TY - GEN
T1 - Enhanced Absorptivity in Ultra-thin Graphene Tunable Selective THz Absorber
AU - Samy, Omnia
AU - Otsuji, Taiichi
AU - Moutaouakil, Amine El
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - Selective THz absorbers have a wide range of applications in monochromatic detectors, filters, and sensors, especially with the recent rise in THz technology. Metamaterial absorbers could achieve high absorptivity but have complex structures. Previous selective THz absorbers achieved good absorptivity but in a very limited THz range. In this work, we present a THz selective absorber with at least 95 % and near unity absorption across the whole THz range. When including gold below the substrate with a thickness of 5 nm a rise of 5% in absorptivity is noticed, to increase the least absorptivity from 90% to 95% and near unity at most frequencies. The design is based on simple nanoribbons of graphene, MoS2, and phosphorene monolayers laid over SiO2 and gold. The tunability of the absorption frequency is achieved through varying the gate voltage.
AB - Selective THz absorbers have a wide range of applications in monochromatic detectors, filters, and sensors, especially with the recent rise in THz technology. Metamaterial absorbers could achieve high absorptivity but have complex structures. Previous selective THz absorbers achieved good absorptivity but in a very limited THz range. In this work, we present a THz selective absorber with at least 95 % and near unity absorption across the whole THz range. When including gold below the substrate with a thickness of 5 nm a rise of 5% in absorptivity is noticed, to increase the least absorptivity from 90% to 95% and near unity at most frequencies. The design is based on simple nanoribbons of graphene, MoS2, and phosphorene monolayers laid over SiO2 and gold. The tunability of the absorption frequency is achieved through varying the gate voltage.
KW - graphene/MoS nanoribbons
KW - phosphorene nanoribbons
KW - Selective THz absorbers
UR - http://www.scopus.com/inward/record.url?scp=85207217929&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85207217929&partnerID=8YFLogxK
U2 - 10.1109/IRMMW-THz60956.2024.10697686
DO - 10.1109/IRMMW-THz60956.2024.10697686
M3 - Conference contribution
AN - SCOPUS:85207217929
T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
BT - 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
PB - IEEE Computer Society
T2 - 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
Y2 - 1 September 2024 through 6 September 2024
ER -