穿过光线线。（不过此表述在医学语境中不太常见，可能存在信息不准确的情况，你可确认原文是否准确完整）

Crossing the light line.

作者信息

Pendry John, Huidobro Paloma, Silveirinha Mario, Galiffi Emanuele

机构信息

Department of Physics, The Blackett Laboratory, Imperial College London, London, SW7 2AZ, UK.

Instituto de Telecomunicações, Instituto Superior Técnico-University of Lisbon, Avenida Rovisco Pais 1, Lisboa, 1049-001, Portugal.

出版信息

Nanophotonics. 2021 Nov 16;11(1):161-167. doi: 10.1515/nanoph-2021-0570. eCollection 2022 Jan.

DOI:10.1515/nanoph-2021-0570

PMID:39635005

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11501261/

Abstract

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.

摘要

我们提出这样一个问题

“在以接近光速的速度进行合成运动的光栅中，布洛赫波会发生什么？” 首先，我们定义了一个恒定折射率（CRI）模型，在该模型中，布洛赫波在突破光障时仍能保持良好定义，然后展示其色散从负向正旋转360°，再旋转回负向。接下来，我们引入有效介质近似（EMA），然后将其细化为一个四波模型，该模型被证明具有很高的准确性。最后，利用布洛赫波来扩展一个光脉冲，我们证明当开启一个腔内光栅时，脉冲幅度会突然增大，并伴随着传播方向的反转。