Optical coherent transient processes in thin semiconductor quantum wires

Pranay K. Sen

doi:10.1117/12.441284

25 September 2001 Optical coherent transient processes in thin semiconductor quantum wires

Pranay K. Sen

Proceedings Volume 4417, Photonics 2000: International Conference on Fiber Optics and Photonics; (2001) https://doi.org/10.1117/12.441284
Event: Photonics 2000: International Conference on Fiber Optics and Photonics, 2001, Calcutta, India

Abstract

The paper discusses the analytical investigation of the occurrence of coherent optical transient processes such as dynamic Stark effect and free induction decay in direct-gap semiconductor quantum wires with thickness and width smaller than the bulk Wannier-Mott exciton Bohr radius. The role of a moderately strong magnetic field has been critically evaluated in the occurrence of the transient processes. The analysis is based upon the time dependent perturbation treatment of the coherent radiation-semiconductor interaction model under near band gap resonant excitation regime. The excitation intensity is kept below the Mott transition regime. Numerical estimates made for a GaAs/AlGaAs quantum wire irradiated by femtosecond pulse Ti:Sapphire laser establishes that the Stark shift, Stark broadening as well as free induction decay are all considerably influenced by the magnetic field. Moreover, the wire width also affects Stark splittings.

Citation Download Citation

Pranay K. Sen "Optical coherent transient processes in thin semiconductor quantum wires", Proc. SPIE 4417, Photonics 2000: International Conference on Fiber Optics and Photonics, (25 September 2001); https://doi.org/10.1117/12.441284

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