Room-temperature continuous-wave quantum cascade lasers grown by MOCVD without lateral regrowth |
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Authors: | Zhijun Liu D Wasserman SS Howard AJ Hoffman CF Gmachl Xiaojun Wang T Tanbun-Ek Liwei Cheng Fow-Sen Choa |
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Affiliation: | Dept. of Electr. Eng., Princeton Univ., NJ, USA; |
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Abstract: | We report on room-temperature continuous-wave (CW) operation of /spl lambda//spl sim/8.2 /spl mu/m quantum cascade lasers grown by metal-organic chemical vapor deposition without lateral regrowth. The lasers have been processed as double-channel ridge waveguides with thick electroplated gold. CW output power of 5.3 mW is measured at 300 K with a threshold current density of 2.63 kA/cm/sup 2/. The measured gain at room temperature is close to the theoretical design, which enables the lasers to overcome the relatively high waveguide loss. |
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