標題: Incomplete immunity to backscattering in chiral one-way photonic crystals
作者: Cheng, Pi-Ju
Tien, Chung-Hao
Chang, Shu-Wei
光電工程學系
Department of Photonics
公開日期: 20-四月-2015
摘要: We show that the propagating modes in a strongly-guided chiral one-way photonic crystal are not backscattering-immune even though they are indeed insensitive to many kinds of scatters. Since these modes are not protected by the nonreciprocity, the backscattering does occur under certain circumstances. We use a perturbative method to derive criteria for the prominent backscattering in such chiral structures. From both our theory and numerical examinations, we find that the amount of backscattering critically depends on the symmetry of scatters. Additionally, for these chiral photonic modes, disturbances at the most intense parts of field profiles do not necessarily lead to the most effective backscattering. (C) 2015 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.23.010327
http://hdl.handle.net/11536/124672
ISSN: 1094-4087
DOI: 10.1364/OE.23.010327
期刊: OPTICS EXPRESS
Volume: 23
起始頁: 10327
結束頁: 10340
顯示於類別:期刊論文