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

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...

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Bibliographic Details
Published in:Chinese physics B 2012-10, Vol.21 (10), p.424-428
Main Author: 刘杰涛 许斌宗 张晶 蔡利康 宋国峰
Format: Article
Language:English
Subjects:
Gain
Indentation
InGaAsP
Lasing
Mathematical analysis
Nanostructure
Optimization
Plasmonics
Waveguides
亚波长结构
光电集成电路
增益
应用
等离子体波导
纳米激光器
门槛
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Summary: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.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/10/107303