Space-Time Wave Packets from Smith-Purcell Radiation.

ABSTRACT: Space-time wave packets are electromagnetic waves with strong correlations between their spatial and temporal degrees of freedom. These wave packets have gained much attention for fundamental properties like propagation invariance and user-designed group velocities, and for potential applications like optical microscopy, micromanipulation, and laser micromachining. Here, free-electron radiation is presented as a natural and versatile source of space-time wave packets that are ultra-broadband and highly tunable in frequency. For instance, ab initio theory and numerical simulations show that the intensity profile of space-time wave packets from Smith-Purcell radiation can be directly tailored through the grating properties, as well as the velocity and shape of the electron bunches. The resul

SUBMITTER: Tan YJ 

PROVIDER: S-EPMC8596120 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature