Two Biexciton Types Coexisting in Coupled Quantum Dot Molecules.

ABSTRACT: Coupled colloidal quantum dot molecules (CQDMs) are an emerging class of nanomaterials, manifesting two coupled emission centers and thus introducing additional degrees of freedom for designing quantum-dot-based technologies. The properties of multiply excited states in these CQDMs are crucial to their performance as quantum light emitters, but they cannot be fully resolved by existing spectroscopic techniques. Here we study the characteristics of biexcitonic species, which represent a rich landscape of different configurations essentially categorized as either segregated or localized biexciton states. To this end, we introduce an extension of Heralded Spectroscopy to resolve the different biexciton species in the prototypical CdSe/CdS CQDM system. By comparing CQDMs with single qua

SUBMITTER: Frenkel N 

PROVIDER: S-EPMC10416571 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature