Wide angle and narrow-band asymmetric absorption in visible and near-infrared regime through lossy Bragg stacks

Shiwei Shu; Yawen Zhan; Chris Lee; Jian Lu; Yang Yang Li

doi:10.1038/srep27061

Author(s)

Shiwei Shu
Yawen Zhan
Chris Lee
Jian Lu
Yang Yang Li

Related Research Unit(s)

Detail(s)

Original language	English
Article number	27061
Journal / Publication	Scientific Reports
Volume	6
Online published	2 Jun 2016
Publication status	Published - 2016

Link(s)

DOI	DOI https://doi.org/10.1038/srep27061 Final Published version
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Attachment(s)	Documents 6998496.pdf Final Published version, 1.1 MB, PDF Publisher's Copyright Statement This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84973338405&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(df3d802c-c974-4119-bf6c-86a39be2749a).html

Abstract

Absorber is an important component in various optical devices. Here we report a novel type of asymmetric absorber in the visible and near-infrared spectrum which is based on lossy Bragg stacks. The lossy Bragg stacks can achieve near-perfect absorption at one side and high reflection at the other within the narrow bands (several nm) of resonance wavelengths, whereas display almost identical absorption/reflection responses for the rest of the spectrum. Meanwhile, this interesting wavelength-selective asymmetric absorption behavior persists for wide angles, does not depend on polarization, and can be ascribed to the lossy characteristics of the Bragg stacks. Moreover, interesting Fano resonance with easily tailorable peak profiles can be realized using the lossy Bragg stacks.