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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/25801

Title: Three Wave Mixing in Periodically Quantum-well-intermixed GaAs:AlGaAs Superlattices: Modeling, Optimization, and Parametric Generation
Authors: Sigal, Iliya
Advisor: Helmy, Amr S.
Aitchison, J. Stewart
Department: Electrical and Computer Engineering
Keywords: optics
second harmonic generation
quantum well intermixing
Issue Date: 11-Jan-2011
Abstract: The three wave mixing process was modeled in GaAs:AlGaAs superlattices using two new modeling tools that were developed in the course of this work: A 2D beam propagation tool for optimizing quasi-phase matching gratings, and a 1D iterative beam propagation tool for determining the output powers and threshold of optical parametric oscillators of arbitrary geometries. The 2D tool predicts close to 80% enhancement of conversion e ciency by phase matching near 800 nm compared to 775 nm, which was the originally designed operation wavelength. The model also predicts resonant behaviour for an abrupt grating pro le. The 1D tool was used to determine the threshold conditions for para- metric oscillation for di erent geometries. The performances of di erent phase matching approaches in AlGaAs were quantitatively compared. The model also indicated the need for pulsed operation to achieve reasonably low threshold powers in AlGaAs waveguides.
URI: http://hdl.handle.net/1807/25801
Appears in Collections:Master

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