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Title: A three-dimensional all-metal terahertz metamaterial perfect absorber

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4996897· OSTI ID:1473862

We present a three-dimensional terahertz metamaterial perfect absorber (MPA) that exhibits a high quality factor and is polarization insensitive. The unit cell is composed of two orthogonally oriented copper stand-up split ring resonators deposited on a copper ground plane with capacitive gaps in free space away from the substrate. Near unity (99.6%) absorption at ~1.65 THz is experimentally obtained in excellent agreement with simulation results. The quality factor is ~37, which is quite large for a terahertz MPA because of reduced material losses in the all-metal structure. According to simulation results, the MPA is insensitive to the polarization of the incident wave, and more than 90% absorption can be achieved for angles of incidence up to 60° for both TE and TM polarized incident THz waves.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-09ER46643; SC0002384
OSTI ID:
1473862
Alternate ID(s):
OSTI ID: 1373442
Journal Information:
Applied Physics Letters, Vol. 111, Issue 5; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Terahertz metamaterial perfect absorber with continuously tunable air spacer layer journal August 2018
Antireflection-assisted all-dielectric terahertz metamaterial polarization converter journal September 2018
Ultrasensitive sensing with three-dimensional terahertz metamaterial absorber journal April 2018
Graphene-embedded broadband tunable metamaterial absorber in terahertz band journal December 2019
Electrically tunable graphene-based metamaterials: A brief review journal November 2019
UHF Metamaterial Absorber with Small-Size Unit Cell by Combining Fractal and Coupling Lines journal September 2018
Implementing infrared metamaterial perfect absorbers using dispersive dielectric spacers journal January 2019
Theoretical Investigation of a Simple Design of Triple-Band Terahertz Metamaterial Absorber for High-Q Sensing journal April 2019
Thermally Tunable Ultra-wideband Metamaterial Absorbers based on Three-dimensional Water-substrate construction journal March 2018
Dual-Band Perfect Metamaterial Absorber Based on an Asymmetric H-Shaped Structure for Terahertz Waves journal November 2018