Nanoparticle stressor-induced single-photon sources in monolayer WS2 emitting into a narrowband visible spectral range
Abstract
A van der Waals heterostructure containing an atomically thin monolayer (ML) transition-metal dichalcogenide as a single-photon emitting layer is emerging as an intriguing solid-state quantum-photonic platform. Here, we report the utilization of spin-coating of silica nanoparticles for semi-deterministically creating the spectrally isolated, energetically stable, and narrow-linewidth single-photon emitters in ML-WS2. We also demonstrate that long-duration low-temperature annealing of the photonic heterostructure in the vacuum removes the energetically unstable emitters that are present due to fabrication-associated residue and lead to the emission of single-photons in a $\lt$ 25 nm narrowband visible spectral range centered at ~620 nm. This work may pave the way toward realizing a hybrid-quantum-photonic platform containing a van der Waals heterostructure/device and an atomic-vapor system emitting/absorbing in the same visible spectral range.
- Publication:
-
2D Materials
- Pub Date:
- July 2024
- DOI:
- 10.1088/2053-1583/ad4b38
- arXiv:
- arXiv:2310.07578
- Bibcode:
- 2024TDM....11c1002S
- Keywords:
-
- nanoparticle;
- strain;
- transition metal dichacogenides;
- WS<SUB>2</SUB>;
- single-photon emitter;
- annealing;
- Physics - Applied Physics;
- Quantum Physics
- E-Print:
- 5 figures