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Chin. Phys. B, 2016, Vol. 25(8): 084206    DOI: 10.1088/1674-1056/25/8/084206
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

High power-efficiency terahertz quantum cascade laser

Yuan-Yuan Li(李媛媛), Jun-Qi Liu(刘俊岐), Feng-Qi Liu(刘峰奇), Jin-Chuan Zhang(张锦川), Shen-Qiang Zhai(翟慎强), Ning Zhuo(卓宁), Li-Jun Wang(王利军), Shu-Man Liu(刘舒曼), Zhan-Guo Wang(王占国)
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China
Abstract  We demonstrate continuous-wave (CW) high power-efficiency terahertz quantum cascade laser based on semi-insulating surface-plasmon waveguide with epitaxial-side down (Epi-down) mounting process. The performance of the device is analyzed in detail. The laser emits at a frequency of ~3.27 THz and has a maximum CW operating temperature of ~70 K. The peak output powers are 177 mW in pulsed mode and 149 mW in CW mode at 10 K for 130-μm-wide Epi-down mounted lasers. The record wall-plug efficiencies in direct measurement are 2.26% and 2.05% in pulsed and CW mode, respectively.
Keywords:  terahertz lasers      quantum cascade lasers      epitaxial-side down mounting  
Received:  24 February 2016      Revised:  12 April 2016      Accepted manuscript online: 
PACS:  42.55.Px (Semiconductor lasers; laser diodes)  
  73.63.Hs (Quantum wells)  
  85.35.Be (Quantum well devices (quantum dots, quantum wires, etc.))  
Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2014CB339803 and 2013CB632801), the Special-funded Program on National Key Scientific Instruments and Equipment Development, China (Grant No. 2011YQ13001802-04), and the National Natural Science Foundation of China (Grant No. 61376051).
Corresponding Authors:  Jun-Qi Liu, Feng-Qi Liu     E-mail:  jqliu@semi.ac.cn;fqliu@red.semi.ac.cn

Cite this article: 

Yuan-Yuan Li(李媛媛), Jun-Qi Liu(刘俊岐), Feng-Qi Liu(刘峰奇), Jin-Chuan Zhang(张锦川), Shen-Qiang Zhai(翟慎强), Ning Zhuo(卓宁), Li-Jun Wang(王利军), Shu-Man Liu(刘舒曼), Zhan-Guo Wang(王占国) High power-efficiency terahertz quantum cascade laser 2016 Chin. Phys. B 25 084206

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