Comment on “Optically pumped spin-exchange polarized-electron source”

J. F. Williams, S. Samarin, and L. Pravica
Phys. Rev. A 91, 056703 – Published 26 May 2015

Abstract

M. Pirbhai et al. [Phys. Rev. A 88, 060701(R) (2013)] reported a new optically pumped spin-exchange polarized-electron source developed to avoid the limitations of the traditional GaAs-type source and to enable a broader range of experiments. The spin-exchange gaseous source has introduced its own limitations with 650-mW laser power producing only 4μA of spin-polarized current with a 24% polarization and a 2-eV energy spread depending markedly on tenuous roles of various buffer gases which we consider are not explained cogently. Spin-related beam experiments over many decades have significant achievements using GaAs spin sources.

  • Received 30 June 2014
  • Revised 31 October 2014

DOI:https://doi.org/10.1103/PhysRevA.91.056703

©2015 American Physical Society

Authors & Affiliations

J. F. Williams*, S. Samarin, and L. Pravica

  • Australian Research Council Centre for Antimatter and Matter Studies (CAMS), Centre for Atomic, Molecular and Surface Physics (CAMSP), School of Physics, The University of Western Australia, Crawley, Perth, Western Australia 6009, Australia

  • *jim.williams@uwa.edu.au

Comments & Replies

Reply to ``Comment on `Optically pumped spin-exchange polarized-electron source' ''

M. Pirbhai, J. Knepper, E. T. Litaker, D. Tupa, and T. J. Gay
Phys. Rev. A 91, 056704 (2015)

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Original Article

Optically pumped spin-exchange polarized-electron source

M. Pirbhai, J. Knepper, E. T. Litaker, D. Tupa, and T. J. Gay
Phys. Rev. A 88, 060701(R) (2013)

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Vol. 91, Iss. 5 — May 2015

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