Tunable midinfrared wavelength selective structures based on resonator with antisymmetric parallel graphene pair

Asgari, Somayyeh; Dolatabady, Alireza; Granpayeh, Nosrat

doi:10.1117/1.oe.56.6.067102

Cited by 20 publications

(9 citation statements)

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“…Recently, a wide range of research has promoted the development of various types of graphene-based plasmonic devices, such as metasurfaces [14,15], optical waveguides [16,17], switches [18][19][20], modulators [21][22][23], filters [24,25], refractive index sensors [26,27], power splitters [16,28], multi/demultiplexers [29,30], metamaterials [31,32], and couplers [33,34]. Graphene ribbons support two kinds of SPP modes: the waveguide modes with the concentrated field along the entire area of the ribbon and the edge modes with the concentrated field on the verge of the ribbon [35,36].…”

Section: Introductionmentioning

confidence: 99%

Tunable nano-scale graphene-based devices in mid-infrared wavelengths composed of cylindrical resonators

Asgari

Kashani

Granpayeh

2018

J. Opt.

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The performances of three optical devices including a refractive index sensor, a power splitter, and a 4-channel multi/demultiplexer based on graphene cylindrical resonators are proposed, analyzed, and simulated numerically by using the finite-difference time-domain method. The proposed sensor operates on the principle of the shift in resonance wavelength with a change in the refractive index of dielectric materials. The sensor sensitivity has been numerically derived. In addition, the performances of the power splitter and the multi/demultiplexer based on the variation of the resonance wavelengths of cylindrical resonator have been thoroughly investigated. The simulation results are in good agreement with the theoretical ones. Our studies demonstrate that the graphene based ultra-compact, nano-scale devices can be improved to be used as photonic integrated devices, optical switching, and logic gates.

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Section: Introductionmentioning

confidence: 99%

Tunable nano-scale graphene-based devices in mid-infrared wavelengths composed of cylindrical resonators

Asgari

Kashani

Granpayeh

2018

J. Opt.

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“…As the radius of the ring increases, the resonance wavelength and the peak values increase which exhibit a red shift. [17,26] In Fig. 3(b), transmittance spectra of the ring resonator with three different chemical potentials are shown.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…As the chemical potential of the ring increases the resonance wavelength decreases, so the peak values increase, which exhibit a blue shift. [17,26] According to Eq. ( 2), variation of chemical potential, µ c , changes the σ g , so, by substituting Eqs.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…[6,7] Graphene utilized as a novel material for generating new nano-scale optical devices. [8,9] Recently, a wide variety of researches have promoted the development of various types of graphene-based plasmonic devices such as optical waveguides, [10] nano antennas, [11] switches, [12,13] modulators, [14,15] filters, [16,17] metamaterials, [18] metasurfaces, [19] and gratings. [20] Graphene supports two kinds of surface plasmon polariton (SPP) modes: the waveguide modes that the electromagnetic field is confined in along the whole area of the sheet, and the edge modes that the field is confined on the rims of the ribbon.…”

Section: Introductionmentioning

confidence: 99%

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Tunable graphene-based mid-infrared band-pass planar filter and its application

et al. 2018

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We have designed and proposed the edge modes supported by graphene ribbons and the planar band-pass filter consisting of graphene ribbons coupled to a graphene ring resonator by using the finite-difference time-domain numerical method. Simulation results show that the edge modes improve the electromagnetic coupling between devices. This structure works as a novel, tunable mid-infrared band-pass filter. Our studies will benefit the fabrication of planar, ultra-compact nano-scale devices in the mid-infrared region. A power splitter consisting of two output ribbons that is useful in photonic integrated devices and circuits is also designed and simulated. These devices are useful for designing ultra-compact planar devices in photonic integrated circuits.

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“…Based on this figure, we evaluate the sensitivity of the proposed sensor as = 8407 nm∕RIU. Recently, a sensitivity of 7500 nm∕RIU has been achieved in [62], whilst in [63] a value of only = 4800 nm∕RIU was reached. It is worthwhile mentioning that in these works more sophisticated graphene based resonators was studied such as circular graphene nanowires, whereas our geometry design (while being slightly more sensitive) is quite simple in comparison.…”

Section: Nanosensormentioning

confidence: 99%

Terahertz multi-plasmon induced reflection and transmission and sensor devices in a graphene-based coupled nanoribbons resonators

Noual

Amrani

Boudouti

et al. 2019

Optics Communications

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We demonstrate numerically multi-plasmon-induced reflection (PIR), multi-plasmon-induced transparency (PIT) and propose a highly sensitive refractive index nanosensor in a novel ultra-compact graphene-based nano-device, operating in the terahertz frequency range. The base structure of the system is composed out of a bus waveguide made out of graphene coupled to resonators inserted along or aside the waveguide where each resonator is constituted by a set of two coupled graphene nano-ribbons (CGNR). The latters behave as a molecule-like entity, whose surface plasmon eigen-modes originate from the splitting of the single ribbons modes. We show that the two CGNRs can also be regarded as an effective rectangular cavity-like system, so that the insertion of the latter along or aside the graphene bus waveguide (GBW) enables the design of tunable selective or rejective filters, respectively. By inserting two identical effective cavities in the structure, into a Λlike state (in analogy with three level atomic systems), we show the possibility of realizing multiple plasmon induced reflection, and highlight its fast light-features. On the other hand, if the two identical cavities are set symmetrically on each side of the GBW with slightly detuned Fermi energy levels in a V-like configuration, multi-plasmon induced transparency can be obtained. In addition, a highly sensitive refractive index nanosensor is showcased. The latter consists in a GBW, sidecoupled to an effective cavity-oscillator embedded with the analyte to be detected. The sensitivity of the sensor is numerically derived. Owing to its simple structure, the proposed sensor may offer the advantage of being easily fabricated. The showcased graphene-based devices proposed in this work should help the design of tunable and highly integrated optical devices such as nano-filters, optical switches and highly sensitive nanosensors.

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Tunable midinfrared wavelength selective structures based on resonator with antisymmetric parallel graphene pair

Cited by 20 publications

References 0 publications

Tunable nano-scale graphene-based devices in mid-infrared wavelengths composed of cylindrical resonators

Tunable nano-scale graphene-based devices in mid-infrared wavelengths composed of cylindrical resonators

Tunable graphene-based mid-infrared band-pass planar filter and its application

Terahertz multi-plasmon induced reflection and transmission and sensor devices in a graphene-based coupled nanoribbons resonators

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