Suppression of Auger recombination in long-wavelength quantum well W-structure lasers

P. C. Findlay, I. V. Bradley, J. G. Crowder, C. R. Pidgeon, B. N. Murdin, M. J. Yang, I. Vurgaftman, J. R. Meyer

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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/Ga1_xInxSb/InAs/AlSb active regions. The SRH coefficient is nearly constant (A ? 4.0 × 108 s-1), while the Auger coefficient has an upper limit of C = 4.0 × 10-27 to 2.2 × 10-27 cm6/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.

Original languageEnglish
Pages (from-to)10297-10300
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number15
Publication statusPublished - 15 Oct 2000


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