Čerenkov radiation in vacuum from a superluminal grating
arXiv:2105.13681 · doi:10.1103/PhysRevResearch.4.013064
Abstract
Nothing can physically travel faster than light in vacuum. This is why it has been considered that there is no Čerenkov radiation (ČR) without an effective refractive index due to some background field. In this Letter, we theoretically predict ČR in vacuum from a spatiotemporally modulated boundary. We consider the modulation of traveling wave type and apply a uniform electrostatic field on the boundary to generate electric dipoles. Since the induced dipoles stick to the interface, they travel at the modulation speed. When the grating travels faster than light, it emits ČR. In order to quantitatively examine this argument, we need to calculate the field scattered at the boundary. We utilise a dynamical differential method, which we developed in the previous paper, to quantitatively evaluate the field distribution in such a situation. We can confirm that all scattered fields are evanescent if the modulation speed is slower than light while some become propagating if the modulation is faster than light.
References in corpus (18)
- Photonic chip based optical frequency comb using soliton induced Cherenkov radiation
- Looking at a soliton through the prism of optical supercontinuum
- An Introduction to Graphene Plasmonics
- Broadband Nonreciprocal Amplification in Luminal Metamaterials
- Wood Anomalies and Surface-Wave Excitation with a Time-Grating
- Vacuum Cherenkov radiation in spacelike Maxwell-Chern-Simons theory
- Quantum Cherenkov Radiation and Non-contact Friction
- Dissipative Kerr solitons and Cherenkov radiation in optical microresonators with third order dispersion
- Surface Dyakonov-Cherenkov Radiation
- Effect of Cherenkov radiation on localized states interaction
- Casimir light in dispersive nanophotonics
- Cherenkov radiation from the quantum vacuum
- Two photon emission from superluminal and accelerating index perturbations
- Self-force on moving electric and magnetic dipoles: dipole radiation, Vavilov-Čerenkov radiation, friction with a conducting surface, and the Einstein-Hopf effect
- Calculating spatiotemporally modulated surfaces: a dynamical differential formalism
- Quasiclassical approach to synergic synchrotron-Cherenkov radiation in polarized vacuum
- Cherenkov radiation in a strong magnetic field
- Curvilinear coordinate Generalized Source Method for gratings with sharp edges