Suppression of intervalley scattering in Ga(As)Sb quantum wells

K. C. Hall, S. W. Leonard, H. M. Van Driel, A. R. Kost, E. Selvig

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Femtosecond time-resolved reflectivity was measured near the 1.55 μm absorption edge of several GaAsxSb1-x/AlSb quantum well samples. On the basis of differences in the reflectivity recovery kinetics and plateau values, we deduce that Γ-L intervalley scattering can be effectively suppressed for x≥0.19. This is consistent with calculations incorporating confinement and strain effects which give L-Γ energy separations of 29 (x = 0) and 109 meV (x = 0.19). Suppression of intervalley scattering can lead to increased internal quantum efficiency and higher carrier mobility in 1.55 μm based devices.

Original languageEnglish (US)
Pages (from-to)2882-2884
Number of pages3
JournalApplied Physics Letters
Issue number18
StatePublished - Oct 30 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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