Graphene ribbons for tunable coupling with plasmonic subwavelength cavities

Rosolen, Gilles; Maes, Björn

doi:10.1364/josab.31.001096

Cited by 13 publications

(10 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the double-layer graphene ribbons are considered as a whole and called the anti-symmetric dipole-dipole coupling resonator, the proposed device behaves as such construction of the single port coupled with a resonator. The versatile CMT464748 can illustrate very adequately the property of this configuration.…”

Section: Resultsmentioning

confidence: 99%

Tunable graphene-based mid-infrared plasmonic wide-angle narrowband perfect absorber

Wang

Zhai

2016

Sci Rep

View full text Add to dashboard Cite

In this paper, the periodic double-layer graphene ribbon arrays placed near a metallic ground plate coated by a dielectric layer are proposed and analyzed by the coupled-mode theory (CMT) to predict the perfect absorption response in the mid-infrared region. Numerical simulations of the finite-difference time-domain (FDTD) method confirm this effect and give the underlying physical origin. The anti-symmetric dipole-dipole coupling mode is supported by the double-layer graphene ribbons and acts as the electrical resonance to suppress the reflection, because of the impedance matching. The transmission from this system is restricted by the ultra-thick metallic ground plate. All incident electromagnetic energy is efficiently confined in the interlayer between graphene ribbons and the metallic plate, and the dramatic narrowband perfect absorption peak with the FWHM (full width at half maximums) of 300 nm hence is achieved. The spectral position of the absorption peak can be dynamically tuned by a small change in the chemical potential of graphene, in addition to varying geometrical parameters of the absorber. Meanwhile, this device exhibits good absorption stability over a wide angle range of incidence around ± 60° at least. Such absorber will benefit the fabrication of mid-infrared nano-photonic devices for optical filtering and storage.

show abstract

Section: Resultsmentioning

confidence: 99%

Tunable graphene-based mid-infrared plasmonic wide-angle narrowband perfect absorber

Wang

Zhai

2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The latter converts the elements of the absorber into impedance. Here, the propagation property of our proposed structure is investigated by CMT [38], [47].…”

Section: Modelsmentioning

confidence: 99%

Dynamically Tunable Dual-Frequency Terahertz Absorber Based on Graphene Rings

Chen

Geng

2019

IEEE Photonics J.

View full text Add to dashboard Cite

A dual-frequency absorber with periodic double-layer graphene ring arrays separated by dielectric spacer is proposed. Coupled-mode theory and finite difference time domain method are used to analyze the perfect absorption and the absorption mechanism. Moreover, the influences of structural parameters and chemical potential of graphene on the peak positions have been investigated. Benefiting from chemical potential can be controlled by external bias voltage, thus the proposed structure can be used as a dynamically tunable absorber. Such simple absorber has potential applications in optical storage devices and frequency-selective detectors for terahertz regime.

show abstract

“…To overcome the fabrication difficulties, a graphene sheet gated with a ridged ground plane is also proposed to support the EGPs modes. 14 The EGPs modes, which can possess deep-wavelength confinement, can be applied in ultra compact waveguide devices, such as bends, 15 resonators, 16,17 Bragg reflectors 18 and so on. Optical circuit model 19 and plasmon wave function 20 are also established to illustrate the underlying physical meaning.…”

Section: Introductionmentioning

confidence: 99%

Transmittance characteristics and tunable sensor performances of plasmonic graphene ribbons

et al. 2016

View full text Add to dashboard Cite

We investigate the transmittance characteristics of graphene ribbons numerically. It is found that the transmission dips originate from the transverse and longitudinal resonances of edge graphene plasmon modes, supported by the graphene ribbon resonator. The environmental refractive index changes are detected by measuring the resulting spectral shifts of the resonant transmission dip, so the graphene ribbons can be applied to plasmonic sensor in infrared. Simulation results show that sensing performances for each resonant mode are similar, and figure of merit can be up to 6. Beside, thanks to the tunable permittivity of graphene by bias voltages, the transmittance spectra and sensor performances can be easily tuned.

show abstract

Graphene ribbons for tunable coupling with plasmonic subwavelength cavities

Cited by 13 publications

References 26 publications

Tunable graphene-based mid-infrared plasmonic wide-angle narrowband perfect absorber

Tunable graphene-based mid-infrared plasmonic wide-angle narrowband perfect absorber

Dynamically Tunable Dual-Frequency Terahertz Absorber Based on Graphene Rings

Transmittance characteristics and tunable sensor performances of plasmonic graphene ribbons

Contact Info

Product

Resources

About