Broadband infrared metamaterial absorber with raindrop-shaped submicron-scale disk array

Wei Jia; Jing Bai; Kevin Roberts; David Gosztola; Gary Wiederrecht; Debao Zhou

doi:10.1117/12.2541980

2 March 2020 Broadband infrared metamaterial absorber with raindrop-shaped submicron-scale disk array

Wei Jia, Jing Bai, Kevin Roberts, David Gosztola, Gary Wiederrecht, Debao Zhou

Proceedings Volume 11274, Physics and Simulation of Optoelectronic Devices XXVIII; 1127403 (2020) https://doi.org/10.1117/12.2541980
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

In this paper, we present results from our theoretical and experimental exploration of tailoring the absorption spectrum of a type of metamaterial absorber through manipulating the symmetricity and uniformity of the metallic submicron particle array on the top layer. The absorber under study is a metal-insulator-metal (MIM) trilayer structure made up of a top layer of engineered metallic submicron particles, a middle insulator spacer layer and an opaque ground metal reflector layer. We first studied the structure with a top layer consisting of a uniform array of raindrop-shaped gold (Au) submicron disks. We designed the raindrop shape with a reflectional symmetry on the 45° line. We compared the spectrum generated with that of a similar structure but the top layer which is filled with uniformly arranged circular submicron discs. It has been well reported that an array of circular particles each with both reflectional and rotational symmetries usually generates a spectrum with one absorption spike. By changing the circular shape to raindrop shape, the MIM absorber has been predicted to generate two absorption peaks with significantly broadened absorption bandwidth. Subsequently, we found that even wider spectra could be achieved if the top layer is built with a periodic arrangement of the unit cells containing differently sized raindrop-shaped disks. This leads to a wider bandwidth of higher than 50% absorbance ranging from 2.80 μm to 3.90 μm.

Citation Download Citation

Wei Jia, Jing Bai, Kevin Roberts, David Gosztola, Gary Wiederrecht, and Debao Zhou "Broadband infrared metamaterial absorber with raindrop-shaped submicron-scale disk array", Proc. SPIE 11274, Physics and Simulation of Optoelectronic Devices XXVIII, 1127403 (2 March 2020); https://doi.org/10.1117/12.2541980

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available