Influence of resonant plasmonic nanoparticles on optically accessing the valley degree of freedom in 2D semiconductors
The valley degree of freedom in atomically thin transition metal dichalcogenides, coupled with valley-contrasting optical selection rules, holds great potential for future electronic and optoelectronic devices. Resonant optical nanostructures emerge as promising tools for controlling this degree of freedom at the nanoscale. However, their impact on the circular polarization of valley-selective emission remains poorly understood. In our study, we explore a hybrid system where valley-specific emission from a molybdenum disulfide monolayer interacts with a resonant plasmonic nanosphere. Contrary to the simple intuition that a centrosymmetric nanoresonator mostly preserves the degree of circular polarization, our cryogenic experiments reveal significant depolarization of the photoluminescence scattered by the nanoparticle. This striking effect presents an ideal platform for studying the mechanisms governing light-matter interactions in such hybrid systems. Our full-wave numerical analysis provides insights into the key physical mechanisms affecting the polarization response, offering a pathway toward designing novel valleytronic devices.
Authors
- Ziyang Gan (ORCID: https://orcid.org/0000-0001-5707-5765)
- Rajeshkumar Mupparapu (ORCID: https://orcid.org/0000-0002-5028-2427)
- Tobias Bucher (ORCID: https://orcid.org/0000-0003-1335-0432)
- Antony George (ORCID: https://orcid.org/0000-0002-9317-5920)
- Thomas Pertsch (ORCID: https://orcid.org/0000-0003-4889-0869)
- Matthias Wurdack (ORCID: https://orcid.org/0000-0003-3759-9574)
- Mostafa Abasifard (ORCID: https://orcid.org/0000-0002-3143-5993)
- Emad Najafidehaghani (ORCID: https://orcid.org/0000-0002-8860-6423)
- Heiko Knopf
- Zlata Fedorova (ORCID: https://orcid.org/0000-0003-4401-1978)
- Andrey Turchanin (ORCID: https://orcid.org/0000-0003-2388-1042)
- Isabelle Staude (ORCID: https://orcid.org/0000-0001-8021-572X)
- Falk Eilenberger (ORCID: https://orcid.org/0000-0002-4646-2484)
Institutions
- Australian National University (AU)
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies (AU)
- Fraunhofer Institute for Applied Optics and Precision Engineering (DE)
- Jena Bioscience (Germany) (DE)
- Friedrich Schiller University Jena (DE)
- Stanford University (US)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-11-21
- DOI
- https://doi.org/10.1038/s41467-024-54359-y
- Citations
- 8
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.94
Funders
- Deutsche Forschungsgemeinschaft
- Bundesministerium für Bildung und Forschung