Open AccessQuasiperiodic metamaterials empowered non-metallic broadband optical absorbers
Author(s) -
Chao Dong,
Kesheng Shen,
Yun Zheng,
HongChao Liu,
Zhang Jun,
Shiqiang Xia,
Feng Wu,
Hai Lu,
Xianzhou Zhang,
Yufang Liu
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.423353
Subject(s) - metamaterial , materials science , optics , planar , broadband , molar absorptivity , polarization (electrochemistry) , optoelectronics , optical coating , dielectric , thin film , computer science , nanotechnology , physics , chemistry , computer graphics (images)
Realizing a polarization-insensitive broadband optical absorber plays a key role in the implementation of microstructure optoelectrical devices with on-demand functionalities. However, the challenge is that most of these devices involve the constituent metals, thus suffering from poor chemical and thermal stability and a complicated manufacturing process. In addition, the extreme contrast between the negative (metallic) and positive (dielectric) real parts of the constituent permittivities can cause additional problems in the design of structural devices. Based on these facts, this work proposes a design of planar broadband one-dimensional structure based on Fibonacci geometry. Experimental results show that the proposed planar structure exhibits high absorptivity behavior independent of polarization and angle in the wavelength range of 300-1000 nm. The absorptivity remains more than 80% when the incident angle is 60°. This proof-of-concept represents a new strategy for realizing non-metallic broadband optical absorbers with advantages of polarization-independence, low-cost, and wide-field-of-view and paves the way for light manipulation under harsh conditions.