Nonlinear beam deflection in photonic lattices with negative defects
نویسندگان
چکیده
Jiandong Wang,1 Zhuoyi Ye,2 Alexandra Miller,3 Yi Hu,2,3 Cibo Lou,2 Peng Zhang,3 Zhigang Chen,2,3 and Jianke Yang4,* 1College of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China 2TEDA Applied Physical School, Nankai University, Tianjin 300457, China 3Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, USA 4Department of Mathematics and Statistics, University of Vermont, Burlington, Vermont 05401, USA (Received 7 February 2011; published 31 March 2011)
منابع مشابه
Optically-induced reconfigurable photonic lattices for linear and nonlinear control of light
Linear and nonlinear periodic systems are abundant in nature. In optics, a typical example is a closelyspaced waveguide array, in which collective behavior of wave propagation exhibits many intriguing phenomena that have no counterpart in homogeneous media. Even in a linear waveguide array, the diffraction property of a light beam changes due to evanescent Correspondence/Reprint request: Dr. Zh...
متن کاملDirectivity enhancement and deflection of the beam emitted from a photonic crystal waveguide via defect coupling.
We experimentally and numerically investigate the spatial distribution of the emission from a photonic crystal waveguide, coupled with defects, that are located at the output edge. Two defects that are located symmetrically enhance the directivity of the beam compared to that of a plain waveguide, as was reported in recently conducted theoretical work. We further demonstrate that a single defec...
متن کاملDefect modes in one-dimensional photonic lattices.
Linear defect modes in one-dimensional photonic lattices are studied theoretically. For negative (repulsive) defects, various localized defect modes are found. The strongest confinement of the defect modes appears when the lattice intensity at the defect site is nonzero rather than zero. When launched at small angles into such a defect site of the lattice, a Gaussian beam can be trapped and und...
متن کاملThe effect of material nonlinearity on the band gap for TE and TM modes in square and triangular lattices
In this article, by using the method of finite difference time domain (FDTD) and PML boundary conditions, we have studied the photonic band gaps for TE and TM modes in square and triangular lattices consisting of air holes in dielectric medium and compared the results. In addition, the effect of nonlinearity of the photonic crystal background on the photonic band gaps and comparison with the re...
متن کاملLight localization and nonlinear beam transmission in specular amorphous photonic lattices.
We demonstrate specular photonic "lattices" with random index variations at disordered positions of lattice sites. These amorphous lattice structures, optically induced in a bulk nonlinear crystal, remain invariant during propagation since they are constructed from random components residing on a fixed ring in momentum space. We observe linear spatial localization of a light beam when probing t...
متن کامل