PhD defense - Miguel Urbaneja Torres

Electronic and optical properties of semiconductor nanowires with prismatic geometry

  • 25.2.2020, 13:00 - 14:00

The PhD defense of Miguel Urbaneja Torres will be held on Tuesday the 25th of February at 13:00 in room M104.

Title of thesis: Electronic and optical properties of semiconductor nanowires with prismatic geometry

Candidate: Miguel Urbaneja Torres

Date and time: 25th of February 2020 at 13:00

Room: M104

Thesis Committee:

Andrei Manolescu (supervisor, Reykjavik University),
Sigurður I. Erlingsson (Reykjavik University),
Viðar Guðmundsson (University of Iceland)

Examiner:

Guido Goldoni, University of Modena and Reggio Emilia, Italy

Abstract:

In this work, fundamental electronic and optical properties of semiconductor prismatic nanowires, which are a direct consequence of their geometry, are numerically studied. The quantum states of electrons confined in polygonal shells, which describe the cross-section of nanowires where a conducting shell surrounds an insulating core, are obtained using a finite-elements method based on a polar grid, which allows to model a wide range of different shapes. Directly related with the quantum states of the nanowires, the charge and current distributions, conductance and excitonic states are obtained using several computational models. The light scattering by prismatic nanowires is also studied by solving Maxwell’s equations with the finite elements method built in the software COMSOL Multiphysics. The results presented here demonstrate that the specific geometry of such nanowires is a source of rich and interesting phenomenology.



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