Smith-Purcell Radiation from Low-Energy Electrons
Author(s)
Massuda, Aviram; Roques-Carmes, Charles; Yang, Yujia; Kooi, Steven E.; Yang, Yi; Murdia, Chitraang; Berggren, Karl K.; Kaminer, Ido; Soljacic, Marin; ... Show more Show less
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Recent advances in the fabrication of nanostructures and nanoscale features in metasurfaces offer new prospects for generating visible light emission from low-energy electrons. Here we present the experimental observation of visible light emission from low-energy free electrons interacting with nanoscale periodic surfaces through the Smith-Purcell (SP) effect. We demonstrate SP light emission from nanoscale gratings with periodicity as small as 50 nm, enabling the observation of tunable visible radiation from low-energy electrons (1.5 to 6 keV), an order of magnitude lower in energy than previously reported. We study the emission wavelength and intensity dependence on the grating pitch and electron energy, showing agreement between experiment and theory. Our results open the way to the production of SP-based nanophotonics integrated devices. Built inside electron microscopes, SP sources could enable the development of novel electron-optical correlated spectroscopic techniques and facilitate the observation of new quantum effects in light sources. ©2018
Date issued
2018-08Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of PhysicsJournal
ACS Photonics
Publisher
American Chemical Society (ACS)
Citation
Massuda, Aviram, et al., "Smith-Purcell Radiation from Low-Energy Electrons." ACS Photonics 5, 9 (August 2018): p. 3513-18 doi 10.1021/ACSPHOTONICS.8B00743 ©2018 Author(s)
Version: Author's final manuscript
ISSN
2330-4022