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

被引：7
|
作者：
Shu, Shiwei [1 ,2 ,3 ]
Zhan, Yawen [1 ,2 ]
Lee, Chris [1 ,2 ]
Lu, Jian [3 ,4 ]
Li, Yang Yang [1 ,2 ,3 ]
机构：
[1] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Phys & Mat Sci, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Shenzhen Res Inst, 8 Yuexing 1st Rd, Shenzhen, Peoples R China
[4] City Univ Hong Kong, Dept Mech & Biol Engn, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
中国国家自然科学基金;
关键词：
PERFECT ABSORBER; LIGHT; EMISSION; COATINGS; GROWTH;
D O I：
10.1038/srep27061
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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.
引用
收藏
页数：8
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