Simultaneous sub-second hyperpolarization of the nuclear and electron spins of phosphorus in silicon

Abstract

We demonstrate a method which can hyperpolarize both the electron and nuclear spins of 31P donors in Si at low field, where both would be essentially unpolarized in equilibrium. It is based on the selective ionization of donors in a specific hyperfine state by optically pumping donor bound exciton hyperfine transitions, which can be spectrally resolved in 28Si. Electron and nuclear polarizations of 90% and 76%, respectively, are obtained in less than a second, providing an initialization mechanism for qubits based on these spins, and enabling further ESR and NMR studies on dilute 31P in 28Si.

4 pages, 3 figures

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• Two-level system hyperpolarization using a quantum Szilard engine
• Electrical Detection and Magnetic-Field Control of Spin States in Phosphorus-Doped Silicon
• Optically detected NMR of optically hyperpolarized 31P neutral donors in 28Si
• Nuclear Spin Dynamics of Ionized Phosphorus Donors in Silicon
• Coherent Rabi dynamics of a superradiant spin ensemble in a microwave cavity
• Hybrid optical-electrical detection of donor electron spins with bound excitons in silicon
• Decay of nuclear hyperpolarization in silicon microparticles
• Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically-enriched silicon-28 crystal
• Optical Control of Donor Spin Qubits in Silicon
• Zero field optical magnetic resonance study of phosphorus donors in 28-silicon
• Quantum read-out and fast initialization of nuclear spin qubits with electric currents
• Low Temperature Relaxation of Donor Bound Electron Spins in ${}^{28}$Si:P
• Electron nuclear double resonance with donor-bound excitons in silicon
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