Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe${}_2$

Abstract

Local deformation of atomically thin van der Waals materials provides a powerful approach to create site-controlled chip-compatible single-photon emitters (SPEs). However, the microscopic mechanisms underlying the formation of such strain-induced SPEs are still not fully clear, which hinders further efforts in their deterministic integration with nanophotonic structures for developing practical on-chip sources of quantum light. Here we investigate SPEs with single-photon purity up to 98% created in monolayer WSe${}_2$ via nanoindentation. Using photoluminescence imaging in combination with atomic force microscopy, we locate single-photon emitting sites on a deep sub-wavelength spatial scale and reconstruct the details of the surrounding local strain potential. The obtained results suggest that the origin of the observed single-photon emission is likely related to strain-induced spectral shift of dark excitonic states and their hybridization with localized states of individual defects.

arXiv comment8 pages, 4 figures

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Cited by in corpus (8)

• Roadmap for Photonics with 2D Materials
• Dynamic Tuning of Single-Photon Emission in Monolayer WSe2 via Localized Strain Engineering
• Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
• Wetting and Strain Engineering of 2D Materials on Nanopatterned Substrates
• High Temperature Quantum Emission from Covalently Functionalized van der Waals Heterostructures
• First-principles computational methods for quantum defects in two-dimensional materials: A perspective
• Layered semiconductors integrated with polyimide thin films for high-quality valleytronic and quantum-photonic systems
• Deterministic and Scalable Quantum Light Generation in DNA Origami-Programmed Organic Molecule-MoS${}_2$ Monolayer Hybrids