Extraordinary reflection and transmission with direction dependent wavelength selectivity based on parity-time-symmetric multilayers

被引:48
作者
Ding, Shulin [1 ]
Wang, Guo Ping [1 ,2 ]
机构
[1] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
[2] Shenzhen Univ, Coll Elect Sci & Technol, Shenzhen 518060, Peoples R China
关键词
ANISOTROPIC MEDIUM; REFRACTIVE-INDEX; ISOTROPIC MEDIUM; LIGHT; PROPAGATION; SILICA;
D O I
10.1063/1.4905319
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this paper, we present a kind of periodical ternary parity-time (PT) -symmetric multilayers to realize nearly 100% reflectance and transmittance simultaneously when light is incident from a certain direction. This extraordinary reflection and transmission is original from unidirectional Bragg reflection of PT-symmetric systems as the symmetry spontaneous breaking happens at PT thresholds. The extra energy involved in reflection and transmission lights is obtained from pumping light to the gain regions of the structure. Moreover, we find that our PT-symmetric structure shows direction dependent wavelength selectivity. When the illumination light is incident from two opposite directions into the multilayer structure, such extraordinary reflection and transmission appear at visible and near-infrared wavelengths, respectively. Such distinguishing properties may provide these structures with attractive applications as beam splitters, laser mirrors, narrow band filters, and multiband PT-symmetric optical devices. (C) 2015 AIP Publishing LLC.
引用
收藏
页数:4
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