Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically enriched silicon-28 crystal

P. Gumann, O. Patange, C. Ramanathan, H. Haas, O. Moussa, M. L W Thewalt, H. Riemann, N. V. Abrosimov, P. Becker, H. J. Pohl, Kohei M Itoh, D. G. Cory

Research output: Contribution to journalArticle

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Abstract

We experimentally demonstrate the first inductive readout of optically hyperpolarized phosphorus-31 donor nuclear spins in an isotopically enriched silicon-28 crystal. The concentration of phosphorus donors in the crystal was 1.5×1015 cm-3, 3 orders of magnitude lower than has previously been detected via direct inductive detection. The signal-to-noise ratio measured in a single free induction decay from a 1 cm3 sample (≈1015 spins) was 113. By transferring the sample to an X-band ESR spectrometer, we were able to obtain a lower bound for the nuclear spin polarization at 1.7 K of ∼64%. The P31-T2 measured with a Hahn echo sequence was 420 ms at 1.7 K, which was extended to 1.2 s with a Carr Purcell cycle. The T1 of the P31 nuclear spins at 1.7 K is extremely long and could not be determined, as no decay was observed even on a time scale of 4.5 h. Optical excitation was performed with a 1047 nm laser, which provided above-band-gap excitation of the silicon. The buildup of the hyperpolarization at 4.2 K followed a single exponential with a characteristic time of 577 s, while the buildup at 1.7 K showed biexponential behavior with characteristic time constants of 578 and 5670 s.

Original languageEnglish
Article number267604
JournalPhysical Review Letters
Volume113
Issue number26
DOIs
Publication statusPublished - 2014 Dec 30

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nuclear spin
nuclei
phosphorus
silicon
crystals
decay
superhigh frequencies
time constant
excitation
readout
echoes
induction
signal to noise ratios
spectrometers
cycles
polarization
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Gumann, P., Patange, O., Ramanathan, C., Haas, H., Moussa, O., Thewalt, M. L. W., ... Cory, D. G. (2014). Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically enriched silicon-28 crystal. Physical Review Letters, 113(26), [267604]. https://doi.org/10.1103/PhysRevLett.113.267604

Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically enriched silicon-28 crystal. / Gumann, P.; Patange, O.; Ramanathan, C.; Haas, H.; Moussa, O.; Thewalt, M. L W; Riemann, H.; Abrosimov, N. V.; Becker, P.; Pohl, H. J.; Itoh, Kohei M; Cory, D. G.

In: Physical Review Letters, Vol. 113, No. 26, 267604, 30.12.2014.

Research output: Contribution to journalArticle

Gumann, P, Patange, O, Ramanathan, C, Haas, H, Moussa, O, Thewalt, MLW, Riemann, H, Abrosimov, NV, Becker, P, Pohl, HJ, Itoh, KM & Cory, DG 2014, 'Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically enriched silicon-28 crystal', Physical Review Letters, vol. 113, no. 26, 267604. https://doi.org/10.1103/PhysRevLett.113.267604
Gumann, P. ; Patange, O. ; Ramanathan, C. ; Haas, H. ; Moussa, O. ; Thewalt, M. L W ; Riemann, H. ; Abrosimov, N. V. ; Becker, P. ; Pohl, H. J. ; Itoh, Kohei M ; Cory, D. G. / Inductive measurement of optically hyperpolarized phosphorous donor nuclei in an isotopically enriched silicon-28 crystal. In: Physical Review Letters. 2014 ; Vol. 113, No. 26.
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