Band structure and reflectance for a nonlinear one-dimensional photonic crystal

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• 作者：S. Gutié ; rrez-Ló ; pez^a ; A. Castellanos-Moreno^a ; A. Corella-Madueñ ; o^a ; ^{acorella@correo.fisica.uson.mx} ; R.A. Rosas^a ; J.A. Reyes^b
• 关键词：Nonlinear photonic crystal ; Optical solitons ; Liquid crystals ; Photonic bandgap
• 刊名：Optics Communications
• 出版年：2012
• 期刊代码：50_00304018
• 类别：ph
• 出版时间：1 May, 2012
• 卷：285
• 期：9
• 页码：2439-2444
• 文件大小：709 K

摘要

We consider a model for a one-dimensional photonic crystal formed by a succession of nonlinear Kerr-type equidistant spaceless interfaces immersed in a linear medium. We calculate analytically the band structure of this system as a function of the incident wave intensity, and find two main tendencies: the appearance of prohibited bands, and the separation and narrowing of these bands. We consider as well a finite version of this photonic crystal for a limited number of alternating linear and non linear set of stacks for which we calculate reflectance as a function of the electromagnetic wave intensity, band index and number of periods. A system with these features can be constructed by alternating very thin slabs of a nonlinear soft matter material with thicker solid films, which can be used to design a device to control light propagation for specific wavelength intervals and light intensities of the same propagating signal.