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Author Zhao, Weiwei ♦ Li, Mei ♦ Zhang, Yan ♦ Bi, Kedong ♦ Chen, Yunfei ♦ Wu, Qisheng ♦ Hao, Qi ♦ Wang, Jinlan ♦ Ni, Zhenhua
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ADSORPTION ♦ COUPLING ♦ EXCITATION ♦ GOLD ♦ NANOPARTICLES ♦ NANOSTRUCTURES ♦ PHONONS ♦ PLASMONS ♦ RAMAN SPECTRA ♦ RESONANCE ♦ SILVER ♦ SPIN ♦ SURFACES ♦ TUNGSTEN SULFIDES ♦ TWO-DIMENSIONAL SYSTEMS
Abstract The excitation of plasmon in metallic nanostructures produces intense and strongly localized near fields that enhance light-matter interaction. Here, we report plasmon–phonon coupling in monolayer WS{sub 2} deposited with gold and silver nanoparticles. The Raman spectra reveal phonon modes arising from the coupling between plasmon and WS{sub 2}. The localized surface plasmon resonance mediated excitation activates the Raman process without requiring defect for momentum conservation. Our results also reveal that the momentum induced by localized surface plasmon resonances losses to WS{sub 2} and the metal atoms adsorption modulated spin–orbit split are the two essential elements for the observed plasmon–phonon coupling. This work will open up exciting prospects for plasmon–phonon coupling in two dimensional systems.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-28
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 13


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