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Crowder, J. G.
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article
Suppression of Auger recombination in long-wavelength quantum well W-structure lasers
Abstract
<p>Using picosecond pulses from a free-electron laser, we have carried out a pump-probe determination of Shockley-Read-Hall (SRH) and Auger free-carrier recombination lifetimes in two long-wave (6-7 µm) W-structure laser with InAs/Ga<sub>1</sub>_<sub>x</sub>In<sub>x</sub>Sb/InAs/AlSb active regions. The SRH coefficient is nearly constant (A ? 4.0 × 10<sup>8</sup> s<sup>-1</sup>), while the Auger coefficient has an upper limit of C = 4.0 × 10<sup>-27</sup> to 2.2 × 10<sup>-27</sup> cm<sup>6</sup>/s in the temperature range 40-230 K. This represents an order of magnitude Auger suppression compared to type-I III-V semiconductors with the same energy gap.</p>