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An eigenvalue method to study the threshold behaviors of plasmonic nano-lasers
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Update time: 2014-03-27
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Linlong Tang• Haofei Shi• Hongtao Gao• Jinglei Du• Zhiyou Zhang• Xiaochun Dong• Chunlei Du

L. Tang H. Shi  X. Dong C. Du Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, People’s Republic of China e-mail: shi@cigit.ac.cn C. Du e-mail: cldu@cigit.ac.cn

L. Tang J. Du Z. Zhang Physics Department, Sichuan University, Chengdu 610064, People’s Republic of China

H. Gao Institute of Optics and Electronics, Chinese Academy of Sciences, P. O. Box 350, Chengdu 610209, People’s Republic of China

Abstract

An eigenvalue method is proposed to study the threshold behaviors of plasmonic nano-lasers. The medium gain and dispersion are taken into consideration based on semi-classical laser dynamics, and therefore the lasing threshold, mode pattern, and lasing frequency can be theoretically predicted. The lasing properties of dielectric, plasmonic core, and plasmonic shell nano-lasers are investigated in details. It is found that the lasing thresholds of nano-lasers can be reduced by two orders of magnitude when introducing localized surface plasmon modes.

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