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Proceedings Paper

Near-field imaging and revealing dynamics of ultrafast surface plasmons using photoemission electron microscopy
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Paper Abstract

The precise understanding of the spatiotemporal characteristics of ultrafast surface plasmons is a prerequisite for applications of plasmonics. Here, we report on the investigation of near-field imaging and dynamics of propagating and localized surface plasmons (PSPs and LSPs) using photoemission electron microscopy (PEEM) of the trench on the silver film and gold bowtie nanostructure. The actual propagation direction of PSPs is directly obtained by reading PEEM images via the non-collinear exciting method by the trench. The results have demonstrated that the trench structure is potential as a 2D plasmonic dispersion element. Moreover, we experimentally obtain different LSPs dephasing times in the tips of the bowtie nanostructure by interferometric time-resolved PEEM. Experimental result reveals the dynamics of the LSP field initially oscillate at the laser field frequency and finally develop into its eigenfrequency after experiencing a few periods of frequency fluctuation.

Paper Details

Date Published: 18 November 2019
PDF: 8 pages
Proc. SPIE 11194, Plasmonics IV, 111940M (18 November 2019); doi: 10.1117/12.2537273
Show Author Affiliations
Yulu Qin, Changchun Univ. of Science and Technology (China)
Boyu Ji, Changchun Univ. of Science and Technology (China)
Xiaowei Song, Changchun Univ. of Science and Technology (China)
Yang Xu, Changchun Univ. of Science and Technology (China)
Jingquan Lin, Changchun Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 11194:
Plasmonics IV
Hongxing Xu; Satoshi Kawata; Min Qiu, Editor(s)

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