Download file (2.13 MB)
Download as zip (1.71 MB)

Collection

Citation

Description:

Interactions between out-of-plane dipoles in bosonic gases enable the long-range propagation of excitons. The lack of direct control over collective dipolar properties has hitherto limited the degrees of tunability and the microscopic understanding of exciton transport. In this work, we modulate the layer hybridization and interplay between many-body interactions of excitons in a van der Waals heterostructure with an applied vertical electric field. By performing spatiotemporally resolved measurements supported by microscopic theory, we uncover the dipole-dependent properties and transport of excitons with different degrees of hybridization. Moreover, we find constant emission quantum yields of the transporting species as a function of excitation power with dominating radiative decay mechanisms over nonradiative ones, a fundamental requirement for efficient excitonic devices. Our findings provide a complete picture of the many-body effects in the transport of dilute exciton gases and have crucial implications for the study of emerging states of matter, such as Bose-Einstein condensation, as well as for optoelectronic applications based on exciton propagation.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Dipoles, excitons, van der Waals heterostructure

Date published: 2023-04-20

Publisher: Springer Science and Business Media LLC

Journal:

• Nature Photonics (ISSN: 17494893) vol. 17 issue. 7 p. 615-621

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s41566-023-01198-w

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-02-23 22:46:01 +0900

Published on MDR: 2025-02-23 22:46:01 +0900