|
Hokkaido University Collection of Scholarly and Academic Papers >
Research Institute for Electronic Science >
Peer-reviewed Journal Articles, etc >
Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale
This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
| Title: | Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale |
| Authors: | Zu, Shuai Browse this author | | Sun, Quan Browse this author →KAKEN DB | | Cao, En Browse this author | | Oshikiri, Tomoya Browse this author →KAKEN DB | | Misawa, Hiroaki Browse this author →KAKEN DB |
| Keywords: | chiral plasmonics | | photoemission electron microscopy | | ultrafast optics | | near-field imaging | | nanofemto scale |
| Issue Date: | 9-Jun-2021 |
| Publisher: | American Chemical Society |
| Journal Title: | Nano letters |
| Volume: | 21 |
| Issue: | 11 |
| Start Page: | 4780 |
| End Page: | 4786 |
| Publisher DOI: | 10.1021/acs.nanolett.1c01322 |
| Abstract: | 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. |
| Rights: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/82380 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
|
