Phys. Rev. B 65, 245325 (2002) [10 pages]Effects of intervalence band coherences on the coherently coupled heavy-hole–light-hole Stark shift in semiconductor quantum wellsReceived 25 February 2002; published 24 June 2002 A theoretical study of the coherently coupled heavy-hole–light-hole optical Stark effect in semiconductor quantum wells is presented. Based on a detailed investigation of the various many-body contributions to the Stark shifts, we identify a parameter regime in which the existence of intervalence band coherences (analogous to the nonradiative Raman coherence in three-level atoms) can be inferred from the coherently coupled heavy-hole–light-hole excitonic optical Stark shift. The analysis is performed for the third-order nonlinear optical regime (χ3 regime), and is based on the dynamics-controlled truncation (DCT) formalism. It includes the relevant optical selection rules, excitonic and two-exciton-correlation (e.g., biexcitonic) effects. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.245325
DOI:
10.1103/PhysRevB.65.245325
PACS:
78.47.+p, 42.50.Md, 73.21.Fg, 78.67.De
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