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arXiv · 1809.10228

Characterization of the Si:Se+ spin-photon interface

Adam DeAbreu·Camille Bowness·Rohan J. S. Abraham·Alzbeta Medvedova·Kevin J. Morse·Helge Riemann·Nikolay V. Abrosimov·Peter Becker·Hans-Joachim Pohl·Michael L. W. Thewalt·Stephanie Simmons
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Abstract

Silicon is the most developed electronic and photonic technological platform and hosts some of the highest-performance spin and photonic qubits developed to date. A hybrid quantum technology harnessing an efficient spin-photon interface in silicon would unlock considerable potential by enabling ultra-long-lived photonic memories, distributed quantum networks, microwave to optical photon converters, and spin-based quantum processors, all linked using integrated silicon photonics. However, the indirect bandgap of silicon makes identification of efficient spin-photon interfaces nontrivial. Here we build upon the recent identification of chalcogen donors as a promising spin-photon interface in silicon. We determined that the spin-dependent optical degree of freedom has a transition dipole moment stronger than previously thought (here 1.96(8) Debye), and the T1 spin lifetime in low magnetic fields is longer than previously thought (> 4.6(1.5) hours). We furthermore determined the optical excited state lifetime (7.7(4) ns), and therefore the natural radiative efficiency (0.80(9) %), and by measuring the phonon sideband, determined the zero-phonon emission fraction (16(1) %). Taken together, these parameters indicate that an integrated quantum optoelectronic platform based upon chalcogen donor qubits in silicon is well within reach of current capabilities.

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Adam DeAbreu, Camille Bowness, Rohan J. S. Abraham, Alzbeta Medvedova, Kevin J. Morse, Helge Riemann, Nikolay V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Michael L. W. Thewalt, Stephanie Simmons. 2018-09-26. Characterization of the Si:Se+ spin-photon interface. https://doi.org/10.1103/physrevapplied.11.044036

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