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

Ultra-broadband wide-angle perfect absorber in the visible regime through a thin grating–insulator–metal structure

Not Accessible

Your library or personal account may give you access

Abstract

A new thin grating-insulator-metal (GIM) structure with ultra-broadband wide-angle perfect absorption is proposed, and a general approach to this kind of multilayered structure is investigated based on the rigorous coupled-wave analysis method and the transfer matrix method. On the basis of this approach, the electromagnetic field distributions in each layer and optical diffraction coefficients are derived theoretically. Compared with a metal–insulator–metal (MIM) structure, the GIM structure consisting of a metal grating on top of a low-loss dielectric layer and a bottom metal layer can achieve a higher absorption with the smaller thickness that attributes to the extraordinary optical transmission of the top grating layer and the cavity resonance of the middle insulator layer. By optimizing the structural and material parameters, the materials from top to bottom are selected as Mn-Al2O3-Mn, whose thicknesses are 10 nm, 65 nm, and 70 nm, respectively. With these optimum parameters, better performance with average absorption over 95% in the visible regime is obtained. Furthermore, this structure retains near-perfect broadband absorption for large incidence angles and different polarizations. The conclusions presented here could have potential applications in optical devices, such as optical displacement detection and visible light absorption.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
High-absorption grating–insulator–metal structures

Xu Chen, DongJian He, and JiuHui Wu
Appl. Opt. 60(24) 7480-7484 (2021)

Tuning the metal filling fraction in metal-insulator-metal ultra-broadband perfect absorbers to maximize the absorption bandwidth

Amir Ghobadi, Hodjat Hajian, Alireza Rahimi Rashed, Bayram Butun, and Ekmel Ozbay
Photon. Res. 6(3) 168-176 (2018)

Ultra-broadband perfect absorber utilizing refractory materials in metal-insulator composite multilayer stacks

Yuyin Li, Zhengqi Liu, Houjiao Zhang, Peng Tang, Biao Wu, and Guiqiang Liu
Opt. Express 27(8) 11809-11818 (2019)

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 (9)

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

Equations (17)

You do not have subscription access to this journal. Equations 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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved