Abstract

In this paper, we propose a broadband omnidirectional near-perfect absorber that transforms light energy into heat. In contrast to previous research on structural metamaterials, this study focuses on light absorption in the epsilon-near-zero (ENZ) layers without any structural patterns. Chromium (Cr) thin films were applied as ENZ layers. Using the admittance method, we found the proper thicknesses of ${\rm SiO}_2$ layers to match the incident medium and achieve perfect absorption. Also, the absorber is angular insensitive up to 60°. The temperature of the absorber increases from room temperature to 42°C, which is 4°C higher than the uncoated substrate at 38°C, after exposure to sunlight for 20 min.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Broadband perfect infrared absorption by tuning epsilon-near-zero and epsilon-near-pole resonances of multilayer ITO nanowires

Kun Zhou, Qiang Cheng, Jinlin Song, Lu Lu, Zhihao Jia, and Junwei Li
Appl. Opt. 57(1) 102-111 (2018)

Design of an ultra-broadband near-perfect bilayer grating metamaterial absorber based on genetic algorithm

Haoyuan Cai, Yi Sun, Xiaoping Wang, and Shuyue Zhan
Opt. Express 28(10) 15347-15359 (2020)

Epsilon-near-zero thin-film metamaterials for wideband near-perfect light absorption

Evan M. Smith, Jinnan Chen, Joshua R. Hendrickson, Justin W. Cleary, Chandriker Dass, Amber N. Reed, Shivashankar Vangala, and Junpeng Guo
Opt. Mater. Express 10(10) 2439-2446 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription