AC-Stark effect in a semi-spherical quantum dot

TL;DR

This paper develops a theoretical model using Floquet formalism to analyze the AC-Stark effect in semi-spherical quantum dots, providing analytical solutions for electronic states under varying electric field conditions.

Contribution

It introduces a novel application of Floquet theory to semi-spherical quantum dots, deriving explicit analytical expressions for electronic states influenced by AC fields.

Findings

Analytical representation of electronic states as a function of field parameters

Identification of orthogonal subspaces with different angular momentum components

Comparison of low- and high-frequency regimes in AC-field effects

Abstract

We present a theoretical approach to study the effects of an ac-field applied to quantum dots with semi-spherical symmetry. Using the Floquet formalism for this periodically driven system, the time-dependent Hamiltonian in the effective mass approximation is solved. We show that the Hilbert space of solutions is separated into orthogonal subspaces with different $z$-component of the angular momentum. We give an explicit analytical representation for electronic states as a function of the intensity and frequency of the electric field. Under the two level approximation, two particular cases are studied: the low- and high-frequency regimes, which result of comparing the ac-field frequency to the characteristic level splitting at zero field.