ArticleNanomaterials (Basel, Switzerland)2023
Angular-Dependent THz Modulator with Hybrid Metal-Graphene Metastructures.
Article in Nanomaterials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Editorial of the Special Issue 'Nano-Optics and Nano-Optoelectronics: Challenges and Future Trends'.Nanomaterials (Basel, Switzerland) · 2024Article
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Authors and funding
5 authors.
Funding
Abstract
The coupling effects of surface plasmon resonance (SPR) from metamaterials induce variation in both the frequency and intensity of plasmonic modes. Here, we report an angular-dependent THz modulator with hybrid metal-graphene metastructures. The metastructures composed of the period gold split-rod arrays on top of a monolayer graphene, which show redshift modulation in the THz region with an increasing incident angle due to the strong out-of-plane magnetic flux introduced by the clockwise circular current at the oblique incidence. By utilizing graphene-based actively tunable conductor with ion-gel electrical gating, the THz transmission can be significantly modified. The modulation depth of the hybrid metal-graphene metastructure modulator can reach ~37.6% at 0.62 THz with a gate voltage of -3 V. The theoretical modeling of transmitted dependency on frequency and incident angle is demonstrated at different Fermi energies, which fits well with the experimental results. This hybrid device can offer a useful method for THz applications (such as angle sensors or angular-resolved spectroscopy), where angle-dependent modulation is needed.
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