ArticleNanoscale research letters2019
A Tunable Dual-Band and Polarization-Insensitive Coherent Perfect Absorber Based on Double-Layers Graphene Hybrid Waveguide.
Article in Nanoscale research letters, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- A High Quality-Factor Optical Modulator with Hybrid Graphene-Dielectric Metasurface Based on the Quasi-Bound States in the Continuum.Micromachines · 2022Article
- Dynamically Tunable and Multifunctional Polarization Beam Splitters Based on Graphene Metasurfaces.Nanomaterials (Basel, Switzerland) · 2022Article
- Multi-mode surface plasmon resonance absorber based on dart-type single-layer graphene.RSC advances · 2022Article
- Highly Efficient Light Absorption of Monolayer Graphene by Quasi-Bound State in the Continuum.Nanomaterials (Basel, Switzerland) · 2021Article
- A nanograting-based flexible and stretchable waveguide for tactile sensing.Nanoscale research letters · 2021Article
- Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators.Nanoscale research letters · 2020Article
- Dual-Mode On-to-Off Modulation of Plasmon-Induced Transparency and Coupling Effect in Patterned Graphene-Based Terahertz Metasurface.Nanoscale research letters · 2020Article
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Authors and funding
9 authors.
Funding
Abstract
A suspended monolayer graphene has only about 2.3% absorption rate in visible and infrared band, which limits its optoelectronic applications. To significantly increase graphene's absorption efficiency, a tunable dual-band and polarization-insensitive coherent perfect absorber (CPA) is proposed in the mid-infrared regime, which contains the silicon array coupled in double-layers graphene waveguide. Based on the FDTD methods, dual-band perfect absorption peaks are achieved in 9611 nm and 9924 nm, respectively. Moreover, due to its center symmetric feature, the proposed absorber also demonstrates polarization-insensitive. Meanwhile, the coherent absorption peaks can be all-optically modulated by altering the relative phase between two reverse incident lights. Furthermore, by manipulating the Fermi energies of two graphene layers, two coherent absorption peaks can move over a wide spectrum range, and our designed CPA can also be changed from dual-band CPA to narrowband CPA. Thus, our results can find some potential applications in the field of developing nanophotonic devices with excellent performance working at the mid-infrared regime.
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