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Issue 10, 2020
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Selectively enhanced Raman/fluorescence spectra in photonic–plasmonic hybrid structures

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Abstract

The manipulation of the interaction between molecules and photonic–plasmonic hybrid structures is critical for the application of surface-enhanced spectroscopy (SES). Herein, we report a study on the mode coupling mechanism and SES performance in a typical optoplasmonic system constructed with a polystyrene microsphere (PS MS) resonator and gold nanoparticles (Au NPs). The mode coupling mechanism was found to be closely dependent on the relative positions of PS MS, Au NPs, and molecules in the optoplasmonic system, based on which selectively enhanced Raman and fluorescence signals of molecules can be realized via the collaboration of enhancement and quenching channels of the PS MS and Au NPs. We demonstrate two arrangements of the photonic–plasmonic hybrid structure, which can support fluorescence signals with sharp whispering-gallery modes and apparently enhanced Raman signals with relatively low detection limits and good robustness, respectively.

Graphical abstract: Selectively enhanced Raman/fluorescence spectra in photonic–plasmonic hybrid structures

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Supplementary files

Article information


Submitted
31 Jul 2020
Accepted
12 Sep 2020
First published
15 Sep 2020

This article is Open Access

Nanoscale Adv., 2020,2, 4682-4688
Article type
Paper

Selectively enhanced Raman/fluorescence spectra in photonic–plasmonic hybrid structures

J. Qian, Z. Zhu, J. Yuan, Y. Liu, B. Liu, X. Zhao and L. Jiang, Nanoscale Adv., 2020, 2, 4682
DOI: 10.1039/D0NA00625D

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