Zeeman and hyperfine interactions of a single <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Er</mml:mi><mml:none/><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow><mml:mprescripts/><mml:none/><mml:mn>167</mml:mn></mml:mmultiscripts></mml:math> ion in Si
Jiliang Yang, Wenda Fan, Yangbo Zhang, Chang‐Kui Duan, Gabriele G. de Boo, Rose L. Ahlefeldt, Jevon J. Longdell, Brett C. Johnson, Jeffrey C. McCallum, Matthew J. Sellars, Sven Rogge, Chunming Yin, Jiangfeng Du
Abstract
Er-doped Si is a promising candidate for quantum information applications due to its telecom wavelength optical transition and its compatibility with Si nanofabrication technologies. Recent spectroscopic studies based on photoluminescence excitation have shown multiple well-defined lattice sites that Er occupies in Si. Here we report a measurement of the Zeeman and hyperfine tensors of a single $^{167}\mathrm{Er}^{3+}$ ion in Si. All the obtained tensors are highly anisotropic with the largest value principal axes aligning in nearly the same direction, and the trace of the lowest crystal field level $\mathbf{g}$-tensor is $17.78\ifmmode\pm\else\textpm\fi{}0.40$. The results indicate that this specific Er site is likely to be a distorted cubic site that exhibits monoclinic (${\mathrm{C}}_{1}$) symmetry. Finally, zero first-order-Zeeman fields are identified for this site and could be used to reduce decoherence of hyperfine spin states in future experiments.