The optical properties of dibenzoterrylene

TL;DR

This paper uses advanced quantum calculations to analyze the optical properties of dibenzoterrylene, providing insights relevant for its application as a single photon source in quantum technologies.

Contribution

It applies a configuration interaction approach to compute the optical spectra and transition properties of DBT, offering detailed insights into its suitability for optical applications.

Findings

No significant competing optical processes at most photon energies.

Identification of bright states due to two-photon absorption.

Detailed spectra and transition distributions of DBT.

Abstract

Dibenzoterrylene (DBT) has garnered interest as a potential single photon source (SPS). To have a better grasp of any possible limitations of using DBT for this application, a better understanding of its optical properties is needed. We use a configuration interaction (CI) strategy to calculate the many body wavefunctions of DBT, and we use these wavefunctions to calculate its optical properties. We calculate the linear absorption spectrum and the spatial distributions of electrons involved in several bright transitions. We also calculate the two-photon absorption spectrum of DBT and show that there are several excited states that are bright due to two-photon absorption. Except at high photon energies, we predict that there are no competing optical processes regarding the use of DBT as a SPS. Our calculations provide details of the optical properties of DBT that are interesting in general, and useful for considering optical applications of DBT.