Tunable plasmonically induced reflection in graphene-coupled side resonators and its application

Asgari, Somayyeh; Granpayeh, Nosrat

doi:10.1117/1.jnp.11.026012

Cited by 23 publications

(10 citation statements)

References 43 publications

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“…7(b)). The proposed planar filter will find many further applications in the design of some novel nano-scale devices such as plasmonic multi/demultiplexers, [53] channel add-drop filters, [16] switches with nonlinear Kerr selfphase modulation (SPM) and cross-phase modulation (XPM) effects, [54][55][56] sensors, [57,58] logic gates, [59] analog-to-digital converters, [60] decoders, [61] n-coders, [62] flip-flops, [63] delay lines, [64] plasmonically-induced transparency (PIT), and perfect absorptions [65][66][67] in photonic integrated circuits. The noticeable advantage of these graphene-based devices is that the performance wavelength of them can be tuned easily by applying bias voltage to the graphene waveguides and ring resonators.…”

Section: Power Splittermentioning

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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Section: Power Splittermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…Other works have treated theoretically [25] and experimentally [26] EIR resonances in planar metamaterials for plasmonic sensing applications. Also, other structures based on graphene plasmonic devices [27], coupled-resonators in photonic-crystal waveguides [28] and metal--insulator-metal plasmonic waveguide-resonator coupling systems [29], have shown EIR resonances. In addition, EIR resonances have been proposed to realize a narrow-band perfect absorber with two absorption peaks for plasmonic sensor [30].…”

Section: Introductionmentioning

confidence: 99%

Aharonov-Bohm-effect induced transparency and reflection in mesoscopic rings side coupled to a quantum wire

Mrabti

Labdouti

Mouadili

et al. 2020

Physica E: Low-dimensional Systems and Nanostructures

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We demonstrate analytically and numerically the possibility of existence of the analogues of electromagnetic induced transparency (EIT) and electromagnetic induced reflection (EIR) in a simple mesoscopic structure. The latter consists of a ring of length 2d attached vertically to two semi-infinite leads (waveguide) by a wire of length d 1 . The ring is threaded by a magnetic flux Φ, the so-called Aharonov-Bohm effect. The number of dangling wire-ring resonators attached at the same point can be increased to N. First, we demonstrate analytically that in the absence of the magnetic flux (Φ ¼ 0) and for particular values of d 1 , the structure may present some states that are confined in the ring and do not interact with the waveguide states. These trapped states fall in the continuum states of the two leads and therefore represent bound in continuum (BIC) states. These states are characterized by a zero width resonance (i.e., infinite life-time) in the transmission and reflection spectra. In presence of a weak magnetic flux (Φ 6 ¼ 0), the BIC states transform to EIT or EIR resonances for specific values of the lengths d 1 and d of the wire and the ring respectively. In addition to the numerical results, we have developed Taylor expansion calculations of the transmission and reflection coefficients around EIT and EIR resonances to show that the latter can be written following a Fano shape. In particular, we have deduced the Fano parameter q and the quality factor Q of these resonances as function of N and the flux Φ. We have found that Q decreases as function of Φ for both EIT and EIR resonances, whereas it increases (decreases) as function of N for EIT (EIR) resonances. These results show the possibility of tuning EIT and EIR resonances by means of the magnetic flux Φ and the number of dangling resonators N. The effect of temperature on EIT and EIR resonances is also considered through an analysis of the Landauer-Buttiker conductance formula obtained from transmission. The theoretical results are obtained within the framework of the Green's function method which enables us to deduce analytically the dispersion relation, transmission and reflection coefficients. These results may have important applications for electronic transport in mesoscopic systems such as filters and demultiplexers.

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“…One of the key advantages of graphene over noble metals is the possibility to dynamically tune its conductivity by changing its Fermi-level energy; this is performed in practice by applying a voltage gate on graphene layer [14]. A merge between graphene physics and plasmonics has been introduced lately, to design graphene-based meta-surfaces [15,16], optical waveguides [17,18], switches [19,20], photo-detectors [21, 22], filters [23,24], refractive index sensors [25,26] and directionalcoupler [27]. Moreover, PIT-effect has been shown numerically and theoretically in a graphene-based Fabry-Perot microcavity [28].…”

Section: Introductionmentioning

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 plasmonically induced reflection in graphene-coupled side resonators and its application

Cited by 23 publications

References 43 publications

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

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

Aharonov-Bohm-effect induced transparency and reflection in mesoscopic rings side coupled to a quantum wire

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

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