Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
66 (1995), S. 118-120
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Effective band gaps of type-II superlattices (SLs) can cover a wide infrared wavelength range, even beyond the narrowest band gap of any natural antimonide semiconductor alloys. This letter reports the first InAs/InAsxSb1−x type-II SL lasers with cw, optically pumped operation up to 95 K. The stimulated emission results from spatially indirect transitions of relatively extended electron states in the InAs/InAsxSb1−x SL conduction band to the hole states that are localized in the InAsx Sb1−x layers. The lasing wavelength is around 3.3–3.4 μm. Equivalent threshold current densities are estimated to be 3.3 and 56 A/cm2 at sample temperatures of 5 and 95 K, respectively. The characteristic temperature (T0) is approximately 32 K. These results demonstrate that the InAs/InAsxSb1−x type-II SL clad by AlAs0.16Sb0.84 ordered-alloy layers is a promising material system for midwave infrared semiconductor lasers. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.113535
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