Coherent Spin-Photon Interface with Waveguide Induced Cycling Transitions

Appel, M.H. and Tiranov, A. and Javadi, A. and Löbl, M.C. and Wang, Y. and Scholz, S. and Wieck, A.D. and Ludwig, Ar. and Warburton, R.J. and Lodahl, P.

Volume: 126 Pages:
DOI: 10.1103/PhysRevLett.126.013602
Published: 2021

Solid-state quantum dots are promising candidates for efficient light-matter interfaces connecting internal spin degrees of freedom to the states of emitted photons. However, selection rules prevent the combination of efficient spin control and optical cyclicity in this platform. By utilizing a photonic crystal waveguide we here experimentally demonstrate optical cyclicity up to ≈15 through photonic state engineering while achieving high fidelity spin initialization and coherent optical spin control. These capabilities pave the way towards scalable multiphoton entanglement generation and on-chip spin-photon gates. © 2021 American Physical Society. All rights reserved.

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