Ultrastrong Mode Confinement in ZnO Surface Plasmon Nanolasers

Nanolasers with an ultracompact footprint can provide high-intensity coherent light, which can be potentially applied to high-capacity signal processing, biosensing, and subwavelength imaging. Among various nanolasers, those with cavities surrounded by metals have been shown to have superior light e...

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Bibliographic Details
Published in:ACS nano 2015-04, Vol.9 (4), p.3978-3983
Main Authors: Chou, Yu-Hsun, Chou, Bo-Tsun, Chiang, Chih-Kai, Lai, Ying-Yu, Yang, Chun-Ting, Li, Heng, Lin, Tzy-Rong, Lin, Chien-Chung, Kuo, Hao-Chung, Wang, Shing-Chung, Lu, Tien-Chang
Format: Article
Language:English
Subjects:
Coherent light
Confinement
Holes
Lasers
Light emission
Nanostructure
Nanotechnology - methods
Plasmons
Silver
Temperature
Zinc Oxide
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Summary:Nanolasers with an ultracompact footprint can provide high-intensity coherent light, which can be potentially applied to high-capacity signal processing, biosensing, and subwavelength imaging. Among various nanolasers, those with cavities surrounded by metals have been shown to have superior light emission properties because of the surface plasmon effect that provides enhanced field confinement capability and enables exotic light–matter interaction. In this study, we demonstrated a robust ultraviolet ZnO nanolaser that can operate at room temperature by using silver to dramatically shrink the mode volume. The nanolaser shows several distinct features including an extremely small mode volume, a large Purcell factor, and a slow group velocity, which ensures strong interaction with the exciton in the nanowire.
ISSN:1936-0851
1936-086X
DOI:10.1021/acsnano.5b01643