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Proceedings Paper

Control and mapping ultrafast plasmons with PEEM
Author(s): Boyu Ji; Jiang Qin; Peng Lang; Alemayehu Nana Koya; Zuoqiang Hao; Xiaowei Song; Jingquan Lin
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Paper Abstract

We report the direct imaging of plasmon on the tips of nano-prisms in a bowtie structure excited by 7 fs laser pulses and probing of ultrafast plasmon dynamics by combining the pump-probe technology with three-photon photoemission electron microscopy. A series of images of the evolution of local surface plasmon modes on different tips of the bowtie are obtained by the time-resolved three-photon photoemission electron microscopy, and the result discloses that plasmon excitation is dominated by the interference of the pump and probe pulses within the first 13 fs of the delay time, and thereafter the individual plasmon starts to oscillate on its own characteristic resonant frequencies. On the other hand, control of the near-field distribution was realized by variation of the phase delay of two orthogonally polarized 200fs laser pulses. The experimental results of the optical near-field distribution control are well reproduced by finite-difference time-domain simulations and understood by linear combination of electric charge distribution of the bowtie by s- and p- polarized light illumination. In addition, an independent shift of the excitation position or the phase of the near-field can be realized by coherent control of two orthogonally polarized fs laser pulses.

Paper Details

Date Published: 3 November 2016
PDF: 11 pages
Proc. SPIE 10028, Plasmonics II, 100280G (3 November 2016); doi: 10.1117/12.2247717
Show Author Affiliations
Boyu Ji, Changchun Univ. of Science and Technology (China)
Jiang Qin, Changchun Univ. of Science and Technology (China)
Peng Lang, Changchun Univ. of Science and Technology (China)
Alemayehu Nana Koya, Changchun Univ. of Science and Technology (China)
Zuoqiang Hao, Changchun Univ. of Science and Technology (China)
Xiaowei Song, Changchun Univ. of Science and Technology (China)
Jingquan Lin, Changchun Univ. of Science and Technology (China)
International Research Ctr. for Nano Handling and Manufacturing of China (China)

Published in SPIE Proceedings Vol. 10028:
Plasmonics II
Hongxing Xu; Satoshi Kawata; David J. Bergman; Xing Zhu, Editor(s)

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