Tunable light trapping and absorption enhancement with graphene ring arrays

Abstract

Surface plasmon resonance (SPR) has been intensively studied and widely employed for light trapping and absorption enhancement. In the mid-infrared and terahertz (THz) regime, graphene supports the tunable SPR via manipulating its Fermi energy and enhances light-matter interaction at the selective wavelength. In this work, periodic arrays of graphene rings are proposed to introduce tunable light trapping with good angle polarization tolerance and enhance the absorption in the light-absorbing materials nearby to more than one order. Moreover, the design principle here could be set as a template to achieve multi-band plasmonic absorption enhancement by introducing more graphene concentric rings into each unit cell. This work not only opens up new ways of employing graphene SPR, but also leads to practical applications in high-performance simultaneous multi-color photodetection with high efficiency and tunable spectral selectivity.

References in corpus (7)

• The electronic properties of graphene
• Electrochemically Top Gated Graphene: Monitoring Dopants by Raman Scattering
• Graphene plasmonics
• Two-Dimensional Material Nanophotonics
• Electronic and optical properties of graphene nanoribbons in external fields
• Gain Modulation by Graphene Plasmons in Aperiodic Lattice Lasers
• Perfect light trapping in nanoscale thickness semiconductor films with resonant back reflector and spectrum-splitting structures

Cited by in corpus (15)

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• Strong interaction between graphene layer and Fano resonance in terahertz metamaterials
• Tunable ultra-high-efficiency light absorption of monolayer graphene using critical coupling with guided resonance
• A tunable plasmonic refractive index sensor with nanoring-strip graphene arrays
• Independently tunable dual-spectral electromagnetically induced transparency in a terahertz metal-graphene metamaterial
• Plasmonic absorption characteristics based on dumbbell-shaped graphene metamaterial arrays
• Active Manipulation of Electromagnetically Induced Transparency in a Terahertz Hybrid Metamaterial
• Approaching perfect absorption of monolayer molybdenum disulfide at visible wavelengths using critical coupling
• Engineering light absorption at critical coupling via bound states in the continuum
• A spectrally tunable plasmonic photosensor with an ultrathin semiconductor region
• Active control of electromagnetically induced transparency analogue in all-dielectric metamaterials loaded with graphene
• Strong interaction between graphene and localized hot spots in all-dielectric metasurfaces
• Tunable light trapping and absorption enhancement with graphene-based complementary metamaterials
• Greatly enhanced light emission of MoS${}_2$ using photonic crystal heterojunction