Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications

doi:10.1088/1674-1056/21/10/107303

中国物理B ›› 2012, Vol. 21 ›› Issue (10): 107303-107303.doi: 10.1088/1674-1056/21/10/107303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications

刘杰涛, 许斌宗, 张晶, 蔡利康, 宋国峰

Nano-optoelectronics Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

收稿日期:2012-02-23 修回日期:2012-04-22 出版日期:2012-09-01 发布日期:2012-09-01
基金资助:
Project supported by the National Basic Research Program of China (973 Program) (Grant No. 2011CBA00608) and the National Natural Science Foundation of China (Grant Nos. 61036010, 60906027 60906028, and 61036010).

Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications

Liu Jie-Tao (刘杰涛), Xu Bin-Zong (许斌宗), Zhang Jing (张晶), Cai Li-Kang (蔡利康), Song Guo-Feng (宋国峰)

Nano-optoelectronics Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

Received:2012-02-23 Revised:2012-04-22 Online:2012-09-01 Published:2012-09-01
Contact: Song Guo-Feng E-mail:sgf@semi.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (973 Program) (Grant No. 2011CBA00608) and the National Natural Science Foundation of China (Grant Nos. 61036010, 60906027 60906028, and 61036010).

摘要/Abstract

摘要： A subwavelength plasmonic indented waveguide with an active InGaAsP core is proposed. The characteristics of the gap plasmon mode and gain required for lossless propagation are investigated and analyzed by the finite element method. We numerically calculate the normalized mode areas and percentages of energy confined in InGaAsP and metal for plasmonic nanolaser applications. It is shown that the indentation of the sidewalls has an optimal value for which the lasing threshold gain is minimal. The structure could enable low-threshold subwavelength lasing and applications for optoelectronic integrated circuits.

关键词: optical waveguide, nanolasers, surface plasmon, gain

Abstract: A subwavelength plasmonic indented waveguide with an active InGaAsP core is proposed. The characteristics of the gap plasmon mode and gain required for lossless propagation are investigated and analyzed by the finite element method. We numerically calculate the normalized mode areas and percentages of energy confined in InGaAsP and metal for plasmonic nanolaser applications. It is shown that the indentation of the sidewalls has an optimal value for which the lasing threshold gain is minimal. The structure could enable low-threshold subwavelength lasing and applications for optoelectronic integrated circuits.

Key words: optical waveguide, nanolasers, surface plasmon, gain

中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

73.20.Mf

73.40.Sx (Metal-semiconductor-metal structures)

刘杰涛, 许斌宗, 张晶, 蔡利康, 宋国峰. Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications[J]. 中国物理B, 2012, 21(10): 107303-107303.

Liu Jie-Tao (刘杰涛), Xu Bin-Zong (许斌宗), Zhang Jing (张晶), Cai Li-Kang (蔡利康), Song Guo-Feng (宋国峰). Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications[J]. Chin. Phys. B, 2012, 21(10): 107303-107303.

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Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications

Gain-assisted indented plasmonic waveguide for low-threshold nanolaser applications

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