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A high-quality factor hybrid plasmonic nanocavity based on distributed Bragg reflectors |
| Linlin Tu(屠林林)1, Chi Zhang(张弛)1, Zhong Huang(黄忠)1, Jason Yau1,3, Peng Zhan(詹鹏)1,2, Zhenlin Wang(王振林)1,2 |
1. School of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;
2. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China;
3. School of Physics, University of Western Australia, Perth WA 6009, Australia |
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Abstract Herein, we propose a high-quality (Q) factor hybrid plasmonic nanocavity based on distributed Bragg reflectors (DBRs) with low propagation loss and extremely strong mode confinement. This hybrid plasmonic nanocavity is composed of a high-index cylindrical nanowire separated from a metal surface possessing shallow DBRs gratings by a sufficiently thin low-index dielectric layer. The hybrid plasmonic nanocavity possesses advantages such as a high Purcell factor (Fp) of up to nearly 20000 and a gain threshold approaching 266 cm-1 at 1550 nm, promising a greater potential in deep sub-wavelength lasing applications.
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Received: 25 March 2016
Revised: 28 April 2016
Accepted manuscript online:
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PACS:
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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81.07.Bc
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(Nanocrystalline materials)
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81.07.Gf
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(Nanowires)
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| Fund: Project supported by the National Key Basic Research Special Foundation of China (Grant Nos. 2012CB921501 and 2013CB632703) and the National Natural Science Foundation of China (Grant Nos. 11274160, 91221206, and 51271092). |
Corresponding Authors:
Peng Zhan, Zhenlin Wang
E-mail: zhanpeng@nju.edu.cn;zlwang@nju.edu.cn
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Cite this article:
Linlin Tu(屠林林), Chi Zhang(张弛), Zhong Huang(黄忠), Jason Yau, Peng Zhan(詹鹏), Zhenlin Wang(王振林) A high-quality factor hybrid plasmonic nanocavity based on distributed Bragg reflectors 2016 Chin. Phys. B 25 097302
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