Reflection and transmission of electromagnetic waves at a moving magnetoplasma half‐space

Abstract

The interaction of an electromagnetic wave with a plane interface between a stationary isotropic medium (dielectric or vacuum) and a homogeneous cold magnetized plasma moving uniformly parallel to the interface is considered for arbitrary angles of incidence. Calculations are presented for the case in which the static magnetic field lies in the interface and is oriented normal to both the plane of incidence and the direction of the streaming motion. It is found that the reflection and the transmission characteristics for an incident E wave are unaffected by the anisotropy and the velocity of the moving medium. Numerical results for the reflection and the transmission coefficients for an obliquely incident H wave have been obtained for several values of the magnetic field and the electron density of the moving plasma half‐space. It is found that the moving magnetized plasma medium allows certain stop and pass bands under suitable physical conditions.

Photonics of time-varying media

“…One of the most intriguing phenomena arising at a temporal discontinuity is the wave scattering dual to that occurring at spatial interfaces, producing forward and backward waves in time, rather than waves reflected and transmitted in space. 16,[19][20][21][22][23] The scattering coefficients can be found by applying the above temporal boundary conditions. Consider a monochromatic plane wave traveling in an unbounded, homogeneous, isotropic, nondispersive but time-varying medium.…”

Photonics of Time-Varying Media

“…One of the most intriguing phenomena that the temporal discontinuity in a medium brings about is that it can scatter waves in a way dual to spatial interfaces, producing forward and backward waves in time, rather than waves reflected and transmitted in space. 16,[19][20][21][22][23] The scattering coefficients can be found by applying the above temporal boundary conditions. Consider a monochromatic plane wave traveling in an unbounded, homogeneous, isotropic, non-dispersive but time-varying medium.…”

“…Interestingly, the constitutive relations (22) in the new coordinate system are reminiscent of those of a moving dielectric medium. 139 Due to this feature the electrodynamics of spacetime media with travelling wave modulations bears many similarities to the electrodynamics of moving bodies.…”

“…( 22). Thus, the original constitutive relations (20) are indistinguishable from those of a hypothetical moving system with a bianisotropic response in the co-moving frame of the type (22). In other words, the synthetic motion provided by the travelling wave modulation imitates the actual physical motion of a fictitious time-invariant bianisotropic crystal [Fig.…”

Efficient Phase Conjugation in a Space-Time Leaky Waveguide

“…Most studies in this context have been focusing on periodic temporal modulations, which are associated with a variety of intriguing electromagnetic phenomena, such as nonreciprocity and parametric wave mixing. − Recently, there has been a surge of interest in abrupt temporal changes in the material properties of infinite media. The theoretical investigation of these temporal discontinuities dates back to more than half a century ago − and has been recently revived in the metamaterials community, with the discovery that time switching can offer a new dimension for wave engineering. − In unbounded media, an abrupt switching event of the material properties in time corresponds to the dual of a spatial interface between two media, since at such a time interface momentum is conserved, but frequency can change. Wave scattering at a single temporal discontinuity has been extensively studied in various forms, also involving anisotropy, , material dispersion, − and broken spatial symmetries. − …”