Hot Electron Generation and Cathodoluminescence Nanoscopy of Chiral Split Ring Resonators
Artikel i vetenskaplig tidskrift, 2016

Three-dimensional chiral plasmonic nanostructures have been shown to be able to dramatically boost photon-spin selective light-matter interactions, potentially leading to novel photonics, molecular spectroscopy, and light-harvesting applications based on circularly polarized light. Here, we show that chiral split-ring gold nanoresonators interfaced to a wide band gap semiconductor exhibit a contrast in hot-electron transfer rate between left-handed and right-handed visible light that essentially mimics the far-field circular dichroism of the structures. We trace down the origin of this effect to the differential excitation of the thinnest part of the split-ring structures using dichroic-sensitive cathodoluminescence imaging with nanometer spatial resolution. The results highlight the intricate interplay between the near-field and far field chiral response of a nanostructure and establishes a clear link to the emerging field of hot carrier plasmonics with numerous potential applications in photocatalysis and solar light harvesting.

metal nanostructures

nanometer-scale

surface plasmons

light

growth

dichroic-sensitive

nanowires

energy-loss spectroscopy

colloidal

Chiral nanostructures

plasmonic nanostructures

lithography

antenna

hot electron generation

extinction

Författare

Yurui Fang

Chalmers, Fysik, Bionanofotonik

Ruggero Verre

Chalmers, Fysik, Bionanofotonik

Lei Shao

Chalmers, Fysik, Bionanofotonik

P. Nordlander

Rice University

Mikael Käll

Chalmers, Fysik, Bionanofotonik

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 16 5183-5190

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1021/acs.nanolett.6b02154

PubMed

27464003