Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)4780-4786
Number of pages7
JournalNano Letters
Issue number11
Publication statusPublished - 2021 Jun 9
Externally publishedYes


  • chiral plasmonics
  • nanofemto scale
  • near-field imaging
  • photoemission electron microscopy
  • ultrafast optics

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


Dive into the research topics of 'Revealing the Chiroptical Response of Plasmonic Nanostructures at the Nanofemto Scale'. Together they form a unique fingerprint.

Cite this