Generation of narrowband quantum emitters in hBN with optically addressable spins

• URL: http://arxiv.org/abs/2501.15341v1
• Date: Sat, 25 Jan 2025 22:56:56 GMT
• Title: Generation of narrowband quantum emitters in hBN with optically addressable spins
• Authors: Benjamin Whitefield, Helen Zhi Jie Zeng, James Liddle-Wesolowski, Islay O. Robertson, Viktor Ivády, Kenji Watanabe, Takashi Taniguchi, Milos Toth, Jean-Philippe Tetienne, Igor Aharonovich, Mehran Kianinia,
• Abstract summary: We report on a single step, thermal processing of hBN flakes that produces high density, narrowband, quantum emitters with optically active spin transitions. Remarkably, over 25% of the emitters exhibit a clear signature of an optical spin readout at room temperature, surpassing all previously reported results by an order of magnitude. Our work advances the understanding of spin complexes in hBN and paves the way for single spin - photon interfaces in layered vdW materials with applications in quantum sensing and information processing.
• Score: 0.16365624921211983
• License:
• Abstract: Electron spins coupled with optical transitions in solids stand out as a promising platform for developing spin-based quantum technologies. Recently, hexagonal boron nitride (hBN) - a layered Van der Waals (vdW) crystal, has emerged as a promising host for optically addressable spin systems. However, to date, on-demand generation of isolated single photon emitters with pre-determined spin transitions has remained elusive. Here, we report on a single step, thermal processing of hBN flakes that produces high density, narrowband, quantum emitters with optically active spin transitions. Remarkably, over 25% of the emitters exhibit a clear signature of an optical spin readout at room temperature, surpassing all previously reported results by an order of magnitude. The generated spin defect complexes exhibit both S = 1 and S = 1/2 transitions, which are explained by charge transfer from strongly to weakly coupled spin pairs. Our work advances the understanding of spin complexes in hBN and paves the way for single spin - photon interfaces in layered vdW materials with applications in quantum sensing and information processing.

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