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Development of a Theoretical Model for Strong-Field Photoemission in a 2-Dimensional Conducting Sheet
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Publication Year
2019-12-01
Journal
Journal of the Korean Physical Society
Publisher
Korean Physical Society
Citation
Journal of the Korean Physical Society, Vol.75 No.11, pp.882-886
Keyword
PhotoionizationTunnelingUltrafast processes
All Science Classification Codes (ASJC)
Physics and Astronomy (all)
Abstract
We propose a theoretical model simulating ultrafast electron emission at the edge of a two-dimensional conducting sheet due to a strong field tunneling process in the presence of a static electric field. Under the assumption of a charge distribution following the square root law associated with a Sommerfeld half plane, the electric field was found to exhibit square-root dependence. The electron emission yield was estimated based on a Fowler-Nordheim tunneling, from which the resultant current flow was calculated by using the quasi-classical model. Importantly, we considered the number of the recoil electrons that do not contribute to the net current. We found a large variation in the nonlinearity of the power-dependence of the net field-emission yield; this is due to the combined contributions of the laser field irradiation and a static electric field. The validity of our model was confirmed based on experimental results obtained using devices with a nanometer-sized gap fabricated on a single layer of graphene.
ISSN
1976-8524
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/31057
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85076437096&origin=inward
DOI
https://doi.org/10.3938/jkps.75.882
Journal URL
http://www.springer.com/physics/journal/40042
Type
Article
Funding
This research was supported by Hallym University Research Fund, 2018 (HRF-201812-018).This research was supported by Hallym University Research Fund, 2018 (HRF-201812-018).
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Ahn, Yeonghwan Image
Ahn, Yeonghwan안영환
Department of Physics
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