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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
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Nonlinear plasmon-exciton coupling enhances sum-frequency generation from a hybrid metal/semiconductor nanostructure.
Jin-Hui Zhong1, Jan Vogelsang2,3, Jue-Min Yi1
1Institute of Physics, Carl von Ossietzky University, 26111, Oldenburg, Germany.
Nature Communications
|March 21, 2020
Summary
Metallic nanoantennas coupled with quantum emitters boost coherent harmonic generation. This study explores ultrafast dynamics in gold nanosponges with zinc oxide emitters, revealing enhanced nonlinear optical emission.
Area of Science:
- Plasmonics
- Quantum Optics
- Materials Science
Background:
- Metallic nanoantennas enhance quantum emitter properties.
- Ultrafast dynamics in plasmon-emitter systems are underexplored.
- Coherent harmonic generation is a key nonlinear optical process.
Purpose of the Study:
- Investigate ultrafast optical dynamics in plasmon-emitter hybrid systems.
- Explore nonlinear optical emission from individual porous gold nanosponges infiltrated with zinc oxide (ZnO) emitters.
- Uncover quantum pathways of plasmon-exciton coupling.
Main Methods:
- Interferometric probing of nonlinear optical emission.
- Few-femtosecond time-resolved photoelectron emission microscopy.
- Analysis of two-dimensional spectra correlating plasmonic excitations and excitonic emissions.
Main Results:
- Identified multiple long-lived localized plasmonic hot spot modes on gold nanosponges.
- Observed coupling between plasmonic near-field and ZnO excitons.
- Demonstrated enhanced sum-frequency generation and resonant excitonic emission from individual hot spots.
Conclusions:
- Plasmon-exciton coupling significantly enhances nonlinear optical processes.
- Ultrafast dynamics reveal opportunities for controlling optical nonlinearities.
- Hybrid plasmon-nanosponge-emitter systems offer new avenues for photonic applications.
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