Wave Deflection and Shifted Refocusing in a Medium Modulated by a Superluminal Rectangular Pulse

Abstract

We explore the problem of scattering in a medium modulated by a superluminal rectangular pulse, with the pulse modulation realized through transverse excitations. We solve this problem in the moving frame where the modulation appears purely temporal, since the solution to a purely temporal modulation is known. Upon this basis, we use a graphical approach to find the angle and frequency of the wave scattered by the modulation under oblique incidence. This study reveals that superluminal modulations deflect plane waves retro-directively, and refocus cylindrical waves to a shifted point of space with respect to the original source.

5 pages, 5 figures.; Text modified, Title and abstract modified

References in corpus (2)

• Dynamics of light propagation in spatiotemporal dielectric structures
• Nonreciprocal Electromagnetic Scattering from a Periodically Space-Time Modulated Slab and Application to a Quasisonic Isolator

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