Application: Frequency and Polarization Transformer—Switched Medium in a Cavity

Kalluri, Dikshitulu K.

doi:10.1201/9781315218113-13

Cited by 8 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas, the wave number is conserved and frequency changes due to a temporal discontinuity in spatially invariant media. Specifically, it can be written as ω 1 ≠ ω r = ω t and k 0 = k 1 (Kalluri, 2016). Then after the instant t 0 , the wave becomes bold-italicE2=bold-italicE2++bold-italicE2− =truee^xA1 exp⁡[i(ω2t−k0z)]+truee^xA2 exp⁡[i(−ω2t−k0z)].…”

Section: Theorymentioning

confidence: 99%

“…The reflection and transmission of EMWs were discussed theoretically at a temporal boundary when the permittivity and permeability of media change with time (Xiao et al , 2014; Mendonça and Shukla, 2002; Hayrapetyan et al , 2017). In rapidly created plasmas that are dispersive media, the transmission and reflection of EMWs at a temporal boundary have been investigated (Kalluri and Goteti, 1992; Cirone et al ,1997; Kalluri, 2016). Bakunov and Maslov (2014) discussed the most fundamental differences of EMWs’ reflection and transmission in dispersive media and linear time-varying nondispersive media.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temporal reflection of electromagnetic waves in simple polar-molecule reactions

Liu

Yan

2019

COMPEL

View full text Add to dashboard Cite

Purpose The purpose of this paper is to present the temporal reflection of electromagnetic waves (EMWs) in simple polar-molecule reactions whose polarization changes with the proceeding of the reactions. Design/methodology/approach At a temporal boundary, based on the continuity of the electric displacement and magnetic induction, the reflected condition of EMWs is obtained, and the expression of the transmission and reflection coefficients in the reactions is derived. Subsequently, a one-dimensional model is used to validate the reflected condition and expression. Findings If the time scale of the component concentration variation is greater than the wave period, the polarization of the reactions at a temporal boundary is continuous. The reflection does not happen. On the other hand, when the time scale of the component concentration variation is smaller than the wave period, the polarization is not continuous at a temporal boundary. The impedance of the reactions at the temporal boundary changes and the reflection occurs. Originality/value The results may be helpful in disclosing the non-uniform distribution of EMWs in chemical reactions.

show abstract

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temporal reflection of electromagnetic waves in simple polar-molecule reactions

Liu

Yan

2019

COMPEL

View full text Add to dashboard Cite

show abstract

“…Light scattering at a temporal boundary is commonly treated within the framework of macroscopic electrodynamics using appropriate continuity conditions at the boundary. The continuity conditions depend on the medium model being, for example, different for nondispersive dielectrics [30][31][32], plasmas [33][34][35][36][37], and Lorentz media [36][37][38], fact not always recognized in the literature [39]. Some subtle issues related to the temporal boundary models were recently discussed in references [40,41].…”

Section: Introductionmentioning

confidence: 99%

“…According to the macroscopic approach [33][34][35][36][37], the transformation results in the excitation of two frequency upshifted waves, propagating in the opposite directions, and a zero-frequency non-propagating mode. This poses an intriguing question: how can a superposition of elementary waves from the individual electrons born in the field of the initial wave produce the frequency shifted waves?…”

Section: Introductionmentioning

confidence: 99%

Extinction theorem for a temporal gas-plasma boundary

Бакунов

2022

New J. Phys.

View full text Add to dashboard Cite

Temporal discontinuity in a medium's dielectric properties (temporal boundary) is a useful model for considering electromagnetic phenomena in dynamic materials and metamaterials. Here a counterpart of the Ewald-Oseen extinction theorem of classical optics is derived for light scattering at a temporal boundary. In particular, it is shown that the extinction of the initial electromagnetic wave and its replacement by the frequency shifted waves at a temporal gas-plasma boundary can be understood as a result of a superposition of the elementary waves scattered by the suddenly appeared individual free electrons. In contrast to the classical extinction theorem, the extinction at a temporal boundary is closely related to causality and transient effects; at any point the electromagnetic field is formed by the elementary waves arriving from a sphere expanding with the speed of light.

show abstract

“…The propagation of waves in time-varying media where the medium parameters vary as a function of time is an old topic that has been studied extensively in many branches of physics and engineering [1][2][3][4]. Since quantum particles can be described by wave equations such as the Schrödinger, Dirac, and Klein-Gordon equations in many physical situations, this topic is also relevant for the study of quantum materials as well as of the propagation of classical waves.…”

Section: Introductionmentioning

confidence: 99%

A Study on Character Education Policy in Korea through System Theory

Kim¹

2019

Korea Univ Inst Educ Res

View full text Add to dashboard Cite

We investigate the influence of the temporal variations of various medium parameters on the propagation of Dirac-type waves in materials where the quasiparticles are described by a generalized version of the pseudospin-1/2 Dirac equation. Our considerations also include the propagation of electromagnetic waves in metamaterials with the Dirac-type dispersion. We focus on the variations of the scalar and vector potentials, mass, Fermi velocity, and tilt velocity describing the Dirac cone tilt. We derive the scattering coefficients associated with the temporal interfaces and slabs analytically and find that the temporal scattering is caused by the changes of the mass, Fermi velocity, and vector potential, but does not arise from the changes of the scalar potential and tilt velocity. We also explore the conditions under which the temporal Brewster effect and total reflection occur and calculate the change in total wave energy. We examine bilayer Dirac temporal crystals where parameters switch between two different sets of values periodically and prove that these systems do not have momentum gaps. Finally, we assess the potential for observing these temporal scattering effects in experiments.

show abstract

Application: Frequency and Polarization Transformer—Switched Medium in a Cavity

Cited by 8 publications

References 0 publications

Temporal reflection of electromagnetic waves in simple polar-molecule reactions

Temporal reflection of electromagnetic waves in simple polar-molecule reactions

Extinction theorem for a temporal gas-plasma boundary

A Study on Character Education Policy in Korea through System Theory

Contact Info

Product

Resources

About