Electron-related optical responses in triangular quantum dots

Tiutiunnyk, A.; Tulupenko, Y.; Mora-Ramos, M. E.; Kasapoglu, E.; Ungan, F.; Sari, H.; Sokmen, I.; Duque, C. A.

Abstract

The linear and nonlinear coefficients for the optical absorption and relative refractive index change associated with intersubband transitions of electrons in the conduction band of a two-dimensional quantum dot of triangular shape are calculated for x-polarization and y-polarization of the incident light. Both the effective mass and parabolic band approximations have been considered. The results show that the increase in the size of the triangular quantum dot leads to the expected fall of the intersubband energy transition and that there is an increment in the values of the associated off-diagonal electric dipole moment matrix elements. All this reflects in the increase of the amplitude of the nonlinear optical absorption resonant peak, as well as in the growth of the total relative refractive index in the system. (C) 2014 Elsevier B.V. All rights reserved.

Más información

Título según WOS: ID WOS:000337653100021 Not found in local WOS DB
Título de la Revista: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volumen: 60
Editorial: ELSEVIER SCIENCE BV
Fecha de publicación: 2014
Página de inicio: 127
Página final: 132
DOI:

10.1016/j.physe.2014.02.017

Notas: ISI