Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Broadband LWIR and MWIR metamaterial absorbers with a simple design topology: almost perfect absorption and super-octave band operation in MWIR band

Not Accessible

Your library or personal account may give you access

Abstract

Infrared absorbers are essential structures in the design of thermal emitters and thermal infrared imagers. In this study, we propose simple topologies of wideband metamaterial absorbers operating in the long-wave infrared or in the mid-wave infrared (MWIR) wavelengths of the electromagnetic spectrum where the atmosphere shows transparent behavior. Suggested metamaterial absorbers are mostly thin structures that consist of three functional layers from top to bottom: a periodically patterned metal layer, a planar dielectric layer, and a ground metal layer. The pattern of the top metal layer is four-fold symmetric to guarantee the polarization insensitivity of the absorber under normal incidence of light. In addition, a geometrically simple metamaterial pattern is preferred to facilitate the process of lithography. As titanium is known to be a high-loss metal, it is deliberately used at the top layer of the absorber to increase the overall absorption bandwidth. Highly satisfactory absorber results, such as almost perfect absorption and super-octave band operation are demonstrated, especially in the MWIR region. As oxidation of the top titanium layer may cause performance degradation in long-term use, a design modification is also suggested where a very thin protective coating layer is applied over the titanium metasurface.

© 2017 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultra-broadband long-wavelength infrared metamaterial absorber based on a double-layer metasurface structure

Kadir Üstün and Gönül Turhan-Sayan
J. Opt. Soc. Am. B 34(2) 456-462 (2017)

Mid-wave and long-wave infrared dual-band stacked metamaterial absorber for broadband with high refractive index sensitivity

Enzhu Hou, Dejia Meng, Zhongzhu Liang, Ying Xiong, Fuming Yang, Yinhui Tang, Yandong Fan, Zheng Qin, Xiaoyan Shi, Yuhao Zhang, Jingqiu Liang, Changhong Chen, and Jianjun Lai
Appl. Opt. 59(9) 2695-2700 (2020)

Dual-band metamaterial absorber with a low-coherence composite cross structure in mid-wave and long-wave infrared bands

Enzhu Hou, Zheng Qin, Zhongzhu Liang, Dejia Meng, Xiaoyan Shi, Fuming Yang, Wenjun Liu, Hua Liu, Haiyang Xu, David R. Smith, and Yichun Liu
Opt. Express 29(22) 36145-36154 (2021)

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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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

Tables (1)

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

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

Metrics

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved