Near-Perfect THz Absorber with Wide Range Tunability

Omnia Samy, Taiichi Otsuji, Amine El Moutaouakil

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

THz absorbers have wide applications ranging from sensors and monochromatic detectors for narrowband absorbers to shielding and energy harvesting for broadband absorbers. Designing a THz absorber with perfect absorption is a challenging topic. In this work, we present a broadband THz absorber with bandwidth ranging from 0.9 to 1.3 THz and a near-perfect absorption >90%. The absorptance frequency can be tuned using low voltage application (0.2-5 V), from 1.3 to 10 THz while maintaining high absorptivity. In comparison with other structures, this absorber is ultra-thin (20 nm - 160 nm) with a simple structure based on 2D materials (graphene, MoS2, phosphorene) without including Au or other precious materials. It is easy to fabricate, cost-effective, and voltage-tunable through nearly the whole THz region. Although the structure is a broadband absorber its fractional bandwidth ranges from 20-45% which can be enhanced to a narrowband absorber in future works.

Original languageEnglish
Title of host publicationIRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves
PublisherIEEE Computer Society
ISBN (Electronic)9798350336603
DOIs
Publication statusPublished - 2023
Event48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada
Duration: Sept 17 2023Sept 22 2023

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Country/TerritoryCanada
CityMontreal
Period9/17/239/22/23

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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