中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77303-077303.doi: 10.1088/1674-1056/24/7/077303

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

A low-threshold nanolaser based on hybrid plasmonic waveguides at the deep subwavelength scale

李志全, 朴瑞琦, 赵晶晶, 孟晓云, 童凯   

  1. Institute of Electrical Engineering, Yanshan University, Qinghuangdao 066004, China
  • 收稿日期:2014-10-18 修回日期:2015-02-07 出版日期:2015-07-05 发布日期:2015-07-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61172044) and the Natural Science Foundation of Hebei Province, China (Grant No. F2014501150).

A low-threshold nanolaser based on hybrid plasmonic waveguides at the deep subwavelength scale

Li Zhi-Quan (李志全), Piao Rui-Qi (朴瑞琦), Zhao Jing-Jing (赵晶晶), Meng Xiao-Yun (孟晓云), Tong Kai (童凯)   

  1. Institute of Electrical Engineering, Yanshan University, Qinghuangdao 066004, China
  • Received:2014-10-18 Revised:2015-02-07 Online:2015-07-05 Published:2015-07-05
  • Contact: Li Zhi-Quan E-mail:lzq54@ysu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61172044) and the Natural Science Foundation of Hebei Province, China (Grant No. F2014501150).

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摘要： A novel nanolaser structure based on a hybrid plasmonic waveguide is proposed and investigated. The coupling between the metal nanowire and the high-index semiconductor nanowire with optical gain leads to a strong field enhancement in the air gap region and low propagation loss, which enables the realization of lasing at the deep subwavelength scale. By optimizing the geometric parameters of the structure, a minimal lasing threshold is achieved while maintaining the capacity of ultra-deep subwavelength mode confinement. Compared with the previous coupled nanowire pair based hybrid plasmonic structure, a lower threshold can be obtained with the same geometric parameters. The proposed nanolaser can be integrated into a miniature chip as a nanoscale light source and has the potential to be widely used in optical communication and optical sensing technology.

关键词: surface plasmon, hybrid plasmonic waveguides, nanolasers

Abstract: A novel nanolaser structure based on a hybrid plasmonic waveguide is proposed and investigated. The coupling between the metal nanowire and the high-index semiconductor nanowire with optical gain leads to a strong field enhancement in the air gap region and low propagation loss, which enables the realization of lasing at the deep subwavelength scale. By optimizing the geometric parameters of the structure, a minimal lasing threshold is achieved while maintaining the capacity of ultra-deep subwavelength mode confinement. Compared with the previous coupled nanowire pair based hybrid plasmonic structure, a lower threshold can be obtained with the same geometric parameters. The proposed nanolaser can be integrated into a miniature chip as a nanoscale light source and has the potential to be widely used in optical communication and optical sensing technology.

Key words: surface plasmon, hybrid plasmonic waveguides, nanolasers

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

  • 73.20.Mf
52.40.Hf (Plasma-material interactions; boundary layer effects) 73.40.Qv (Metal-insulator-semiconductor structures (including semiconductor-to-insulator))