单模太赫兹量子级联激光器  

Single-mode terahertz quantum cascade laser

作　　者：刘俊岐[1] 王涛[1] 刘峰奇[1] 

机构地区：[1]中国科学院半导体研究所半导体材料科学重点实验室,北京100083

出　　处：《太赫兹科学与电子信息学报》2015年第2期195-197,共3页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB339803);国家重大科学仪器设备开发专项资助项目(2011YQ13001802-04;中国工程物理研究院太赫兹科学技术基金资助项目(CAEPTHZ201303)

摘　　要：为了获得窄线宽太赫兹光源,制作了基于表面金属光栅的单模太赫兹量子级联激光器。通过优化光栅结构,获得了具有较强耦合效率和较低损耗的光栅结构参数。波导结构采用半绝缘表面等离子体波导以便能获得较高的光输出功率。激光器单模激射波长为95μm。10 K时,器件最高单模输出功率达到了43 m W,单模抑制比为18 d B。单模器件工作温度超过70 K,在70 K时,仍然有5 m W的单模输出功率。这种输出性能良好的激光器有望作为太赫兹接收机的本振源。A single-mode terahertz quantum cascade laser with metallic surface gratings is fabricated in order to obtain a terahertz source with narrow line width. Strong coupling efficiency and low waveguide loss are realized. A semi-insulating surface-plasmon waveguide is used to present a high output power. The lasing wavelength of this laser is 95 μm. The highest optical power of 43 mW and Side-Mode Suppression Ratio(SMSR) of 18 dB can be obtained under 10 K. Under the highest operation temperature of 70 K, an output power of 5 mW is still achieved. This kind of laser is the most promising solid-state source as the Local Oscillator(LO) for a high resolution terahertz heterodyne receiver.

关 键 词：太赫兹 量子级联激光器 单模 本振源 

分 类 号：TN248[电子电信—物理电子学]