The Interplay of Intraband and Interband Polarization in the Ultrafast Response of Biased Semiconductor Superlattices

• Authors: M. Dignam , M. Hawton , L. Yang , B. Rosam
• Languages of publication: EN

Abstracts

EN

We present the results of a new excitonic formalism for the treatment of ultrafast dynamics in asymmetric semiconductor multiple quantum well structures. The method is infinite order in the optical field, with truncation of the infinite hierarchy of dynamical equations being accomplished via a factorization of six-particle correlation functions into a product of two- and four-particle ones. We use this formalism to calculate the THz emission and degenerate four-wave mixing signals from biased semiconductor superlattices under different excitation conditions. We present a number of density-dependent effects that demonstrate the central role that the intraband polarization plays in determining and modifying the nonlinear ultrafast response of the system.

Keywords

EN

78.47.+p; 42.65.Re; 78.67.-n

Discipline

• 42.65.Re: Ultrafast processes; optical pulse generation and pulse compression(for ultrafast spectroscopy, see 78.47.J-; for ultrafast magnetization dynamics, see 75.78.Jp)
• 78.67.-n: Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures(for magnetic properties of nanostructures, see 75.75.-c; for electronic transport in nanoscale structures, see 73.63.-b; for mechanical properties of nanoscale systems, see 62.25.-g)

• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 1
• Pages: 56-64

Dates

published

2005-01

received

2004-08-22

Contributors

author

M. Dignam

• Department of Physics, Queen's University, Kingston, ON, K7L 3N5, Canada

author

M. Hawton

• Department of Physics, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada

author

L. Yang

• Department of Physics, Queen's University, Kingston, ON, K7L 3N5, Canada

author

B. Rosam

• Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden, Germany

References

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Identifiers

DOI

10.12693/APhysPolA.107.56