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Low-threshold 7.3 μm quantum cascade lasers grown by gas-source molecular beam epitaxy (1999)

Slivken, S. ; Matlis, A. ; Rybaltowski, A. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 74 (1999), S. 2758-2760

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We report low-threshold 7.3 μm superlattice-based quantum cascade lasers. The threshold current density is 3.4 kA/cm2 at 300 K and 1.25 kA/cm2 at 79 K in pulsed mode for narrow (∼20 μm), 2-mm-long laser diodes. The characteristic temperature (T0) is 210 K. The slope efficiencies are 153 and 650 mW/A at 300 and 100 K, respectively. Power output is in excess of 100 mW at 300 K. Laser far-field intensity measurements give divergence angles of 64° and 29° in the growth direction and in the plane of the quantum wells, respectively. Far-field simulations show excellent agreement with the measured results. © 1999 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.124005

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