Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays
A broadband optical absorber based on the nanostructured germanium (Ge) film composed of single-sized circular nanodisk–nanohole arrays is proposed, which demonstrates high efficiency, strong polarization independence, and large viewing angle. Due to the electric and magnetic resonance absorption mo...
Saved in:
Main Authors: | , , , , , |
---|---|
Format: | Article |
Published: |
Optical Society of America
2019
|
Subjects: | |
Online Access: | http://eprints.um.edu.my/22897/ https://doi.org/10.1364/OL.44.000963 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my.um.eprints.22897 |
---|---|
record_format |
eprints |
spelling |
my.um.eprints.228972019-11-01T01:19:24Z http://eprints.um.edu.my/22897/ Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays Zhao, Jiancun Yu, Xiaochang Yang, Xiaoming Tee, Clarence Augustine Teck Huo Yuan, Weizheng Yu, Yiting TK Electrical engineering. Electronics Nuclear engineering A broadband optical absorber based on the nanostructured germanium (Ge) film composed of single-sized circular nanodisk–nanohole arrays is proposed, which demonstrates high efficiency, strong polarization independence, and large viewing angle. Due to the electric and magnetic resonance absorption modes excited by the nanostructure arrays in highly lossy Ge film, the absorber obtains a high absorptivity, reaching above 90% over the full visible wavelength, and it can be maintained well at a large viewing angle over 50°. Based on the geometrical symmetry, the absorber is proved to be polarization independent. Moreover, the simple single-sized nanostructure within a certain size tolerance decreases the design and fabrication complexity. The structural configuration with a slight Ge sidewall formed in the nanofabrication process could enhance the overall light absorption. These results indicate that the proposed broadband absorber has great potential in various applications such as anti-reflective coating and perfect cloaking. Optical Society of America 2019 Article PeerReviewed Zhao, Jiancun and Yu, Xiaochang and Yang, Xiaoming and Tee, Clarence Augustine Teck Huo and Yuan, Weizheng and Yu, Yiting (2019) Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays. Optics Letters, 44 (4). pp. 963-966. ISSN 0146-9592 https://doi.org/10.1364/OL.44.000963 doi:10.1364/OL.44.000963 |
institution |
Universiti Malaya |
building |
UM Library |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Malaya |
content_source |
UM Research Repository |
url_provider |
http://eprints.um.edu.my/ |
topic |
TK Electrical engineering. Electronics Nuclear engineering |
spellingShingle |
TK Electrical engineering. Electronics Nuclear engineering Zhao, Jiancun Yu, Xiaochang Yang, Xiaoming Tee, Clarence Augustine Teck Huo Yuan, Weizheng Yu, Yiting Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
description |
A broadband optical absorber based on the nanostructured germanium (Ge) film composed of single-sized circular nanodisk–nanohole arrays is proposed, which demonstrates high efficiency, strong polarization independence, and large viewing angle. Due to the electric and magnetic resonance absorption modes excited by the nanostructure arrays in highly lossy Ge film, the absorber obtains a high absorptivity, reaching above 90% over the full visible wavelength, and it can be maintained well at a large viewing angle over 50°. Based on the geometrical symmetry, the absorber is proved to be polarization independent. Moreover, the simple single-sized nanostructure within a certain size tolerance decreases the design and fabrication complexity. The structural configuration with a slight Ge sidewall formed in the nanofabrication process could enhance the overall light absorption. These results indicate that the proposed broadband absorber has great potential in various applications such as anti-reflective coating and perfect cloaking. |
format |
Article |
author |
Zhao, Jiancun Yu, Xiaochang Yang, Xiaoming Tee, Clarence Augustine Teck Huo Yuan, Weizheng Yu, Yiting |
author_facet |
Zhao, Jiancun Yu, Xiaochang Yang, Xiaoming Tee, Clarence Augustine Teck Huo Yuan, Weizheng Yu, Yiting |
author_sort |
Zhao, Jiancun |
title |
Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
title_short |
Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
title_full |
Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
title_fullStr |
Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
title_full_unstemmed |
Polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
title_sort |
polarization-independent and high-efficiency broadband optical absorber in visible light based on nanostructured germanium arrays |
publisher |
Optical Society of America |
publishDate |
2019 |
url |
http://eprints.um.edu.my/22897/ https://doi.org/10.1364/OL.44.000963 |
_version_ |
1651867372899794944 |
score |
13.18916 |