title: Imaging of trapped ions with a microfabricated optic for quantum information processing.
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. 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.
authors.affiliation: Centre for Quantum Dynamics, Griffith University, Brisbane 4111, QLD, Australia. e.streed@griffith.edu.au
authors.forename: Erik W
authors.initials: EW
authors.lastname: Streed
authors.forename: Benjamin G
authors.initials: BG
authors.lastname: Norton
authors.forename: Andreas
authors.initials: A
authors.lastname: Jechow
authors.forename: Till J
authors.initials: TJ
authors.lastname: Weinhold
authors.forename: David
authors.initials: D
authors.lastname: Kielpinski