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Proceedings Paper

Precision alignment of integrated optics in surface electrode ion traps for quantum information processing
Author(s): Amber L. Young; Jeffrey D. Hunker; A. Robert Ellis; Sally Samora; Joel R. Wendt; Daniel L. Stick
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Paper Abstract

The integration of optics for efficient light delivery and the collection of fluorescence from trapped ions in surface electrode ion traps is a key component to achieving scalability for quantum information processing. Diffractive optical elements (DOEs) present a promising approach as compared to bulk optics because of their small physical profile and their flexibility in tailoring the optical wavefront. The precise alignment of the optics for coupling fluorescence to and from the ions, however, poses a particular challenge. Excitation and manipulation of the ions requires a high degree of optical access, significantly restricting the area available for mounting components. The ion traps, DOEs, and other components are compact, constraining the manipulation of various elements. For efficient fluorescence collection from the ions the DOE must be have a large numerical aperture (NA), which results in greater sensitivity to misalignment. The ion traps are sensitive devices, a mechanical approach to alignment such as contacting the trap and using precision motors to back-off a set distance not only cannot achieve the desired alignment precision, but risks damage to the ion trap. We have developed a non-contact precision optical alignment technique. We use line foci produced by off-axis linear Fresnel zone plates (FZPs) projected on alignment targets etched in the top metal layer of the ion trap and demonstrate micron-level alignment accuracy.

Paper Details

Date Published: 8 March 2014
PDF: 8 pages
Proc. SPIE 8989, Smart Photonic and Optoelectronic Integrated Circuits XVI, 89890L (8 March 2014); doi: 10.1117/12.2040795
Show Author Affiliations
Amber L. Young, Sandia National Labs. (United States)
Jeffrey D. Hunker, Sandia National Labs. (United States)
A. Robert Ellis, Sandia National Labs. (United States)
Sally Samora, Sandia National Labs. (United States)
Joel R. Wendt, Sandia National Labs. (United States)
Daniel L. Stick, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 8989:
Smart Photonic and Optoelectronic Integrated Circuits XVI
Louay A. Eldada; El-Hang Lee; Sailing He, Editor(s)

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