関西光科学研究所 >> KPSIセミナー >> バルク超伝導体の新しい応用 ー遮蔽電流制御による高度な磁場分布デザインー
セミナー
第86回KPSIセミナー(現地及びweb開催)
Scattering from “a space-time grating” Asymmetric diffraction and Vavilov-Čerenkov radiation
講演者 | 大上 能悟 The Blackett Laboratory, Imperial College London |
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日時 | 2022年4月15日(金曜日)11時00分~12時00分 |
会場 | A119室(およびオンライン) |
使用言語 | 日本語 |
要旨 | [PDFファイル/394KB] |
Scattering from “a space-time grating” Asymmetric diffraction and Vavilov-Čerenkov radiation
大上 能悟 The Blackett Laboratory, Imperial College London
概要
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).
[前の記事]
【現地及びweb開催】第85回KPSIセミナー バルク超伝導体の新しい応用 ー遮蔽電流制御による高度な磁場分布デザインー