Abstract
AbstractLocal 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 WSe2 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.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference47 articles.
1. Aharonovich, I., Englund, D. & Toth, M. Solid-state single-photon emitters. Nat. Photonics 10, 631–641 (2016).
2. Eisaman, M. D., Fan, J., Migdall, A. & Polyakov, S. V. Invited review article: Single-photon sources and detectors. Rev. Sci. Instrum. 82, 071101 (2011).
3. Toth, M. & Aharonovich, I. Single photon sources in atomically thin materials. Annu. Rev. Phys. Chem. 70, 123–142 (2019).
4. Kumar, A. & Ahluwalia, P. Electronic structure of transition metal dichalcogenides monolayers 1H-MX2 (M=Mo, W; X=S, Se, Te) from ab-initio theory: new direct band gap semiconductors. Eur. Phys. J. B 85, 186 (2012).
5. Mueller, T. & Malic, E. Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors. npj 2D Mater. Appl. 2, 29 (2018).
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献