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Type: Journal article
Title: Stimulated Raman adiabatic passage for improved performance of a cold-atom electron and ion source
Author: Sparkes, B.
Murphy, D.
Taylor, R.
Speirs, R.
McCulloch, A.
Scholten, R.
Citation: Physical Review A, 2016; 94(2):023404-1-023404-8
Publisher: American Physical Society.
Issue Date: 2016
ISSN: 2469-9926
Statement of
B. M. Sparkes, D. Murphy, R. J. Taylor, R. W. Speirs, A. J. McCulloch and R. E. Scholten
Abstract: We implement high-efficiency coherent excitation to a Rydberg state using stimulated Raman adiabatic passage in a cold-atom electron and ion source.We achieve an efficiency of 60% averaged over the laser excitation volume with a peak efficiency of 82%, a 1.6 times improvement relative to incoherent pulsed-laser excitation. Using pulsed electric field ionization of the Rydberg atoms we create electron bunches with durations of 250 ps. High-efficiency excitation will increase source brightness, crucial for ultrafast electron diffraction experiments, and coherent excitation to high-lying Rydberg states could allow for the reduction of internal bunch heating and the creation of a high-speed single-ion source.
Rights: ©2016 American Physical Society
RMID: 0030068475
DOI: 10.1103/PhysRevA.94.023404
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Appears in Collections:Physics publications

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