Issue 43, 2018

A broadband omnidirectional absorber incorporating plasmonic metasurfaces

Abstract

An omnidirectional broadband absorber incorporating 170 nm thick metasurfaces was proposed, where silicon dioxide cylinder arrays with a low aspect ratio were covered by 80 nm thick titanium nitride metal. The developed absorber achieves a peak absorption of 0.97 (0.96, experiment), with an average absorption of up to 0.93 (0.91, experiment), in the wavelength range of 250 nm to 800 nm. Its absorptions show an angular tolerance of up to 60° for the simultaneous excitation of the surface plasmon resonance and the cavity resonance. Moreover, with rear illumination, an average absorption of ∼0.8 in the wavelength range of 250 nm to 400 nm is obtained due to the light trapping of titanium nitride metal. Remarkably, a large-scale (1 cm × 3 cm) absorber was fabricated by continuously variable spatial frequency photolithography. This device outperforms previously reported absorbers in terms of being lower cost and shows great potential in applications for photothermal and ultraviolet protection.

Graphical abstract: A broadband omnidirectional absorber incorporating plasmonic metasurfaces

Article information

Article type
Paper
Submitted
01 Sep 2018
Accepted
11 Oct 2018
First published
12 Oct 2018

J. Mater. Chem. C, 2018,6, 11593-11597

A broadband omnidirectional absorber incorporating plasmonic metasurfaces

S. Wu, Y. Ye and L. Chen, J. Mater. Chem. C, 2018, 6, 11593 DOI: 10.1039/C8TC04385J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements