Ultrahigh Purcell factor in low-threshold nanolaser based on asymmetric hybrid plasmonic cavity

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Date
2016-09-12
Authors
Wei, Wei
Yan, Xin
Zhang, Xia
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Publisher
Nature Publishing Group
Published Version
10.1038/srep33063
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Abstract
A low-threshold nanolaser with all three dimensions at the subwavelength scale is proposed and investigated. The nanolaser is constructed based on an asymmetric hybrid plasmonic F-P cavity with Ag-coated end facets. Lasing characteristics are calculated using finite element method at the wavelength of 1550 nm. The results show that owing to the low modal loss, large modal confinement factor of the asymmetric plasmonic cavity structure, in conjunction with the high reflectivity of the Ag reflectors, a minimum threshold gain of 240 cm−1 is predicted. Furthermore, the Purcell factor as large as 2518 is obtained with optimized structure parameters to enhance rates of spontaneous and stimulated emission.
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Keywords
Nanolaser , Asymmetric hybrid plasmonic cavity , Purcell factor
Citation
WEI, W., YAN, X. and ZHANG, X. (2016), 'Ultrahigh Purcell factor in low-threshold nanolaser based on asymmetric hybrid plasmonic cavity', Scientific Reports, 6, 33063 (7pp). doi: 10.1038/srep33063
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https://hdl.handle.net/10468/3172
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Physics - Journal Articles
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© 2016, the Authors. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/