New paper on multilayer ion trap fabrication published in New Journal of Physics

SEM micrograph of the central part of a trap chip fabricated using the MLP method. White and black arrows are drawn on top of the microwave conductors as a guide for the eye.

In a paper published today we present a novel ion trap fabrication method enabling the realization of multilayer ion traps scalable to an in principle arbitrary number of metal-dielectric levels.

We benchmarked our method by fabricating a multilayer ion trap with integrated three-dimensional microwave circuitry. In addition we demonstrated ion trapping and microwave control of the hyperfine states of a laser cooled 9Be+ ion held at a distance of 35 µm above the trap surface.

This method can be used to implement large-scale ion trap arrays for scalable quantum information processing and quantum simulation.