Dynamic metamaterial based on the graphene split ring high-Q Fano-resonnator for sensing applications

Tang, Weiwei; Wang, Lin; Chen, Xiaoshuang; Liu, Changlong; Yu, Anqi; Lü, Wei

doi:10.1039/c6nr02321e

Cited by 122 publications

(50 citation statements)

References 45 publications

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“…Based on this, several notable works utilizing near-field enhancement in metallic nanostructures have been demonstrated in the mid-IR region. [157][158][159][160] Interestingly, Fano modes could www.advopticalmat.de [150][151][152] Interestingly, graphene provides an excellent 2D platform for a stable adsorption of molecules.…”

Section: Sensing and Spectroscopy Of Moleculesmentioning

confidence: 99%

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2D Materials for Terahertz Modulation

Gopalan

Sensale‐Rodriguez

2019

Advanced Optical Materials

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power consumption and minimizing cross-talk (maintain signal fidelity). As a result, terabit data communication can be made feasible with the help of broadband all-optical devices and circuits. [4] The technology for designing optical components and circuits operating at visible and NIR wavelengths has matured significantly over the last several decades, ensuring their widespread integration. While we can work toward improving data transmission rates of existing communication technology, shortage of spectral bandwidth for data transmission has become a looming problem over time. This has motivated researchers to seek out previously unused portions of the electromagnetic spectrum. The "terahertz gap" (≈30 µm-3 mm) has attracted considerable attention from researchers seeking to bridge the gap between the optical/IR and microwave spectrum. [5,6] Similar to the optical domain, the invention, optimization, and commercialization of discrete components such as sources, modulators, and detectors are necessary for the widespread use and integration of terahertz technologies. Electronic means of terahertz generation utilizing semiconductors (Si, GaAs) IMPATT [7] and Gunn diodes [8] have been developed. In conjunction with a frequency doubler/ tripler circuits, they typically operate on the lower end of the terahertz spectrum (0.1-1 THz); although the power output at higher frequency multiples might be significantly lower as compared to its fundamental mode. Additionally, InGaAs/ InP HBTs and InP HEMTs with cutoff frequencies >600 GHz have been demonstrated. [9,10] The advent of femtosecond lasers has paved the way for the generation of terahertz radiation via photoconductive switches, [11] photo-Dember effect [12,13] and nonlinear optical rectification in organic and inorganic crystals. [14][15][16] Femtosecond lasers have helped develop time domain terahertz systems that have been instrumental in ultrafast spectroscopy to study transient carrier dynamics of semiconductors. Development of terahertz quantum cascade lasers (THz-QCL) employing intersubband transitions in AlGaAs/GaAs quantum wells [17][18][19][20] is a notable milestone in terahertz lasing. In a complementary fashion, terahertz detection could be performed by electro-optic sampling in nonlinear crystals, [21] photoconductive antennas on low-temperature GaAs, [22,23] plasma wave oscillation in a field-effect channel, [24,25] etc. Finally, akin to the compact and economic components available at optical frequencies for the generation, manipulation, and detection, terahertz technology requires Terahertz waves spanning over the 0.1 to 10 THz region of the electromagnetic spectrum have attracted significant attention owing to a variety of potential applications such as short-range high-speed data transmission, noninvasive screening and detection, materials characterization, spectroscopy, etc. This has resulted in massive strides in the development of essential system components such as broadband terahertz sources, detector arrays with high responsivity, as well as...

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Section: Sensing and Spectroscopy Of Moleculesmentioning

confidence: 99%

“…Consequently, several metamaterial-graphene hybrid device concepts have been proposed. [157][158][159][160] Interestingly, Fano modes could www.advopticalmat.de Adv. Optical Mater.…”

Section: Sensing and Spectroscopy Of Moleculesmentioning

confidence: 99%

2D Materials for Terahertz Modulation

Gopalan

Sensale‐Rodriguez

2019

Advanced Optical Materials

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“…Unlike the Lorentz resonance, the Fano resonance has a sharp and asymmetric line shape. Fano resonance, because of its narrow linewidth and high Q factor, can be used in biological and chemical sensors, waveguide modulators, optical switch, and slow light field [3][4][5][6][7][8][9][10], which resulted in gathering people's attention related to research [11][12][13][14][15]. To date, various metamaterial structures, ranging from microwave to optical frequencies, based on Fano resonance have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Dynamically tunable Fano resonance with high Q factor based on asymmetric Dirac semimetal split-ring structure

Yan

Song

Zhang

et al. 2020

Mater. Res. Express

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We propose an asymmetric split-ring (ASR) structure based on Dirac semimetal, which has Fano resonance with a high quality (Q) factor in the terahertz (THz) band, the Q factor can reach a maximum value of 20.19. Amplitude modulation can be achieved by increasing the degree of asymmetry Δθ of the asymmetric split ring. As a result, in this study, an amplitude modulation of 27.19% has been achieved by increasing the asymmetry from 10°to 40°. Furthermore, our full-wave electromagnetic simulations show that the frequency sensitivity values of Fano and quadrupole resonance are as high as 0.6 THz/refractive index unit (RIU) and 0.933 THz/RIU, respectively. In addition, the sensing range can be adjusted by changing the Fermi levels of Dirac semimetal. Our study can guide the practical application of ultrasensitive THz sensors. OPEN ACCESS RECEIVED

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“…[18][19][20][21][22][23] The enhancement of the funda-mental wave and second harmonic wave has been observed in metallic structures and nanostructured metal or graphene. [24][25][26][27][28][29][30][31][32][33][34] Experiments and theories have shown that linear transmission through arrays is sensitive to many factors such as array periodicity, hole shape and size, incidence angle, and film thickness. For instance, the experimental observations of the SHG signal have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Lifetime and nonlinearity of modulated surface plasmon for black phosphorus sensing application

et al. 2018

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Black phosphorus surface plasmon (BPSP) is a new promising candidate material for electromagnetic field confinement at the subwavelength scale. Here, we theoretically investigated the light confinement, second-order nonlinearity and lifetimes of tunable surface plasmons in nanostructured black phosphorus nanoflakes with superstrates. The grating structure can enhance the local optical field of the fundamental wave (FW) and second harmonic wave (SHW) due to the surface plasmon resonance. Based on the coupled mode theory (CMT), a theoretical model for the nanostructured black phosphorus was established to study the spectrum features of FW. The lifetimes of the plasmonic resonant modes were investigated with the finite difference time domain (FDTD) simulations and CMT. Since the permittivity of black phosphorus depends on its Fermi energy and electron scattering rate, the lifetimes of plasmonic absorption modes are tunable with both the Fermi energy and scattering rate. The intensity, wavelengths and spectral width of BPSP resonance modes and their lifetimes can be precisely controlled with the Fermi energy, scattering rate, side length and refractive index of the superstrate. The sensitivity is described by varying the refractive index of the superstrate such as an aqueous solution. We have introduced a secondorder nonlinear source to investigate the SHW of nanostructured black phosphorus. This paper presents the corner/edge energy distribution and the tunable lifetime of BPSP as well as their unprecedented capability of photon manipulation for second-order nonlinearity within the deep subwavelength scale. The configuration and method are useful for research of the absorption, lifetime of light and nonlinear optical processes in black phosphorus-based optoelectronic devices, especially the modulation and sensing applications.

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Dynamic metamaterial based on the graphene split ring high-Q Fano-resonnator for sensing applications

Cited by 122 publications

References 45 publications

2D Materials for Terahertz Modulation

2D Materials for Terahertz Modulation

Dynamically tunable Fano resonance with high Q factor based on asymmetric Dirac semimetal split-ring structure

Lifetime and nonlinearity of modulated surface plasmon for black phosphorus sensing application

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