Chin. Phys. Lett.  2007, Vol. 24 Issue (6): 1577-1579    DOI:
Original Articles |
Low-Threshold High-Temperature Operation of ~7.4μm Quantum Cascade Lasers
LI Lu;LIU Feng-Qi;SHAO Ye;LIU Jun-Qi;WANG Zhan-Guo
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083
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LI Lu, LIU Feng-Qi, SHAO Ye et al  2007 Chin. Phys. Lett. 24 1577-1579
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Abstract We report low-threshold high-temperature operation of 7.4μm strain-compensated InGaAs/InAlAs quantum cascade lasers (QCLs). For an
uncoated 22-μm-wide and 2-mm-long laser, the low-threshold current
densities, i.e. 0.33kA/cm2 at 81K in pulsed mode and 0.64kA/cm2 at 84K in cw mode, are realized. High-temperature operation of uncoated devices, with a high value of 223K, is achieved in cw mode.
Keywords: 42.55.Px      71.55.Eq      85.60.Bt     
Received: 15 February 2007      Published: 17 May 2007
PACS:  42.55.Px (Semiconductor lasers; laser diodes)  
  71.55.Eq (III-V semiconductors)  
  85.60.Bt (Optoelectronic device characterization, design, and modeling)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I6/01577
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LI Lu
LIU Feng-Qi
SHAO Ye
LIU Jun-Qi
WANG Zhan-Guo
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