Kansai Photon Science Institute >> KPSI Seminar >> Scattering from “a space-time grating” Asymmetric diffraction and Vavilov-Čerenkov radiation
Seminar
The 86th KPSI Seminar（real×web holding）
Scattering from “a space-time grating” Asymmetric diffraction and Vavilov-Čerenkov radiation
| Presentor | OUE Daigo （The Blackett Laboratory, Imperial College London） |
|---|---|
| Date | 11:00-（FRI) Apr 15, 2022 |
| Venue | Room A119（and online） |
| Language | Japanese |
| abstract | [PDFファイル／394KB] |
Scattering from “a space-time grating” Asymmetric diffraction and Vavilov-Čerenkov radiation
OUE Daigo
（The Blackett Laboratory, Imperial College London）
abstract
Scattering is one of the fundamental processes in wave physics. We recognise various objects via the scattered light. It is well-known that the spatial modulation of a medium brings about diffraction patterns when it is illuminated. The diffraction phenomena have been utilised for spectroscopy, microscopy, communication, etc. What happens if we have modulation not only in space but also in time? Since the temporal modulation breaks time-translational symmetry, it could cause those which have no counterpart in static systems. In this seminar, we shall see how to analyse such a spatiotemporally modulated system and what happens there.
References
[1] D. Oue, K. Ding & J. B. Pendry “Calculating spatiotemporally modulated surfaces: A dynamical differential formalism.” Phys. Rev. A 104, 013509 (2021).
[2] D. Oue, K. Ding & J. B. Pendry “Čerenkov radiation in vacuum from a superluminal grating.” Phys. Rev. Res. 4, 013064 (2022).
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