2016/01/08 by V. S. Babichenko, M. I. Gozman, Babichenko, V. S. +16
Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Nonlinear Photonic Systems #Photonic Crystals and Applications #Photonic and Optical Devices #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1601.01826
arXiv admin note: substantial text overlap with arXiv:1501.06476
arxiv created 2016/01/08 · openalex publication_date 2016/01/08 · arxiv updated 2016/01/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the optical beam behavior in the periodical array of the coupled optical waveguides with the monotonic change of the refractive index in the transverse direction. We consider the dependence of the form of the optical beam on the boundary conditions. It is well known that if the input wave packet is wide enough, the optical Bloch oscillations occur, while for the enough narrow input wave packet the breathing mode is observed. We show that if the input wave packet is neither too wide nor too narrow, the optical beam takes a peculiar form which can be considered neither as the Bloch oscillations nor as the breathing mode. We qualitatively explain the transformation of this intermediate form of the optical beam when the width of the input wave packet changes.