Photoionization of strontium for trapped-ion quantum information processing
Abstract
We report a demonstration of simple and effective loading of strontium ions into a linear radio frequency Paul trap using photoionization. The ionization pathway is 5s2 1S0 -- 5s5p 1P1 -- 5p2 1D2, and the 5p2 1D2 final state is auto-ionizing. Both transitions are driven using diode lasers: a grating-stabilized 922 nm diode doubled in a single pass through potassium niobate to 461 nm and a bare diode at 405 nm. Using this technique, we have reduced the background pressure during the ion loading process by a factor of 2 compared to the conventional technique of electron bombardment. Initial ion temperatures are low enough that the ions immediately form crystals. It is also possible to observe the trapping region with a CCD camera during ion creation, allowing specific ion number loading with high probability.
Cite
@article{arxiv.quant-ph/0607055,
title = {Photoionization of strontium for trapped-ion quantum information processing},
author = {K. Vant and J. Chiaverini and W. Lybarger and D. J. Berkeland},
journal= {arXiv preprint arXiv:quant-ph/0607055},
year = {2007}
}
Comments
7 pages, 3 figures, RevTeX4