Tunable, Mid-Infrared Ultra-Narrowband Filtering Effect Induced by Two Coplanar Graphene Strips

Li, Hong-Ju; Wang, Lingling; Liu, Jianqiang; Huang, Zhenhua; Sun, Bin; Zhai, Xiang

doi:10.1007/s11468-014-9736-x

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…Moreover, the continuously tunable conductivity of graphene via manipulating its Fermi energy enables active SPRs [16][17][18], which provide an effective route for efficient real-time control and manipulation of the incidence light and offer much more flexibility than traditional plasmonic materials. Therefore, a range of graphene-based active applications have been proposed and demonstrated in the mid-infrared and THz regime such as absorbers [19][20][21], biosensors [22,23], filters [24][25][26] and modulators [27,28], which are considered as potential competitors to their electrically controllable metallic counterparts [29,30]. Though the function role of graphene in the active control of SPRs has been extensively investigated, the interaction between graphene and metal-based resonant micro/nanostructures has not been fully understood, which is also technically important since it may provide new opportunities to reveal novel physical mechanisms as well as feed back precursors for the calibration of active control and application development of metal-graphene hybrid micro/nanostructures [31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Strong interaction between graphene layer and Fano resonance in terahertz metamaterials

Xiao¹,

Wang²,

Jiang³

et al. 2017

J. Phys. D: Appl. Phys.

124

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Abstract. Graphene has emerged as a promising building block in the modern optics and optoelectronics due to its novel optical and electrical properties. In the midinfrared and terahertz (THz) regime, graphene behaves like metals and supports surface plasmon resonances (SPRs). Moreover, the continuously tunable conductivity of graphene enables active SPRs and gives rise to a range of active applications. However, the interaction between graphene and metal-based resonant metamaterials has not been fully understood. In this work, a simulation investigation on the interaction between the graphene layer and THz resonances supported by the two-gap split ring metamaterials is systematically conducted. The simulation results show that the graphene layer can substantially reduce the Fano resonance and even switch it off, while leave the dipole resonance nearly unaffected, which phenomenon is well explained with the high conductivity of graphene. With the manipulation of graphene conductivity via altering its Fermi energy or layer number, the amplitude of the Fano resonance can be modulated. The tunable Fano resonance here together with the underlying physical mechanism can be strategically important in designing active metal-graphene hybrid metamaterials. In addition, the "sensitivity" to the graphene layer of the Fano resonance is also highly appreciated in the field of ultrasensitive sensing, where the novel physical mechanism can be employed in sensing other graphene-like twodimensional (2D) materials or biomolecules with the high conductivity.

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Section: Introductionmentioning

confidence: 99%

Strong interaction between graphene layer and Fano resonance in terahertz metamaterials

Xiao¹,

Wang²,

Jiang³

et al. 2017

J. Phys. D: Appl. Phys.

124

View full text Add to dashboard Cite

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“…Graphene, a monolayer of carbon atoms arranged in plane with a honeycomb lattice, behaves like metals when interacting with the incidence light and supports SPR for active material applications in the mid-infrared (mid-IR) and terahertz (THz) regime [13,14,15,16]. Furthermore, the continuously tunable surface conductivity of graphene with manipulating its Fermi energy enables actively tunable resonance [17,18,19,20,21,22], which can be utilized to enhance the light absorption at the selected wavelength and thus amplify the photoresponse to the incidence light with tunable spectral selectivity [23].…”

Section: Introductionmentioning

confidence: 99%

A Spectrally Tunable Plasmonic Photosensor with an Ultrathin Semiconductor Region

et al. 2017

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Surface plasmon resonance (SPR) has been widely utilized to improve the absorption performance in the photosensors. Graphene has emerged as a promising plasmonic material, which supports tunable SPR and shows significant flexibility over metals. In this letter, a hybrid photosensor based on the integration of periodic cross-shaped graphene arrays with an ultrathin light-absorbing semiconductor is proposed. A tenfold absorption enhancement over a large range of the incidence angle for both light polarizations as well as a considerably high photogeneration rate (∼ 10 37 ) is demonstrated at the resonance. Compared with traditional metal-based plasmon-enhanced photosensors, the absorption enhancement here can be expediently tuned with manipulating the Fermi energy of graphene. The proposed photosensor can amplify the photoresponse to the incidence light at the selected wavelength and thus be utilized in photosensing with high efficiency and tunable spectral selectivity in the mid-infrared (mid-IR) and terahertz (THz) regime.

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“…The highly tunable plasmonic graphene nanoresonators at mid-infrared have been observed by Brar et al using infrared microscopy [27]. A two coplanar graphene strips coupling system supported on substrates [28], and a graphene-based resonator-coupled waveguide system [29], the tunable multiple layer graphene-based absorber [30, 31] have been researched. However, the modulation of PIT peaks with multi-cavity-coupled graphene sheet system has not been discussed.…”

Section: Introductionmentioning

confidence: 99%

Peak modulation in multicavity-coupled graphene-based waveguide system

Wang

Shao

et al. 2017

Nanoscale Res Lett

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Plasmonically induced transparency (PIT) in a multicavity-coupled graphene-based waveguide system is investigated theoretically and numerically. By using the finite element method (FEM), the multiple mode effect can be achieved, and blue shift is exhibited by tunable altering the chemical potential of the monolayer graphene. We find that the increasing number of the graphene rectangle cavity (GRC) achieves the multiple PIT peaks. In addition, we find that the PIT peaks reduce to just one when the distance between the third cavity and the second one is 100 nm. Easily to be experimentally fabricated, this graphene-based waveguide system has many potential applications for the advancement of 3D ultra-compact, high-performance, and dynamical modulation plasmonic devices.

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Tunable, Mid-Infrared Ultra-Narrowband Filtering Effect Induced by Two Coplanar Graphene Strips

Cited by 13 publications

References 25 publications

Strong interaction between graphene layer and Fano resonance in terahertz metamaterials

Strong interaction between graphene layer and Fano resonance in terahertz metamaterials

A Spectrally Tunable Plasmonic Photosensor with an Ultrathin Semiconductor Region

Peak modulation in multicavity-coupled graphene-based waveguide system

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