Optical switching element based on layered nonlinear photonic crystal

Vyacheslav A. Trofimov; Alexey G. Volkov; Sheng Lan

doi:10.1117/12.860225

10 September 2010 Optical switching element based on layered nonlinear photonic crystal

Vyacheslav A. Trofimov, Alexey G. Volkov, Sheng Lan

Proceedings Volume 7756, Active Photonic Materials III; 77561B (2010) https://doi.org/10.1117/12.860225
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

We consider laser pulse propagation through the 2D nonlinear photonic structure or through the 1D layered nonlinear structure or though the homogeneous nonlinear plate. We have found out a self-formation of soliton if the intensity in focal waist of laser beam is greater than its critical value. In this case, the nonlinear localization of light energy inside the photonic crystal or the plate occurs. For 2D or 1D photonic structure the dependence of localized optical energy on the nonlinearity can be more monotonic in comparison with such dependence taking place for a nonlinear plate. Focusing of a laser beam in a medium and the properties of the photonic crystal has an influence on this dependence. Using the photonic crystal allows to realize the dependence, which is less sensitive to a fluctuation of the optical intensity in comparison with similar dependence for a homogeneous nonlinear plate The mode of unchanging of the beam profile on a transverse coordinate takes place after a passage of a longitudinal coordinate, at which a waist of focused laser beam achieves, if the intensity of the beam does not exceed some critical value. In this case a laser pulse propagates through the periodic structure in waveguide mode. Taking into account that for this mode the size of a beam is equal to transverse size of a photonic crystal layer one can easy to realize various channels of a transmission of laser energy. It may be important for the field of information technology. Similar mode of a propagation of a laser beam is absent for the homogeneous nonlinear plate. In this case the optical beam propagates without changing its transverse size. The results obtained can also be used for two-wave optical switching element that was proposed recently in [26] for an all-optical memory device.

Citation Download Citation

Vyacheslav A. Trofimov, Alexey G. Volkov, and Sheng Lan "Optical switching element based on layered nonlinear photonic crystal", Proc. SPIE 7756, Active Photonic Materials III, 77561B (10 September 2010); https://doi.org/10.1117/12.860225

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KEYWORDS

Photonic crystals

Pulsed laser operation

Solitons

Nonlinear optics

Dielectrics

Laser beam propagation

Nonlinear crystals

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