Quantum Confinement Emissions in Strained Monolayer WSe <sub>2</sub> : A Nanoscale Approach to Single-Photon Emitters via Tip-Enhanced Techniques
Two-dimensional (2D) semiconductors such as monolayer WSe<sub>2</sub> have attracted significant interest for their quantum properties and potential as scalable single-photon emitters. However, conventional microphotoluminescence (μ-PL) techniques are fundamentally limited by optical diffraction, hindering access to critical nanoscale features such as strain gradients and localized quantum confinement. In this study, we utilize tip-enhanced photoluminescence (NanoPL) with a spatial resolution of ≈10 nm to directly image the emission landscape of monolayer WSe<sub>2</sub> on top of nanopillars at room temperature. Our results reveal two distinct localization regimes associated with leading theoretical models for single-photon activation and provide guidelines for deterministic nanoengineering of quantum light sources.
Authors
- M. D. Teodoro
- Frederico B. Sousa (ORCID: https://orcid.org/0000-0001-7974-9548)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Rafael Nadas (ORCID: https://orcid.org/0000-0001-6165-5981)
- Gustavo H. R. Soares (ORCID: https://orcid.org/0000-0001-9121-3914)
- Maria Clara Godinho
- Leonardo C. Campos (ORCID: https://orcid.org/0000-0001-6792-7554)
- G. M. Jacobsen (ORCID: https://orcid.org/0000-0001-6364-4549)
- Lucas Liberal
- Ado Jorio
- Takashi Taniguchi
Institutions
- Universidade Federal de Minas Gerais (BR)
- Universidade Federal de São Carlos (BR)
- Humboldt-Universität zu Berlin (DE)
- Instituto Nacional de Ciência e Tecnologia em Nanomateriais de Carbono (BR)
- Institut für Technische und Angewandte Physik (Germany) (DE)
- Optica (US)
- University of Regensburg (DE)
Publication Details
- Journal
- ACS Nano
- Published
- 2026-03-21
- DOI
- https://doi.org/10.1021/acsnano.5c18642
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00