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based quantum cascade lasers
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Diagram of the domains where the absolute value of the lattice mismatch between the superlattices and the InAs substrate is below , the superlattices being defined by an thickness ratio and an AlSb thickness. Dashed lines set the limits of the domains for different amounts of AlAs monolayer added per period (0.5, 1.0, 1.5, and 2.0 ML). The squares indicate the position on the diagram of the superlattices equivalent to various QCL active regions. The corresponding targeted wavelengths are indicated. The filled square sets the position of the active region designed for operation (described in Ref. 18).

Image of FIG. 2.
FIG. 2.

(Color online) High resolution x-ray diffraction experimental rocking curve (a) and simulated rocking curve (b) in the vicinity of the symmetrical (004) InP reflection of the QCL described in this paper. For the sake of clarity, the experimental rocking curve is shifted vertically. Simulation is done using, as input parameters, the intended quantum well and barrier thicknesses, in agreement with the QCL design, with an As composition in the AlAsSb barrier of 0.22.

Image of FIG. 3.
FIG. 3.

(Color online) Voltage and emitted power as a function of the current density at room temperature of a long and wide QCL emitting at . The laser is driven with pulses at a repetition rate of . The inset shows the high resolution emission spectrum at .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: InAs∕AlAsSb based quantum cascade lasers