4.8 Article

Light-Triggered Reversible Tuning of Second-Harmonic Generation in a Photoactive Plasmonic Molecular Nanocavity

Journal

NANO LETTERS
Volume 23, Issue 12, Pages 5851-5858

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c04988

Keywords

host-guest molecular complex; metallic particle-on-film nanocavity; second-harmonic generation; quantum conductivity theory

Ask authors/readers for more resources

This research presents a photoswitchable molecule-sandwiched metallic particle-on-film nanocavity that can achieve light-controlled linear and nonlinear optical tuning. It has the potential for developing miniaturized integrated optical circuits for ultrafast all-optical information processing and communication.
The ultrasmall mode volume and ultralarge local field enhancement of compact plasmonic nanocavities have been widely explored to amplify a variety of optical phenomena at the nanoscale. Other than passively generating near-field enhance-ments, dynamic tuning of their intensity and associated nonlinear optical processes such as second-harmonic generation (SHG) play vital roles in the field of active nanophotonics. Here we apply a host-guest molecular complex to construct a photoswitchable molecule-sandwiched metallic particle-on-film nanocavity (MPoFN) and demonstrate both light-controlled linear and nonlinear optical tuning. Under alternating illumination of ultraviolet (UV) and visible light, the photoactive plasmonic molecular nanocavity shows reversible switching of both surface-enhanced Raman scattering (SERS) and plasmon resonance. Surprisingly, we observe more significant modulation of SHG from this photoactive MPoFN, which can be explained qualitatively by the quantum conductivity theory (QCT). Our study could pave the way for developing miniaturized integrated optical circuits for ultrafast all-optical information processing and communication.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available