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Ultrafast Multiharmonic Plasmon Generation by Optically Dressed Electrons

Author(s)
Wong, Liang Jie; Rivera, Nicholas H.; Soljacic, Marin; Kaminer, Ido Efraim
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Abstract
Interactions between electrons and photons are a source of rich physics from atomic to astronomical scales. Here, we examine a new kind of electron-photon interaction in which an electron, modulated by light, radiates multiple harmonics of plasmons. The emitted plasmons can be femtosecond in duration and nanometer in spatial scale. The extreme subwavelength nature of the plasmons lowers the necessary input light intensity by at least 4 orders of magnitude relative to state-of-the-art strong-field processes involving bound or free electrons. The results presented here reveal a new means of ultrafast (10–1000 fs) interconversion between photonic and plasmonic energy, and a general scheme for generating spatiotemporally shaped ultrashort pulses in optical materials. More generally, our results suggest a route towards realizing analogues of fascinating physical phenomena like nonlinear Compton scattering in plasmonics and nanophotonics with relatively low intensities, slow electrons, and on nanometer length scales.
Date issued
2019-02
URI
http://hdl.handle.net/1721.1/120702
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Rivera, Nicholas et al. "Ultrafast Multiharmonic Plasmon Generation by Optically Dressed Electrons". Physical Review Letters 122, 5 (February 2019): 053901 © 2019 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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