High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum

Liu, Tingting; Qin, Meibao; Wu, Feng; Xiao, Shuyuan

doi:10.1103/physrevb.107.075441

Cited by 37 publications

(12 citation statements)

References 48 publications

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“…Fortunately, the revelation of EIT in metamaterial, as first reported by Zhang et al in 2008, has revitalized the prospects of applying the EIT phenomenon [4]. Metamaterials are artificial sub-wavelength structures capable of producing diverse electromagnetic responses that are unattainable in natural materials [5][6][7][8][9][10][11]. Currently, a multitude of EIT metamaterials are being proposed and rigorously investigated for diverse materials [12][13][14][15][16], structures [17][18][19], tunable properties [20][21][22][23][24][25][26], and more.…”

Section: Introductionmentioning

confidence: 99%

Thermally controlled electromagnetically induced transparency metamaterial through the near-field coupling of electric and toroidal resonances

Shu,

Mei

2024

Mater. Res. Express

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We investigate a thermally controlled electromagnetically induced transparency terahertz metamaterial through the near-field coupling of electric and toroidal resonances. The fundamental unit consists of a composite design incorporating both metal and vanadium dioxide components aimed at inducing toroidal resonance, along with a pair of metal strips generating electric resonance. Simulation results authenticate the coupling mechanism and illustrate that the envisioned EIT phenomenon can be dynamically adjusted by temperature. In a coupled oscillator model analysis, the control over coupling strength primarily emerges from the fluctuating damping rate of the bright-mode oscillator. Moreover, the displacement of the EIT peak is linked to alterations in the inherent resonant frequency of the bright-mode oscillator. This study not only broadens the potential applications for toroidal terahertz metamaterials but also enhances the range of EIT methodologies available, providing practical approaches for the utilization of terahertz slow-light devices, sensors, and switch devices.

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Section: Introductionmentioning

confidence: 99%

Thermally controlled electromagnetically induced transparency metamaterial through the near-field coupling of electric and toroidal resonances

Shu,

Mei

2024

Mater. Res. Express

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“…In the terahertz (THz) regime, the engineering of a high-quality ( Q -value) resonance in the metasurfaces is one of the avenues for the giant localized electromagnetic field enhancement, − which is desirable for the development of the trace amount biochemical sensing − and on-chip THz strong-field platform . In the past few years, a wave of research on metasurfaces supporting bound states in the continuum (BICs) has been sparked for their ability to customize high- Q resonances in a flexible manner, − which can be exploited for broad applications associated with ultrasensitive sensing, , nonlinear optical platform, − chirality, and diffraction control . As a natural feature of waves, BICs have been manifested in metasurfaces composed of high-index subwavelength dielectric structures or metallic resonator arrays. − In most metasurfaces that support BIC resonance, the introduced internal perturbations or mode coupling mismatches result in the transition from ideal BIC to quasi-BIC with finite loss rates, which can be broadly categorized as symmetry-protected BIC , and accidental BIC − based on the physical origins.…”

Section: Introductionmentioning

confidence: 99%

Coupling-Based Multiple Bound States in the Continuum and Grating-Assisted Permittivity Retrieval in the Terahertz Metasurface

Cui,

Wang,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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The terahertz (THz) metasurfaces that support bound states in the continuum (BICs) provide a promising platform for various applications due to their high Q-factor resonance. In this study, we experimentally demonstrate multiple BICs with different resonance symmetries in the THz metasurface based on mode coupling. The proposed metasurface is composed of 2 × 2 split ring resonators (SRRs) metamolecules. The SRRs of two different gap angles in the metamolecule lattice provide intrinsic resonance with different frequencies, and the coupling between them exhibits high transmission quasi-BIC resonance, which can be tuned by varying the gap angle. The arrangement of SRRs in the 2 × 2 metamolecule lattice determines the types of coupling that govern the resonance symmetry of quasi-BIC. More interestingly, the multiple quasi-BICs enabled by different couplings can be simultaneously achieved in a metasurface. Apart from tuning the gap angles, the permittivity in the vicinity of SRRs also changes the resonance frequency. Consequently, quasi-BIC can be artificially formed by deliberately constructing the permittivity difference of the dielectric environment on the SRRs. In view of this, we introduce the scheme of permittivity retrieval for the dispersive analyte, assisted by the fixed-permittivity gratings. In addition, we experimentally demonstrate the metasurface in combination with the microfluidic chip for the sensing of the glucose solution concentration. Our findings offer a possible strategy for the existing manufactured metasurface to achieve quasi-BIC resonance and provide a promising candidate for approaching the spectral analysis of the biochemical.

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“…Different from the harmonic generation processes, the multiple incident frequencies are involved in FWM process, thus the simultaneous resonances of the incident frequencies are required to enhance the efficiency [35]. Although resonancebased enhanced THz FWM processes have been investigated in metamaterial platforms [29], the enhanced THz FWM processes by metamaterials with multiple simultaneous resonances have rarely been explored.…”

Section: Introductionmentioning

confidence: 99%

Enhanced terahertz frequency mixing in all-dielectric metamaterial with multiple surface plasmon polaritons resonances

Wang,

Yan,

Tian

et al. 2024

J. Phys. D: Appl. Phys.

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Nonlinear metamaterials hold a promising platform for generating terahertz (THz) waves. In this paper, we present an all-dielectric metamaterial with multiple surface plasmon polariton (SPP) resonances for enhanced THz frequency mixing. The metamaterial is composed of graphene ribbons, a dielectric layer, and a one-dimensional photonic crystal, displaying the multiple absorptions with simultaneous excitation of three SPP resonances. Taking advantage of SPP resonances with high Q factor and strong localized field at the input frequency, the third-order nonlinear processes are remarkably enhanced, including third-harmonic generation (THG) and four-wave mixing (FWM), producing a variety of frequencies in the THz range. The proposed efficient nonlinear metamaterials offer promising applications for THz frequency synthesis.

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High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum

Cited by 37 publications

References 48 publications

Thermally controlled electromagnetically induced transparency metamaterial through the near-field coupling of electric and toroidal resonances

Thermally controlled electromagnetically induced transparency metamaterial through the near-field coupling of electric and toroidal resonances

Coupling-Based Multiple Bound States in the Continuum and Grating-Assisted Permittivity Retrieval in the Terahertz Metasurface

Enhanced terahertz frequency mixing in all-dielectric metamaterial with multiple surface plasmon polaritons resonances

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