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Enhanced Second‐Harmonic Generation in a Single Microwire Based on Localized Surface Plasmon
Author(s) -
Li Jinyu,
Zhu Hai,
Chen Zhiyang,
Huang Ying,
Zheng Huying,
Tang Ziying,
Gui Xuchun,
Wang Shuangpeng,
Tang Zikang,
Ni Peinan,
Genevet Patrice
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900075
Subject(s) - plasmon , materials science , second harmonic generation , drude model , surface plasmon , permittivity , dielectric , optoelectronics , surface second harmonic generation , localized surface plasmon , second harmonic imaging microscopy , nanoparticle , optics , nanotechnology , laser , physics
The properties of enhanced second‐harmonic generation (SHG) in microwires (MWs) through surface plasmonics have been investigated comprehensively. Here, the high Q‐factor hexagonal microcavity of a single MW can significantly confine the fundamental frequency of light. Moreover, randomly distributed Ag nanoparticles are fabricated on a template plate, which is used to enhance the SHG through localized surface plasmon (LSP). Compared with a bare MW, the intensity of the SHG based on LSP can be enhanced twofold at room temperature. It is seen that the LSP effect on SHG is sensitive to temperature, and the enhancement ratio partly increases linearly with decreasing temperature, which can be explained by the dependence of the metal dielectric permittivity on the temperature according to the Drude model.