Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale

Zu, Shuai; Sun, Quan; Cao, En; Oshikiri, Tomoya; Misawa, Hiroaki

Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale

Zu, Shuai; Sun, Quan; Cao, En et al.

Nano letters, 2021, 21(11), 4780-4786

Permalink : https://hdl.handle.net/2115/82380

このアイテムのアクセス数:501件（2026-10-07 19:57 集計）

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ファイル	フォーマット	サイズ	閲覧回数	説明
https://doi.org/10.1021/acs.nanolett.1c01322			30

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/82380
タイトル	Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale
著者	Zu, Shuai ; Sun, Quan ; Cao, En ; Oshikiri, Tomoya ; Misawa, Hiroaki
著者名 Zu, Shuai
e-Rad_Researcher 90727463 著者名 Sun, Quan
著者名 Cao, En
e-Rad_Researcher 60704567 著者名 Oshikiri, Tomoya
e-Rad_Researcher 30253230 著者名 Misawa, Hiroaki
言語	英語
キーワード	chiral plasmonics
	photoemission electron microscopy
	ultrafast optics
	near-field imaging
	nanofemto scale
発行日	2021-06-09
出版者	American Chemical Society
収録物名	Nano letters
巻(号)	21(11)
ページ	4780-4786
抄録	The spatiotemporal origin of plasmonic chiroptical responses in nanostructures remains unexplored and unclear. Here, two orthogonally oriented Au nanorods as a prototype were investigated, with a giant chiroptical response caused by antisymmetric and symmetric mode excitations for obliquely incident left-handed circular polarization (LCP) and right-handed circular polarization (RCP) light. Time-resolved photoemission electron microscopy (PEEM) was employed to measure the near-field spatial distributions, spectra, and spatiotemporal dynamics of plasmonic modes associated with the chiroptical responses at the nanofemto scale, verifying the characteristic near-field distributions at the resonant wavelengths of the two modes and a very large spectral dichroism for LCP and RCP. More importantly, eigenmode excitations and their contributions to the ultrafast plasmonic chiroptical response in the space-time domain were directly revealed, promoting a full understanding of the ultrafast chiral origin in complex nanostructures. These findings open a way to design chiroptical nanophotonic devices for spatiotemporal control of chiral light-matter interactions.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
PISSN	1530-6984
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1021/acs.nanolett.1c01322