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

作　　者：李志全 朴瑞琦 赵晶晶 孟晓云 童凯 

机构地区：[1]Institute of Electrical Engineering,Yanshan University

出　　处：《Chinese Physics B》2015年第7期441-447,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61172044);the Natural Science Foundation of Hebei Province,China(Grant No.F2014501150)

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.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 

分 类 号：TN248[电子电信—物理电子学] TN814