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Simultaneous effects of electron-hole correlation, hydrostatic pressure, and temperature on the third harmonic generation in parabolic GaAs quantum dots

  • Special Issue: Nanostructured Materials 2010
  • Published:
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Abstract

The combined effects of electron-hole correlation, hydrostatic pressure, and temperature on the third harmonic generation in disk-shaped parabolic GaAs quantum dots are studied under the density matrix formalism and the effective mass approximation. Two well-defined regimes are discussed: (1) the strong-confinement regime, where the Coulomb interaction between the electron and hole is neglected and (2) the weak-confinement regime where the parabolic confinement term is neglected and the system reaches the limit of a hydrogenic problem. The results show that the third harmonic-generation coefficient is strongly dependent on the localization of the electron-hole pair. Also, that by using external perturbations like hydrostatic pressure or by considering the temperature effects it is possible to induce a blue-shift and/or red-shift on the resonant peaks of the third harmonic generation coefficient.

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Acknowledgments

CAD and MEMR wish to thank Mexican CONACYT and Colombian COLCIENCIAS for support under 2008 bilateral Grant "Estudio de propiedades ópticas y electrónicas en nanoestructuras y sistemas semiconductores de baja dimensión". This research was partially supported by Colombian Agencies: CODI-Universidad de Antioquia (Estrategia de Sostenibilidad Grupo de Materia Condensada-UdeA, 2009-2010, 2010-2011), Facultad de Ciencias Exactas y Naturales-Universidad de Antioquia (CAD-exclusive dedication project 2010-2011), and the Excellence Center for Novel Materials/COLCIENCIAS (Contract no. 043-2005). This study was developed with the help of CENAPAD-SP, Brazil.

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Authors and Affiliations

  1. Instituto de Física, Universidad de Antioquia, AA 1226, Medellín, Colombia

    C. M. Duque & C. A. Duque

  2. Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209, Cuernavaca, MOR, México

    M. E. Mora-Ramos

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  1. C. M. Duque
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  2. M. E. Mora-Ramos
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  3. C. A. Duque
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Correspondence to C. M. Duque.

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Duque, C.M., Mora-Ramos, M.E. & Duque, C.A. Simultaneous effects of electron-hole correlation, hydrostatic pressure, and temperature on the third harmonic generation in parabolic GaAs quantum dots. J Nanopart Res 13, 6103–6112 (2011). https://doi.org/10.1007/s11051-011-0348-5

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  • DOI: https://doi.org/10.1007/s11051-011-0348-5

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