Fujii
  • Tadanobu Niimi
  • Masanobu Haraguchi
  • Toshihiro Okamoto
  • Masuo Fukui
Special Section: The 5th Asia-Pacific Conference on Near-Field Optics

DOI: 10.1007/s10043-006-0292-2

Cite this article as:
Yamaguchi, K., Fujii, M., Niimi, T. et al. OPT REV (2006) 13: 292. doi:10.1007/s10043-006-0292-2

Abstract

A micrometer-sized nonlinear optical resonator constituted of a silica microsphere coated with J-aggregates has been fabricated by the sol-gel process. We determined the scattering light spectrum and discuss the application of the observed effect for the realization of an optical switching element. Optical evaluation of the sphere has been performed in the attenuated-total-reflection (ATR) configuration. We excited a whispering gallery mode and measured the nonlinear ATR signal dependence on excitation intensity. The experimental result agrees very well with the simulation results obtained using the Mie theory and the finite-difference time-domain method taking into account optical Kerr nonlinearity. The permittivity of the film of J-aggregates was measured by ATR method at several wavelengths and the value at the desired wavelength was determined by extrapolation using the Lorentz function.

Key words

optical switchingoptical Kerr nonlinearitywhispering gallery modeJ-aggregatesmicrosphereFDTD method

Copyright information

© The Optical Society of Japan 2006

Authors and Affiliations

  • Kenzo Yamaguchi
    • 2
  • Masamitsu Fujii
    • 1
  • Tadanobu Niimi
    • 2
  • Masanobu Haraguchi
    • 2
  • Toshihiro Okamoto
    • 2
  • Masuo Fukui
    • 2
  1. 1.Department of Electronics and MechanicsToba National College of Maritime TechnologyToba, MieJapan
  2. 2.Department of Optical Science and TechnologyFaculty of Engineering, Univerity of TokushimaTokushimaJapan