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Enhanced Raman scattering based on fabry‐perot like resonance in a metal‐cladding waveguide
Author(s) -
Yin Cheng,
Lu Yan,
Xu Tian,
Wei Dan Z.,
Jin Yong L.,
Fang Jing H.,
Wang Chao N.,
Huang Mei Z.
Publication year - 2016
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4850
Subject(s) - cladding (metalworking) , raman scattering , raman spectroscopy , resonance (particle physics) , fabry–pérot interferometer , materials science , excitation , excited state , optics , surface plasmon resonance , waveguide , optoelectronics , nanoparticle , nanotechnology , atomic physics , physics , composite material , wavelength , quantum mechanics
A liquid‐core metal‐cladding waveguide structure of millimeter scale is designed to enhance Raman signal via the excitation of Fabry–Perot‐like resonance. Theoretically, an oscillating field distribution covering the whole guiding layer is generated by the multireflection at the two metal interfaces. The large detection area covers the whole sample chamber because of the oscillating nature of excited high order modes with concentrated intensity. By adding metal nanoparticles, the Fabry–Perot‐like resonance can be combined with local surface plasmons resonance to further enhance the light‐matter interaction with the target molecules, which is also confirmed by the experimental results. Copyright © 2015 John Wiley & Sons, Ltd.