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The Remote Light Emission Modulated by Local Surface Plasmon Resonance for the CdSe NW–Au NP Hybrid Structure
Author(s) -
He Jingru,
Li Jing,
Xia Jing,
Tian Lifeng,
Jin Binbin,
Zhou Shaomin,
Sun Mengtao,
Meng Xiangmin
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201801418
Subject(s) - materials science , surface plasmon resonance , exciton , photoluminescence , plasmon , optoelectronics , semiconductor , surface plasmon , localized surface plasmon , light emission , coupling (piping) , excited state , nanoparticle , quantum dot , nanotechnology , atomic physics , condensed matter physics , physics , metallurgy
CdSe nanowire (NW)–Au nanoparticle (NP) compounds are synthesized successfully using the method of physical vapor deposition, and the modulated remote emission is realized in the hybrid structure with strong metal–semiconductor coupling. The well‐crystallized, uniform morphology, smooth surface CdSe NW is attached with an Au NP on the terminal, which forms the integration structure with direct plasmon–exciton coupling of semiconductor–metal hybrid system. When the CdSe terminal or Au NP terminal of the hybrid structure is excited by the laser with wavelength of 633 nm, the remote light emission at another terminal is greatly modulated. To reveal the physical mechanism of energy conviction between plasmon and exciton, finite‐difference time‐domain simulations are performed for the CdSe NW–Au NP hybrid structures. The calculated results confirm that the modulation of remote light emission is attributed to the competing of the quench of photoluminescence and the electric field enhancement of local surface plasmon resonance. These works can provide deeper understanding of physical mechanism of plasmon and exciton coupling, and open up new application for the remote light sensing and detection.