Numerical study on the modulation of THz wave propagation by collisional microplasma photonic crystal

Wu, Shuqun; Chen, Yuxiu; Liu, Minge; Yang, Lu; Zhang, Chaohai; Liu, Shaobin

doi:10.1088/2058-6272/abb077

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…is considered, where ( ) E r is the electric field at position r, k is wave vector and w is the angular frequency. From Maxwell's equations, the propagation of electromagnetic waves in terms where w pe is the plasma frequency with w e = ( ) e n m pe 2 e 0 1 2 [39]. n e is the electron density, which is generally in an order of -10 cm 14 3 to -10 cm 15 3 under the experimental conditions we employed here [40,41].…”

Section: Resultsmentioning

confidence: 99%

Tunable triangular and honeycomb plasma structures in dielectric barrier discharge with mesh-liquid electrodes

Fan

Hou

Tian

et al. 2021

Plasma Sci. Technol.

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We demonstrate a method to generate tunable triangular and honeycomb plasma structures via dielectric barrier discharge with uniquely designed mesh-liquid electrodes. A rapid reconfiguration between the triangular lattice and honeycomb lattice has been realized. Novel structures comprised of triangular plasma elements have been observed and a robust angular reorientation of the triangular plasma elements with θ = π / 3 is suggested. An active control on the geometrical shape, size and angular orientation of the plasma elements has been achieved. Moreover, the formation mechanism of different plasma structures is studied by spatial-temporal resolved measurements using a high-speed camera. The photonic band diagrams of the plasma structures are calculated by use of finite element method and two large omnidirectional band gaps have been obtained for honeycomb lattices, demonstrating that such plasma structures can be potentially used as plasma photonic crystals to manipulate the propagation of microwaves. The results may offer new strategies for engineering the band gaps and provide enlightenments on designing new types of 2D and possibly 3D metamaterials in other fields.

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Section: Resultsmentioning

confidence: 99%

Tunable triangular and honeycomb plasma structures in dielectric barrier discharge with mesh-liquid electrodes

Fan

Hou

Tian

et al. 2021

Plasma Sci. Technol.

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“…The permeability µ r (r) = 1, the dielectric conductivity σ = 0, and the relative dielectric constant ε r (r) can be expressed as ε g in neutral gas (ε g = 1) and ε p in plasma regions, written as [39]…”

Section: Photonic Band Diagrams Of Honeycomb Latticesmentioning

confidence: 99%

Spatiotemporally controllable honeycomb superlattice plasma photonic crystals in dielectric barrier discharge

et al. 2023

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We present the experimental realization of tunable honeycomb superlattice plasma photonic crystals (PPCs) in dielectric barrier discharge by utilizing mesh-liquid electrodes. Fast reconfiguration among the simple honeycomb lattice, honeycomb superlattice, and honeycomb-snowflake superlattice is achieved. A dynamic control on the sizes of center scattering elements in the honeycomb superlattice has been realized. A phenomenological activator-inhibitor reaction diffusion model is established to demonstrate the formation and transition of the honeycomb superlattice. The simulations reproduce well the experimental observations. The photonic band diagrams of different honeycomb PPCs are studied by using finite element method. The addition of large center elements in the honeycomb superlattice yields remarkable omnidirectional band gaps that are about 2.5 times larger than the simple honeycomb lattice case. We propose an effective scheme to fabricate spatiotemporally controllable honeycomb lattices that enable great improvement in band gap size and dynamic control of microwave radiations for wide applications.

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“…This successfully exploited the merits of plasma and dielectric photonic crystals. Because of the tunable and reconfigurable properties of plasma, the study of plasma photonic crystals has been extended from microwave to terahertz bands, and the research dimension has also been extended from one-dimension to three-dimension theoretically [6,7]. In the experiment, Sakai constructed twodimensional plasma photonic crystals in experiments that included plasma columns generated by the dielectric barrier discharge and the background air.…”

Section: Introductionmentioning

confidence: 99%

Valley-dependent topological edge states in plasma photonic crystals

Zhou

Yao

et al. 2023

Plasma Sci. Technol.

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Plasma photonic crystals designed in this paper are composed of gas discharge tubes to control the flow of electromagnetic waves. The band structures calculated by the finite element method are consistent with the experimental results in that two distinct attenuation peaks appear in the ranges of 1 GHz to 2.5 GHz and 5 GHz to 6 GHz. The electromagnetic parameters of the plasma are extracted by the Nicolson-Ross-Weir method and effective medium theory. The measured electron density is between 1×1011cm-3 and 1×1012cm-3, which verifies the correctness of the parameter used in the simulation, and the collision frequency is near 1.5×1010Hz. As the band structures are corroborated by the measured scattering parameters, we introduce the concept of photonic topological insulator based on the quantum Valley Hall Effect into the plasma photonic crystal. A valley-dependent plasma photonic crystal with hexagonal lattice is constructed, and the phase transition of the valley K(K') occurs by breaking the spatial inversion symmetry. Valley-spin locked topological edge states are generated and excited by chiral sources. Furthermore, the frequency of the non-bulk state can be dynamically regulated by the electron density. This concept paves the way for novel, tunable topological edge states. More interestingly, the Dirac cone is broken when the electron density increases to 3.1×1012cm-3

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Numerical study on the modulation of THz wave propagation by collisional microplasma photonic crystal

Cited by 9 publications

References 35 publications

Tunable triangular and honeycomb plasma structures in dielectric barrier discharge with mesh-liquid electrodes

Tunable triangular and honeycomb plasma structures in dielectric barrier discharge with mesh-liquid electrodes

Spatiotemporally controllable honeycomb superlattice plasma photonic crystals in dielectric barrier discharge

Valley-dependent topological edge states in plasma photonic crystals

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