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Title: Splashing transients of 2D plasmons launched by swift electrons
Authors: Lin, Xiao
Kaminer, Ido
Shi, Xihang
Gao, Fei
Yang, Zhaoju
Gao, Zhen
Buljan, Hrvoje
Joannopoulos, John D.
Soljačić, Marin
Chen, Hongsheng
Zhang, Baile
Keywords: 2D plasmons
Transition Radiation
Issue Date: 2017
Source: Lin, X., Kaminer, I., Shi, X., Gao, F., Yang, Z., Gao, Z., et al. (2017). Splashing transients of 2D plasmons launched by swift electrons. Science Advances, 3(1), e1601192-.
Series/Report no.: Science Advances
Abstract: Launching of plasmons by swift electrons has long been used in electron energy–loss spectroscopy (EELS) to investigate the plasmonic properties of ultrathin, or two-dimensional (2D), electron systems. However, the question of how a swift electron generates plasmons in space and time has never been answered. We address this issue by calculating and demonstrating the spatial-temporal dynamics of 2D plasmon generation in graphene. We predict a jet-like rise of excessive charge concentration that delays the generation of 2D plasmons in EELS, exhibiting an analog to the hydrodynamic Rayleigh jet in a splashing phenomenon before the launching of ripples. The photon radiation, analogous to the splashing sound, accompanies the plasmon emission and can be understood as being shaken off by the Rayleigh jet–like charge concentration. Considering this newly revealed process, we argue that previous estimates on the yields of graphene plasmons in EELS need to be reevaluated.
ISSN: 2375-2548
DOI: 10.1126/sciadv.1601192
Rights: © 2017 The Authors. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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