Quantum Confinement Emissions in Strained Monolayer WSe<sub>2</sub>: A Nanoscale Approach to Single-Photon Emitters via Tip-Enhanced Techniques.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41863440.
- Also identified by DOI 10.1021/acsnano.5c18642 and PMC identifier 13063805.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
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.