Nanoparticle Stressor-Induced Single-photon Sources in Monolayer WS$_2$ Emitting into a Narrowband Visible Spectral Range

• URL: http://arxiv.org/abs/2310.07578v1
• Date: Wed, 11 Oct 2023 15:19:02 GMT
• Title: Nanoparticle Stressor-Induced Single-photon Sources in Monolayer WS$_2$ Emitting into a Narrowband Visible Spectral Range
• Authors: J. Thoppil S, Y. Waheed, S. Shit, I. D. Prasad, K. Watanabe, T. Taniguchi, and S. Kumar
• Abstract summary: A van der Waals heterostructure containing an atomically thin monolayer transition-metal dichalcogenide as a single-photon emitting layer is emerging as an intriguing solid-state quantum-photonic platform.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A van der Waals heterostructure containing an atomically thin monolayer 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 deterministically creating the spectrally isolated, energetically stable, and narrow-linewidth single-photon emitters in ML-WS$_2$. 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 <25 nm narrowband visible spectral range centered at $\sim$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.

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