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Saturation and self-lensing in self-assembled quantum dots with constant-wave driving

Tierno, A. and Ackemann, T. and Maggipinto, T. and Brambilla, M.G. (2009) Saturation and self-lensing in self-assembled quantum dots with constant-wave driving. Physical Review B, 80 (3). ISSN 1098-0121

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Abstract

The nonlinear optical response of self-assembled quantum dots to cw driving is analyzed via numerical simulations of a spatially resolved rate equation model. The saturation is shown to follow a behavior in between the one for a dominantly, homogeneously, and inhomogeneously broadened medium. Self-lensing is suggested to probe the refractive-index nonlinearities and to open a complementary way of characterizing phase-amplitude coupling (alpha factor) in quantum-dots samples. For conservative assumptions on current samples the minimum focal length is predicted to be +/-1.7 mm for an input beam with 15 mu m radius at a detuning of 1.1 inhomogeneous linewidths from gain center.

Item type: Article
ID code: 19028
Keywords: linewidth enhancement factor, semiconductor optical amplifiers, differential efficiency, feedback solitons, gain saturation, cavity solitons, lasers, beam, filamentation, pattern, Physics, Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 25 May 2010 11:49
    Last modified: 28 Mar 2014 05:20
    URI: http://strathprints.strath.ac.uk/id/eprint/19028

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