Dynamically Tunable Electromagnetically Induced Transparency in Graphene-Based Coupled Micro-ring Resonators

Zhou, Xuetong; Zhang, Tian; Yin, Xiangkun; Chen, Lin; Li, Xun

doi:10.1109/jphot.2017.2690684

Cited by 30 publications

(17 citation statements)

References 53 publications

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“… where η 0 (=377 Ω) is the impedance of air, k 0 is the wave vector in the air, and d g is the total thickness of n -layer graphene sheets. The out-of-plane permittivity of graphene, ε y , is kept constant at 2.5, regardless of the Fermi level [ 27 , 28 ].…”

Section: Methodsmentioning

confidence: 99%

High-Efficiency Plasmonic Third-Harmonic Generation with Graphene on a Silicon Diffractive Grating in Mid-infrared Region

Tian

Chen

2018

Nanoscale Res Lett

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Benefiting from the large third-order nonlinear susceptibility of graphene and significantly enhanced field intensity of graphene plasmons (GPs), graphene has shown great potentials to enhance plasmonic third-harmonic generation conversion efficiency. However, it still lacks an effective configuration that can excite the fundamental frequency (FF) GPs and guide the generated third-harmonic frequency (THF) GPs simultaneously. Here, we have proposed a diffractive silicon grating underneath a graphene sheet to generate and transmit THF GPs. The FF GPs are efficiently excited by illuminating a normal-incidence plane wave due to guided-mode resonance and then are converted to the THF GPs with a large conversion efficiency, originating from the giant field intensity of the FF GPs. We numerically demonstrate that, a large third-harmonic generation conversion efficiency of 3.68 × 10−7 can be realized with a small incident power density of 0.19 MW/cm2 at 28.62 μm. Furthermore, the generated THF GPs can be efficiently guided along low-loss GP waveguides that are connected to both sides of grating section. Our results can stimulate making graphene-based light sources for mid- and far-infrared silicon photonics.

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Section: Methodsmentioning

confidence: 99%

High-Efficiency Plasmonic Third-Harmonic Generation with Graphene on a Silicon Diffractive Grating in Mid-infrared Region

Tian

Chen

2018

Nanoscale Res Lett

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“…Nowadays, scientists have reported many novel properties for graphene in the THz region, where one of them is certainly the conductivity of the graphene. Based on this tunable parameter, many innovative devices have been designed and fabricated in plasmonics such as sensors [5,6], couplers [7][8][9], filters [10][11][12], resonators [13][14][15], Radar Cross-Section (RCS) reduction-based devices [16][17][18] and circulators [19][20][21][22]. Among these devices, graphene-based waveguides play a remarkable role in graphene plasmonics, which are divided into various platforms such as planar [23][24][25][26][27][28][29][30][31][32][33][34][35], cylindrical [36][37][38][39][40], and elliptical structures [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Highly Confined Mid-infrared Plasmonics in Graphene-plasma Cylindrical Structures

Heydari

2022

Preprint

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A new theoretical model is suggested for gyro-electric cylindrical waveguides incorporating graphene layers in this article. To validate the model, the analytical result of FOM is compared to simulation one prepared by COMSOL for a graphene nano-wire. The full agreement between them is seen, which confirmed the high accuracy of our model. As a special case of the general waveguide, a novel gyro-electric-based waveguide with double-layer graphene, constituting graphene-InSb-graphene-SiO2-Si layers, is introduced and investigated. It is shown that the FOM of the designed waveguide could be altered via the chemical potential and the magnetic field.

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“…In recent years, actively controllable EIT metamaterials have been considerably attractive due to the expected realization of dynamic modulation of the transmittance and dispersive characteristics, which is critical for optical practical applications 18 – 20 . Via several electron injection tuning approaches, such as liquid crystal control, use of the phase transition effect, and use of graphene resonators, regulation of the EIT analog can be achieved due to the tunable modification of optical constants of the medium 21 – 23 . However, some difficulties exist in the realistic fabrication of these schemes due to the challenges in integrating the tuning triggers for the system.…”

Section: Introductionmentioning

confidence: 99%

Actively tunable THz filter based on an electromagnetically induced transparency analog hybridized with a MEMS metamaterial

Huang

Nakamura

Takida

et al. 2020

Sci Rep

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Electromagnetically induced transparency (EIT) analogs in classical oscillator systems have been investigated due to their potential in optical applications such as nonlinear devices and the slow-light field. Metamaterials are good candidates that utilize EIT-like effects to regulate optical light. Here, an actively reconfigurable EIT metamaterial for controlling THz waves, which consists of a movable bar and a fixed wire pair, is numerically and experimentally proposed. By changing the distance between the bar and wire pair through microelectromechanical system (MEMS) technology, the metamaterial can controllably regulate the EIT behavior to manipulate the waves around 1.832 THz, serving as a dynamic filter. A high transmittance modulation rate of 38.8% is obtained by applying a drive voltage to the MEMS actuator. The dispersion properties and polarization of the metamaterial are also investigated. Since this filter is readily miniaturized and integrated by taking advantage of MEMS, it is expected to significantly promote the development of THz-related practical applications such as THz biological detection and THz communications.

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Dynamically Tunable Electromagnetically Induced Transparency in Graphene-Based Coupled Micro-ring Resonators

Cited by 30 publications

References 53 publications

High-Efficiency Plasmonic Third-Harmonic Generation with Graphene on a Silicon Diffractive Grating in Mid-infrared Region

High-Efficiency Plasmonic Third-Harmonic Generation with Graphene on a Silicon Diffractive Grating in Mid-infrared Region

Highly Confined Mid-infrared Plasmonics in Graphene-plasma Cylindrical Structures

Actively tunable THz filter based on an electromagnetically induced transparency analog hybridized with a MEMS metamaterial

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