Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2)
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Interband Cascade Lasers (ICLs) with threshold current densities below 100 A/cm(2) in pulsed operation at room temperature are presented. The laser structure comprises 10 active stages of 41 nm length, each stage containing a W-quantum well active region for emission in the spectral region around 3.6 mu m. A comparison of devices with 6 and 10 stages shows that the latter have a reduced threshold due to an increased optical confinement factor, very competitive threshold power densities of 428 W cm(-2) despite an increased threshold voltage and large differential slope efficiencies of 1390 mW/A. For a narrow ridge device, continuous wave operation is observed up to 65 degrees C.
Weih , R , Kamp , M & Höfling , S 2013 , ' Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2) ' Applied Physics Letters , vol 102 , no. 23 , 231123 . DOI: 10.1063/1.4811133
Applied Physics Letters
Copyright 2013, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at http://scitation.aip.org/content/aip/journal/apl/102/23/10.1063/1.4811133
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