Trapping of an electromagnetic wave by the boundary of a time-varying plasma

Бакунов, М. И.; Maslov, A. V.

doi:10.1103/physreve.57.5978

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…Part of the initial wave energy was shown to be trapped by the boundary via transformation into frequency down-shifted surface waves as a result of transient processes. Later, the phenomenon of trapping was confirmed by Bakunov and Maslov 7,8 for the case of oblique incidence of the electromagnetic wave on the boundary of a time-varying plasma half-space. The trapping of an electromagnetic wave by a nonstationary plasma layer was studied in Ref.…”

Section: Introductionmentioning

confidence: 80%

Transient input of an electromagnetic wave into an open waveguide coated with nonstationary plasma film

Бакунов¹,

Maslov

1998

Journal of Applied Physics

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A technique to input an electromagnetic wave into an open planar waveguiding structure is presented. That is, we propose to coat the waveguide with a thin semiconductor film whose free electron density is controlled by laser pulses. The transient processes which follow the electron density shift in the coating film give rise to the effective coupling between the incident electromagnetic wave and local modes of the waveguiding structure and consequently lead to the creation of the guided modes. We analyze frequencies and amplitudes of the excited guided waves as well as characteristics of the transient radiation from the coating film. Due to the relative simplicity, small size, and as a result fast temporal response, the proposed scheme may find application as a part of integrated circuits for the submillimeter wave range.

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Section: Introductionmentioning

confidence: 80%

Transient input of an electromagnetic wave into an open waveguide coated with nonstationary plasma film

Бакунов¹,

Maslov

1998

Journal of Applied Physics

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“…The most common techniques in the electrodynamics of nonstationary media implement either the introduction of dimensionless timelike variables in Maxwell's or wave equations [38][39][40], integral equations [41][42][43], or eikonal equations [44]. Here, we use an approach which is commonly used for solving plasma physics tasks [26,35,45].…”

Section: A Amplitude Relations For Scattered Wavesmentioning

confidence: 99%

Temporally modulated metamaterial based on a multilayer graphene structure

Masyukov

Grebenchukov²

2021

Phys. Rev. B

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The recently developed concept of time-varying metamaterials paves the way for advanced methods of electromagnetic property modulation, such as magnet-free isolators, frequency converters, and other nonreciprocal photonic components. Here, we analyze the metamaterial based on the periodically arranged temporally modulated graphene layers via a steplike graphene Fermi level. The material properties are described by the effective medium theory. The electromagnetic wave temporal scattering phenomenon caused by rapid steplike graphene Fermi level switching is considered. It is demonstrated that the frequency of scattered waves increases as the Fermi level grows rapidly and vice versa. The relation between the amplitudes of forward-and backward-scattered waves is found using the Laplace transform technique. The proposed concept allows us to efficiently generate frequency harmonics under instant switching of the graphene Fermi level at a few meV. Our investigation provides a basement for the realization of temporally modulated multilayer structures based on functional tunable materials as power-efficient frequency converters.

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“…In the case of free carrier generation [µ Ω (t) > 0, µ r = 0] and weak collisions (ν ≪ µ Ω ), adiabatic invariant in the form of equation ( 18) is applicable. According to equation (18),…”

Section: Graphene In a Homogeneous Dielectric Environmentmentioning

confidence: 99%

“…Electromagnetic phenomena in systems with time-dependent dielectric properties are of interest both in view of mimicking the fundamental physics effects, such as cosmological expansion, Hawking radiation, or dynamical Casimir effect [1][2][3][4], and also in view of developing novel devices of active photonics and active plasmonics for spectral and temporal shaping of light fields [5][6][7][8][9][10][11]. System nonstationarity can give rise to a variety of specific dynamical effects [12][13][14][15][16][17][18][19][20][21][22][23][24], such as frequency shifting, non-conservation of wave energy, reciprocity breaking, generation of dc motion of carriers, reflection at the temporal boundaries, temporal scattering of surface waves to bulk radiation and vice versa.…”

Section: Introductionmentioning

confidence: 99%

Adiabatic invariants for surface plasmons on temporally dynamic graphene

Бакунов¹,

Shirokova²,

Maslov³

2020

J. Opt.

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For surface plasmons on graphene in an arbitrary dielectric environment, combinations of the plasmon energy and frequency (adiabatic invariants) that are conserved during slow time-variations of the graphene free carrier density are obtained. The invariants allow one to find the plasmon energy changes directly from the frequency shift without solving a dynamic equation. The invariants have a different form in the cases of increasing and decreasing carrier density. In both cases, however, they predict that plasmon frequency shifting is accompanied by a decrease of the plasmon energy.

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Trapping of an electromagnetic wave by the boundary of a time-varying plasma

Cited by 10 publications

References 23 publications

Transient input of an electromagnetic wave into an open waveguide coated with nonstationary plasma film

Transient input of an electromagnetic wave into an open waveguide coated with nonstationary plasma film

Temporally modulated metamaterial based on a multilayer graphene structure

Adiabatic invariants for surface plasmons on temporally dynamic graphene

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