Dynamically Electrically Tunable Broadband Absorber Based on Graphene Analog of Electromagnetically Induced Transparency

Yao, Gang; Ling, Furi; Yue, Jin; Luo, Chunya; Luo, Qin; Yao, Jianquan

doi:10.1109/jphot.2015.2513210

Cited by 51 publications

(26 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, it has high carrier mobility, which makes it a desirable candidate for plasmonic material with relatively low loss 50 . Due to these unique properties, graphene has been used to design different types of tunable metasurfaces from THz to near-IR [143][144][145] . Majority of these metasurfaces employ either metal or dielectric resonators with a layer of graphene to realize the tuning function 50,87,88,[146][147][148][149][150][151][152][153][154][155][156] , while some metasurfaces use the patterned graphene as plasmonic resonator directly 49,89,90,[157][158][159][160][161] .…”

Section: Graphenementioning

confidence: 99%

Tunable and reconfigurable metasurfaces and metadevices

Nemati

Wang

Hong

et al. 2018

Opto-Electronic Advances

318

205

View full text Add to dashboard Cite

Metasurfaces, two-dimensional equivalents of metamaterials, are engineered surfaces consisting of deep subwavelength features that have full control of the electromagnetic waves. Metasurfaces are not only being applied to the current devices throughout the electromagnetic spectrum from microwave to optics but also inspiring many new thrilling applications such as programmable on-demand optics and photonics in future. In order to overcome the limits imposed by passive metasurfaces, extensive researches have been put on utilizing different materials and mechanisms to design active metasurfaces. In this paper, we review the recent progress in tunable and reconfigurable metasurfaces and metadevices through the different active materials deployed together with the different control mechanisms including electrical, thermal, optical, mechanical, and magnetic, and provide the perspective for their future development for applications.

show abstract

Section: Graphenementioning

confidence: 99%

Tunable and reconfigurable metasurfaces and metadevices

Nemati

Wang

Hong

et al. 2018

Opto-Electronic Advances

318

205

View full text Add to dashboard Cite

show abstract

“…One of the most important features of graphene is that its Femi energy can be freely modulated within a broad range by applying an electrostatic biasing [37]. In our study, we choose an arbitrary initial value of =0.5e f E V and then sweep its value to study the tunable functionality of the proposed graphene MPA.…”

Section: Geometry and Principle Of The Proposed Graphene Absorbermentioning

confidence: 99%

Hybridization-induced broadband terahertz wave absorption with graphene metasurfaces

et al. 2018

View full text Add to dashboard Cite

Electromagnetic (EM) wave absorption plays a vital role in photonics. While metasurfaces are proposed to absorb EM waves efficiently, most of them exhibit limited bandwidth and fixed functionalities. Here, we propose a broadband and tunable terahertz (THz) absorber based on a graphene-based metasurface, which is constructed by a single layer of closely patterned graphene concentric double rings and a metallic mirror separated by an ultrathin SiO layer. Plasmonic hybridization between two graphene rings significantly enlarges the absorption bandwidth, which can be further tuned by gating the graphene. Moreover, the specific design also makes our device insensitive to the incident angle and polarization state of impinging EM waves. Our results may inspire certain wave-modulation-related applications, such as THz imaging, smart absorber, tunable sensor, etc.

show abstract

“…A graphene layer is patterned on a grounded dielectric substrate. The substrate is chosen silicon dioxide, SiO2, which is applied for graphene structures [16]. A 0.5 µm thick gold layer is employed as ground plane.…”

Section: Metamaterials Structure Designmentioning

confidence: 99%

“…Ultra-wideband metamaterial graphene ribbons on a thick dielectric with 118 µm thickness, and a tunable graphene based metamaterial absorber on a relatively thick dielectric with 17 µm thickness, are proposed in literature [14,15], respectively. A broadband tunable terahertz metamaterial absorber based on graphene, is designed in literature [16]. In this structure, with varying graphene's chemical potential broadband performance changes to a narrowband absorber, albeit there isn't a direct relation between absorption frequency and graphene's chemical potential.…”

Section: Introductionmentioning

confidence: 99%

Dual-band, Dynamically Tunable Plasmonic Metamaterial Absorbers Based on Graphene for Terahertz Frequencies

Jarchi

Rashed-Mohassel

Mehranpour

2019

IJE

View full text Add to dashboard Cite

In this paper, a compact plasmonic metamaterial absorber for terahertz frequencies is proposed and simulated. T he absorber is based on metamaterial graphene structures, and benefits from dynamically controllable properties of graphene. T hrough patterning graphene layers, plasmonic resonances are tailored to provide a dual band as well as an improved bandwidth absorption. Unit cell of the designed structure is made of four complementary square rings, on a thin grounded SiO2 layer of 5 µm thickness. Four splits are included in the square rings to provide continuity of graphene layer. Dual band absorption of 90% is provided, which frequency of peak absorption increases with increasing chemical potential of graphene layer. It is shown that with varying dimensions of the split rings an improved bandwidth absorber is also achieved, where absorption band increases with increasing graphene's chemical potential either. To better understand excitation of plasmonic resonances on the proposed structure, electric field distribution on the graphene layer as well as at the unit cell's cross section is investigated and graphically demonstrated. Dependence of absorption on incidence and polarization angles of the incoming wave is studied and also graphically presented.

show abstract

Dynamically Electrically Tunable Broadband Absorber Based on Graphene Analog of Electromagnetically Induced Transparency

Cited by 51 publications

References 27 publications

Tunable and reconfigurable metasurfaces and metadevices

Tunable and reconfigurable metasurfaces and metadevices

Hybridization-induced broadband terahertz wave absorption with graphene metasurfaces

Dual-band, Dynamically Tunable Plasmonic Metamaterial Absorbers Based on Graphene for Terahertz Frequencies

Contact Info

Product

Resources

About