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Title: Space-time wave packets from Smith-Purcell radiation
Authors: Tan, Yi Ji
Pitchappa, Prakash
Wang, Nan
Singh, Ranjan
Wong, Liang Jie
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2021
Source: Tan, Y. J., Pitchappa, P., Wang, N., Singh, R. & Wong, L. J. (2021). Space-time wave packets from Smith-Purcell radiation. Advanced Science, 8(22), 2100925-.
Project: A1984c0043
Journal: Advanced Science
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 result of this work indicates a viable way of generating space-time wave packets at exotic frequencies such as the terahertz and X-ray regimes, potentially paving the way toward new methods of shaping electromagnetic wave packets through free-electron radiation.
ISSN: 2198-3844
DOI: 10.1002/advs.202100925
DOI (Related Dataset): 10.21979/N9/X2M3MA
Schools: School of Physical and Mathematical Sciences 
School of Electrical and Electronic Engineering 
Organisations: A*STAR Graduate Academy
Institute of Microelectronics, A*STAR
Departments: Division of Physics and Applied Physics
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
Rights: © 2021 The Authors. Advanced Science published by Wiley-VCH GmbH.This is an open access article under the terms of the Creative CommonsAttribution License, which permits use, distribution and reproduction inany medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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