Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Kourtzanidis, Konstantinos; Raja, Laxminarayan L.

doi:10.1088/1361-6595/aa5fef

Cited by 12 publications

(12 citation statements)

References 49 publications

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“…In addition, it was observed in this study that the ratio of √ P 1 for metamolecule B to that for metamolecule A at 1 kPa was not as small as the inverse ratio of the numerically calculated local electric field enhancement factors. It has been pointed out in a previous paper [46] that the threshold incident power cannot be predicted in a simple way, which may be related to the present result. Therefore, it is also necessary to investigate a possibility of the suppression of decrease in the threshold incident power in the metamolecules with further shrunken capacitor structures for realizing a lower threshold incident power in the higher pressure region.…”

Section: Measurement Of Threshold Incident Power For Gas Dischargesupporting

confidence: 48%

Low-power threshold gas discharge by enhanced local electric field in electromagnetically-induced-transparency like metamolecules

Tamayama¹,

Yamada²

2021

J. Phys. D: Appl. Phys.

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To realize efficient nonlinear metamaterials, we investigate a method for enhancing the local electric field in a metamolecule composed of two radiatively coupled cut-wire resonators where resonance of the cut-wire resonators and low-group-velocity propagation of an incident electromagnetic wave simultaneously occurs. Numerical analysis shows that the local electric field in the metamolecule can be enhanced by decreasing the electrode size and the gap of the capacitor structure of the cut-wire resonators while keeping the equivalent electrical circuit parameters of the metamolecule constant. We measure and compare the threshold incident power for a gas discharge in a metamolecule fabricated in our previous study and that in a metamolecule with shrunken capacitor structures. The experiment reveals that shrinking the capacitor structure while keeping the resonance frequency of the metamolecule decreases the threshold incident power for a gas discharge and may increase the gas pressure where the threshold incident power is minimum. Further development of this work will enable us to realize efficient nonlinear metamaterials that have atmospheric-pressure gas as a nonlinear element.

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Section: Measurement Of Threshold Incident Power For Gas Dischargesupporting

confidence: 48%

Low-power threshold gas discharge by enhanced local electric field in electromagnetically-induced-transparency like metamolecules

Tamayama¹,

Yamada²

2021

J. Phys. D: Appl. Phys.

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“…CaTiO 3 is another candidate which has the dielectric permittivity of 172.5 with low loss tangent. Cylindrical and rectangular all-dielectric resonators fabricated with CaTiO 3 have been numerically and experimentally studied by [6,34,49] in which they presented microwave generated plasma discharge with high quality factors. This shows that depending on the choice of target operating mode or frequency, only the dielectric mat erial inside the perforations need to be replaced.…”

Section: Sspp Excitation Over a Finite Metasurfacementioning

confidence: 99%

Surface plasma discharge generated by spoof surface plasmon polariton excitation: a computational modeling study

Kim

Raja

2019

J. Phys. D: Appl. Phys.

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We discuss a computational modeling study of surface plasma generation by spoof surface plasmon polariton (SSPP) mode excitation of a corrugated metal surface. The SSPP mode is a highly localized electromagnetic wave propagating along the interface between a conductor and dielectric. The corrugations are defined by an array of rectangular cavities (comb structures) in the metal at the location of the interface. Spoof plasmon resonances occurring at each cavity couple with one another at the interface to produce localized surface wave structures whose wavelength can be much smaller than the incident wave. The electromagnetic wave structure for a finite length of the interface (metasurface) is analytically estimated and its correlation to the resonance frequency of the infinite metasurface is studied numerically. Strong local enhancement of the electromagnetic fields at the metasurface is used to initiate the plasma breakdown of pure argon gas at 10 Torr. Confined microdischarges produced initially at each of the comb structure evolve rapidly to create an extended structure of high density ~10 19 m −3 surface plasma whose properties are comparable to surface streamers generated in dielectric barrier discharges.

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“…A model coupling Maxwell's equations with quasineutral plasma fluid equations was frequently employed to describe the microwave volume breakdown. [19][20][21][22][23][24][25][26][27][28] These simulations seldom involved the boundary limit such as the dielectric surface, which can play a role in the breakdown on the atmosphere side of the dielectric surface. In this paper, we use the two-dimension model similar to those mentioned above in conjunction with the reasonable boundary condition of the dielectric surface to describe the HPM breakdown on the atmosphere side of the dielectric surface.…”

Section: Introductionmentioning

confidence: 99%

Space and time evolution of high-power microwave breakdown on the atmosphere side of the dielectric surface

Shu

2020

Jpn. J. Appl. Phys.

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The high-power microwave breakdown on the atmosphere side of the dielectric surface leads to the formation of the thin plasma layer. A twodimensional model coupling Maxwell's equations with quasi-neutral plasma fluid equations is used to study the breakdown evolution. We concentrate on the breakdown caused by the incident electric field parallel to the dielectric surface. The results show that the electric field enhancement at the tips of plasmoid in the direction parallel to the dielectric surface accelerates the propagation of the plasma front, while the propagation speed in the perpendicular direction decreases in time since the upstream plasma collapses the local electric field. The difference between the two speeds is responsible for the formation of the thin plasma layer. The effect of air pressure on the breakdown evolution is discussed. The breakdown delay time from simulations as a function of pressure shows the same trend as the experiment.

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Analysis and characterization of microwave plasma generated with rectangular all-dielectric resonators

Cited by 12 publications

References 49 publications

Low-power threshold gas discharge by enhanced local electric field in electromagnetically-induced-transparency like metamolecules

Low-power threshold gas discharge by enhanced local electric field in electromagnetically-induced-transparency like metamolecules

Surface plasma discharge generated by spoof surface plasmon polariton excitation: a computational modeling study

Space and time evolution of high-power microwave breakdown on the atmosphere side of the dielectric surface

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