Energy levels and transition frequency of strong-coupling polaron in a Gaussian quantum dot

Abstract

In the present work, the energy levels and transition frequency between relevant levels of the strong-coupling polaron in a Gaussian quantum dot is studied. In this regard, we have used the well known Lee–Low–Pines unitary transformation method and the Pekar type variational procedure. We show the effect of the effective confinement length and electron–phonon (e–p) coupling strength on energy levels and the transition frequency. According to the results, it is found that the energy levels are decreased with increasing the e–p coupling strength. Also, the transition frequency is increased with enhancing the e–p coupling strength. The energy levels and transition frequency are increased with decreasing the effective confinement lengths.