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Emission wavelength tuning of interband cascade lasers in the spectral range
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View: Figures


Image of FIG. 1.
FIG. 1.

Bandstructure of one active region cascade (i.e., injector plus W-QW) of the investigated ICL devices for an electric field of 85 kV/cm. Layer thicknesses are similar to the one published in Ref. 16, but with the barriers replaced by binary AlSb. The optical transitions in the W-QWs are schematically indicated via two arrows.

Image of FIG. 2.
FIG. 2.

Emission spectra of six ICL BA devices with QW1 thicknesses ranging from 1.85 to taken in pulsed operation at a heat sink temperature of 77 K covering a spectral range from 2.97 to . The lasers’ respective QW1 thicknesses are marked with squares, yielding a linear tuning rate of wavelength shift per monolayer of InAs.

Image of FIG. 3.
FIG. 3.

Peak emission wavelengths of PL samples (triangles) and ICL devices (squares) at 77 K vs QW1 thickness together with theoretical eight band kp calculations (solid line).

Image of FIG. 4.
FIG. 4.

Temperature dependent measurements of a shallow etched ICL BA device resulting in a slope of 1.88 nm/K from 150 K to RT.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Emission wavelength tuning of interband cascade lasers in the 3–4 μm spectral range