Simulations of optical switching effects of a guided-mode resonant grating filter with a Kerr medium

Akio Mizutani; Hisao Kikuta; Koichi Iwata

doi:10.1117/12.506687

29 December 2003 Simulations of optical switching effects of a guided-mode resonant grating filter with a Kerr medium

Akio Mizutani, Hisao Kikuta, Koichi Iwata

Proceedings Volume 5184, Physics, Theory, and Applications of Periodic Structures in Optics II; (2003) https://doi.org/10.1117/12.506687
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We propose an optical switch of a guided-mode resonant grating (GMRG) filter with a Kerr medium and simulate optical switching effects by using the nonlinear finite differential time domain (FDTD) method. It is shown that the nonlinear FDTD method is needed for simulating the optical switch effect by analyzing the bistable feature. The doubly periodic structure was used in order to produce the optical Kerr effect efficiently. Because a doubly periodic GMRG filter operates for small beam diameter and grating area, the electric field can be accumulated to the small area. The doubly periodic grating consisted of materials with refractive indices of 1.88 and 1.0, and the material of index 1.88 had a third-order susceptibility of 8.5×10^-10esu. The TE polarized plane waves were normally incident on the grating structure as “pump light” and “probe light.” When the intensity of “pump light” increases, the refractive index changes due to the optical Kerr effect, so that the resonant condition of the GMRG filter for the “probe light” also changes. Therefore the transmittance of “probe light” can be controlled by the “pump light.” By changing “pump light” from 0 to 100kW/mm², the transmittance of “probe light” was controllable from 0 to 0.6.

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Akio Mizutani, Hisao Kikuta, and Koichi Iwata "Simulations of optical switching effects of a guided-mode resonant grating filter with a Kerr medium", Proc. SPIE 5184, Physics, Theory, and Applications of Periodic Structures in Optics II, (29 December 2003); https://doi.org/10.1117/12.506687

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KEYWORDS

Reflectivity

Optical filters

Optical switching

Nonlinear filtering

Waveguides

Finite-difference time-domain method

Refractive index

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