文章基本信息

标题：Crossing the light line
本地全文：下载
作者：Pendry John ; Pendry John ; Huidobro Paloma 等
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2021
卷号：11
期号：1
页码：161-167
DOI：10.1515/nanoph-2021-0570
语种：English
出版社：Walter de Gruyter GmbH
摘要：We ask the question “what happens to Bloch waves in gratings synthetically moving at near the speed of light?”. First we define a constant refractive index (CRI) model in which Bloch waves remain well defined as they break the light barrier, then show their dispersion rotating through 360° from negative to positive and back again. Next we introduce the effective medium approximation (EMA) then refine it into a 4-wave model which proves to be highly accurate. Finally using the Bloch waves to expand a pulse of light we demonstrate sudden inflation of pulse amplitude combined with reversal of propagation direction as a luminal grating is turned on.