Single-Band 2‑nm-Line-Width Plasmon Resonance in a Strongly Coupled Au Nanorod

This paper reports a dramatic reduction in plasmon resonance line width of a single Au nanorod by coupling it to a whispering gallery cavity of a silica microfiber. With fiber diameter below 6 μm, strong coupling between the nanorod and the cavity occurs, leading to evident mode splitting and spectr...

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Published in:Nano letters 2015-11, Vol.15 (11), p.7581-7586
Main Authors: Wang, Pan, Wang, Yipei, Yang, Zongyin, Guo, Xin, Lin, Xing, Yu, Xiao-Chong, Xiao, Yun-Feng, Fang, Wei, Zhang, Lei, Lu, Guowei, Gong, Qihuang, Tong, Limin
Format: Article
Language:English
Subjects:
Coupling
Galleries
Gold
Holes
Microfibers
Nanostructure
Plasmons
Whispering gallery modes
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cited_by cdi_FETCH-LOGICAL-a480t-5aadf80af9571bd746958c2591abfde3f8704afa30e2071d4786e368157d42d53
cites cdi_FETCH-LOGICAL-a480t-5aadf80af9571bd746958c2591abfde3f8704afa30e2071d4786e368157d42d53
container_end_page 7586
container_issue 11
container_start_page 7581
container_title Nano letters
container_volume 15
creator Wang, Pan
Wang, Yipei
Yang, Zongyin
Guo, Xin
Lin, Xing
Yu, Xiao-Chong
Xiao, Yun-Feng
Fang, Wei
Zhang, Lei
Lu, Guowei
Gong, Qihuang
Tong, Limin
description This paper reports a dramatic reduction in plasmon resonance line width of a single Au nanorod by coupling it to a whispering gallery cavity of a silica microfiber. With fiber diameter below 6 μm, strong coupling between the nanorod and the cavity occurs, leading to evident mode splitting and spectral narrowing. Using a 1.46-μm-diameter microfiber, we obtained single-band 2-nm-line-width plasmon resonance in an Au nanorod around a 655-nm-wavelength, with a quality factor up to 330 and extinction ratio of 30 dB. Compared to an uncoupled Au nanorod, the strongly coupled nanorod offers a 30-fold enhancement in the peak intensity of plasmonic resonant scattering.
doi_str_mv 10.1021/acs.nanolett.5b03330
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Coupling
Galleries
Gold
Holes
Microfibers
Nanostructure
Plasmons
Whispering gallery modes
title Single-Band 2‑nm-Line-Width Plasmon Resonance in a Strongly Coupled Au Nanorod
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