Guided-mode resonances in flexible 2D terahertz photonic crystals

Kyaw, Chan; Yahiaoui, Riad; Chase, Zizwe A.; Tran, Vivian; Baydin, Andrey; Tay, Fuyang; Kono, Junichiro; Manjappa, Manukumara; Singh, Ranjan; Abeysinghe, Don C.; Urbas, Augustine; Searles, Thomas A.

doi:10.1364/optica.388761

Cited by 19 publications

(13 citation statements)

References 39 publications

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“…In addition, FW-BIC is completely switched off at ϕ = 90°which allows for ON/OFF cycling capability. The subwavelength nature of these metasurfaces allows for much smaller mode volume and lifts the dimensional limitations of dielectric photonic crystals 52 . The metadevices studied here have applications in lasing, nonlinear optics, and high-performance sensing devices.…”

Section: Discussionmentioning

confidence: 99%

Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

et al. 2020

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Bound states in the continuum (BICs) are widely studied for their ability to confine light, produce sharp resonances for sensing applications and serve as avenues for lasing action with topological characteristics. Primarily, the formation of BICs in periodic photonic band gap structures are driven by symmetry incompatibility; structural manipulation or variation of incidence angle from incoming light. In this work, we report two modalities for driving the formation of BICs in terahertz metasurfaces. At normal incidence, we experimentally confirm polarization driven symmetry-protected BICs by the variation of the linear polarization state of light. In addition, we demonstrate through strong coupling of two radiative modes the formation of capacitively-driven Freidrich-Wintgen BICs, exotic modes which occur in off-Γ points not accessible by symmetry-protected BICs. The capacitance-mediated strong coupling at 0° polarization is verified to have a normalized coupling strength ratio of 4.17% obtained by the Jaynes-Cummings model. Furthermore, when the polarization angle is varied from 0° to 90° (0° ≤ ϕ < 90°), the Freidrich-Wintgen BIC is modulated until it is completely switched off at 90°.

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Section: Discussionmentioning

confidence: 99%

Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

et al. 2020

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“…Recently, plasma media have been widely used in current photonic topological insulator studies [1][2][3], particularly in one-dimensional (1D) plasma photonic crystals (PhCs) [4][5][6][7], two-dimensional (2D) PhCs [8,9], and three-dimensional (3D) PhC construction. Nevertheless, owing to their complex design and manufacturing, the potential applications of topological photonics in 2D and 3D PhCs are very limited.…”

Section: Introductionmentioning

confidence: 99%

A Novel Lattice Boltzmann Scheme with Single Extended Force Term for Electromagnetic Wave Propagating in One-Dimensional Plasma Medium

Wang

et al. 2022

Electronics

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A one-dimensional plasma medium is playing a crucial role in modern sensing device design, which can benefit significantly from numerical electromagnetic wave simulation. In this study, we introduce a novel lattice Boltzmann scheme with a single extended force term for electromagnetic wave propagation in a one-dimensional plasma medium. This method is developed by reconstructing the solution to the macroscopic Maxwell’s equations recovered from the lattice Boltzmann equation. The final formulation of the lattice Boltzmann scheme involves only the equilibrium and one non-equilibrium force term. Among them, the former is calculated from the macroscopic electromagnetic variables, and the latter is evaluated from the dispersive effect. Thus, the proposed lattice Boltzmann scheme directly tracks the evolution of macroscopic electromagnetic variables, which yields lower memory costs and facilitates the implementation of physical boundary conditions. Detailed conduction is carried out based on the Chapman–Enskog expansion technique to prove the mathematical consistency between the proposed lattice Boltzmann scheme and Maxwell’s equations. Based on the proposed method, we present electromagnetic pulse propagating behaviors in nondispersive media and the response of a one-dimensional plasma slab to incident electromagnetic waves that span regions above and below the plasma frequency ωp, and further investigate the optical properties of a one-dimensional plasma photonic crystal with periodic thin layers of plasma with different layer thicknesses to verify the stability, accuracy, and flexibility of the proposed method.

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“…In recent years, plasma media have been widely used as photonic crystals [11][12][13][14] due to the tunability of the permittivity via various parameters, such as the plasma frequency and the plasma density, as well as the collision frequency at both the micrometer scale using the microplasma technique [15][16][17][18] and the millimeter scale using the low-temperature plasma technique [19]. Plasma PhCs provide additional freedom to reconfigure the DM and PBGs through customization of the plasma parameters.…”

Section: Introductionmentioning

confidence: 99%

A New Lattice Boltzmann Scheme for Photonic Bandgap and Defect Mode Simulation in One-Dimensional Plasma Photonic Crystals

Song

et al. 2022

Photonics

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A novel lattice Boltzmann method (LBM) with a pseudo-equilibrium potential is proposed for electromagnetic wave propagation in one-dimensional (1D) plasma photonic crystals. The final form of the LBM incorporates the dispersive effect of plasma media with a pseudo-equilibrium potential in the equilibrium distribution functions. The consistency between the proposed lattice Boltzmann scheme and Maxwell’s equations was rigorously proven based on the Chapman–Enskog expansion technique. Based on the proposed LBM scheme, we investigated the effects of the thickness and relative dielectric constant of a defect layer on the EM wave propagation and defect modes of 1D plasma photonic crystals. We have illustrated that several defect modes can be tuned to appear within the photonic bandgaps. Both the frequency and number of the defect modes could be tuned by changing the relative dielectric constant and thickness of the defect modes. These strategies would assist in the design of narrowband filters.

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Guided-mode resonances in flexible 2D terahertz photonic crystals

Cited by 19 publications

References 39 publications

Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

A Novel Lattice Boltzmann Scheme with Single Extended Force Term for Electromagnetic Wave Propagating in One-Dimensional Plasma Medium

A New Lattice Boltzmann Scheme for Photonic Bandgap and Defect Mode Simulation in One-Dimensional Plasma Photonic Crystals

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