2009/03/31 by A. Yang, Michael F. Steger, M. Steger +12 · 55 citations
Biochemistry, Genetics and Molecular Biology · Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic physics #Condensed matter physics #Electron #Electron Spin Resonance Studies #Exciton #Hyperfine structure #Hyperpolarization (physics) #Ion #Ionization #Laser #Materials science #Molecular physics #Nuclear magnetic resonance #Nuclear magnetic resonance spectroscopy #Nuclear physics #Optical pumping #Optics #Optoelectronics #Physics #Quantum and electron transport phenomena #Silicon #Spins #quant-ph
paper · pdf · doi:10.1103/physrevlett.102.257401
published in Physical Review Letters 102(25), 257401 (American Physical Society) · 4 pages, 3 figures
openalex publication_date 2009/06/25 · arxiv created 2009/08/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.