Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4769038
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We demonstrate quantum cascade lasers emitting at wavelengths of 3-3.2 mu m in the InP-based material system. The laser core consists of GaInAs/AlInAs using strain balancing technique. In room temperature pulsed mode operation, threshold current densities of 1.66 kA/cm(2) and 1.97 kA/cm(2), and characteristic temperatures (T-0) of 108K and 102 K, are obtained for the devices emitting at 3.2 mu m and 3 mu m, respectively. Room temperature continuous wave operation is achieved at both wavelengths. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769038]
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