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

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.
Authors:
 [1] ;  [1] ;  [2]
  1. School of Physics and Technology, Wuhan University, Wuhan 430072 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22412802
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BRAGG REFLECTION; FILTERS; GAIN; ILLUMINANCE; LASER MIRRORS; LAYERS; LIGHT TRANSMISSION; P INVARIANCE; PERIODICITY; PUMPING; SYMMETRY; T INVARIANCE; VISIBLE RADIATION