AI Article Synopsis
- The paper introduces a new theoretical design for a terahertz metamaterial absorber based on surface plasmon resonance, featuring five distinct absorption peaks.
- This structure consists of a gold bottom layer, a silica medium, and a graphene array, with absorption rates reaching up to 99.87% at specific frequencies.
- The design allows for dynamic tuning of absorption characteristics via graphene's Fermi level, offering high sensitivity and wide-angle performance, making it suitable for applications in sensors and optoelectronic devices.
Article Abstract
This paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on top. COMSOL simulation represents that the five absorption peaks under TE polarization are at = 1.99 THz (95.82%), = 6.00 THz (98.47%), = 7.37 THz (98.72%), = 8.47 THz (99.87%), and = 9.38 THz (97.20%), respectively, which is almost consistent with the absorption performance under TM polarization. In contrast to noble metal absorbers, its absorption rates and resonance frequencies can be dynamically regulated by controlling the Fermi level and relaxation time of graphene. In addition, the device can maintain high absorptivity at 0~50° in TE polarization and 0~40° in TM polarization. The maximum refractive index sensitivity can reach = 1.75 THz/RIU, and the maximum figure of merit (FOM) can reach FOM = 12.774 RIU. In conclusion, our design has the properties of dynamic tunability, polarization independence, wide-incident-angle absorption, and fine refractive index sensitivity. We believe that the device has potential applications in photodetectors, active optoelectronic devices, sensors, and other related fields.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10536418 | PMC |
| http://dx.doi.org/10.3390/mi14091802 | DOI Listing |
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