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arXiv · 1006.4192

Imaging trapped ions with a microfabricated lens for quantum information processing

Erik W. Streed·Benjamin G. Norton·Andreas Jechow·Till J. Weinhold·David Kielpinski
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Abstract

Trapped ions are a leading system for realizing quantum information processing (QIP). Most of the technologies required for implementing large-scale trapped-ion QIP have been demonstrated, with one key exception: a massively parallel ion-photon interconnect. Arrays of microfabricated phase Fresnel lenses (PFL) are a promising interconnect solution that is readily integrated with ion trap arrays for large-scale QIP. Here we show the first imaging of trapped ions with a microfabricated in-vacuum PFL, demonstrating performance suitable for scalable QIP. A single ion fluorescence collection efficiency of 4.2 +/- 1.5% was observed, in agreement with the previously measured optical performance of the PFL. The contrast ratio between the ion signal and the background scatter was 23 +/- 4. The depth of focus for the imaging system was 19.4 +/- 2.4 μm and the field of view was 140 +/- 20 μm. Our approach also provides an integrated solution for high-efficiency optical coupling in neutral atom and solid state QIP architectures.

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Erik W. Streed, Benjamin G. Norton, Andreas Jechow, Till J. Weinhold, David Kielpinski. 2010-10-26. Imaging trapped ions with a microfabricated lens for quantum information processing. https://doi.org/10.1103/physrevlett.106.010502

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