Interseries dipole transitions from yellow to green excitons in cuprous oxide

TL;DR

This paper investigates dipole interseries transitions between yellow and green excitons in cuprous oxide, incorporating complex valence band structure to improve understanding of optical excitations beyond simple models.

Contribution

It extends previous models by including complex valence band effects in the calculation of interseries exciton transitions in cuprous oxide.

Findings

Enhanced understanding of exciton transition mechanisms.

Improved theoretical modeling of exciton spectra.

Validation against experimental data expected.

Abstract

We study dipole interseries transitions between the yellow and green exciton series in cuprous oxide including the complex valence band structure. To this end, we extend previous studies of the spectrum of complex green exciton resonances [Phys. Rev. B 101, 075208 (2020)] to optical transitions between different exciton states in addition to transitions from the crystal ground state. This allows us to augment the calculations on interseries transitions using a hydrogen-like model [Phys. Rev. B 100, 085201 (2019)] by a more comprehensive treatment of the valence band structure.