Effects of external magnetic fields on the confined states and optical properties of conical quantum dot nanowire

Abstract

In this paper, we have investigated theoretically the effect of the external magnetic fields on the electronic structuctures and optical properties of a nanosystem consisting of a conical InAs quantum dot embedded in an infinite GaAs nanowire. To this end the Schrodinger equation have been solved numerically utilizing the effective mass approximation to calculate the confined energy states and binding energies of the system. The findings demonstrate that under the effect of the magnetic fields, the energies of confined states in the Quantum Dot of +|m| and −|m| angular momentum have been separated and increased toward the energy continuum of the nanowire. It has been shown that the lower limit of energy continuum of ±m states are split which results in different binding energy for states of +|m| and −|m| angular momentum. Finally, the oscillator strength for intersubband transitions between the system's confined energy states has been explored in order to discuss the optical properties of the described system.