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

2000; American Physical Society; Volume: 62; Issue: 15 Linguagem: Inglês

10.1103/physrevb.62.10297

1095-3795

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

Electronic and Structural Properties of Oxides

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 \ensuremath{\mu}m) W-structure laser with ${\mathrm{I}\mathrm{n}\mathrm{A}\mathrm{s}/\mathrm{G}\mathrm{a}}_{1\ensuremath{-}x}{\mathrm{In}}_{x}\mathrm{S}\mathrm{b}/\mathrm{I}\mathrm{n}\mathrm{A}\mathrm{s}/\mathrm{A}\mathrm{l}\mathrm{S}\mathrm{b}$ active regions. The SRH coefficient is nearly constant $(A\ensuremath{\approx}4.0\ifmmode\times\else\texttimes\fi{}{10}^{8}{\mathrm{s}}^{\mathrm{\ensuremath{-}}1}),$ while the Auger coefficient has an upper limit of $C=4.0\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}27}$ to $2.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}27}{\mathrm{cm}}^{6}/\mathrm{s}$ 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.