Low Threshold Current Density Operation of Strain-Compensated Quantum Cascade Laser

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摘要 We report the low threshold current density operation of strain-compensated
In _0.64 Ga _0.36 As/In _0.38 Al _0.62 As quantum cascade lasers emitting near 4.94μm. By employing an enlarged strain-compensated structure and optimizing the injector doping density, a rather low threshold current density of 0.57kA/cm² at 80K is achieved for an uncoated 20-μm-wide and 2.5-mm-long laser.

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	SHAO Ye
	LI Lu
	LIU Jun-Qi
	LIU Feng-Qi
	WANG Zhan-Guo

Abstract：We report the low threshold current density operation of strain-compensated
In _0.64 Ga _0.36 As/In _0.38 Al _0.62 As quantum cascade lasers emitting near 4.94μm. By employing an enlarged strain-compensated structure and optimizing the injector doping density, a rather low threshold current density of 0.57kA/cm² at 80K is achieved for an uncoated 20-μm-wide and 2.5-mm-long laser.

Key words： 42.55.Px 85.60.Bt 71.55.Eq 81.15.Hi

收稿日期: 2006-11-01 出版日期: 2007-02-08

:	42.55.Px	(Semiconductor lasers; laser diodes)
	85.60.Bt	(Optoelectronic device characterization, design, and modeling)
	71.55.Eq	(III-V semiconductors)
	81.15.Hi	(Molecular, atomic, ion, and chemical beam epitaxy)

引用本文:

SHAO Ye;LI Lu;LIU Jun-Qi;LIU Feng-Qi;WANG Zhan-Guo. Low Threshold Current Density Operation of Strain-Compensated Quantum Cascade Laser[J]. 中国物理快报, 2007, 24(3): 717-720.
SHAO Ye, LI Lu, LIU Jun-Qi, LIU Feng-Qi, WANG Zhan-Guo. Low Threshold Current Density Operation of Strain-Compensated Quantum Cascade Laser. Chin. Phys. Lett., 2007, 24(3): 717-720.

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https://cpl.iphy.ac.cn/CN/ 或 https://cpl.iphy.ac.cn/CN/Y2007/V24/I3/717

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