Ion Trapping with a Laser-written 3D Miniaturized Monolithic Linear Paul Trap for Microcavity Integration

TL;DR

This paper introduces a novel 3D monolithic ion trap fabricated with laser writing and selective etching, enabling precise ion trapping and integration with microcavities for advanced quantum applications.

Contribution

It presents a fully monolithic, laser-written ion trap with integrated electrodes, eliminating post-fabrication alignment and facilitating microcavity integration.

Findings

Successful ion trapping demonstrated

High numerical aperture access achieved

Trap characterized with promising performance

Abstract

The miniaturization of ion trap and the precise placement of its electrodes are necessary for the integration of a microcavity to facilitate efficient ion-cavity coupling. We present a miniature monolithic ion trap made of gold-coated fused silica with high numerical aperture access. A laser writing method referred to as selective laser etching is employed to extract a trap structure from a block of fused silica. The fully monolithic structure eliminates the need for any post-fabrication alignment. Trenches are integrated into this structure such that the various electrodes on the monolithic device remain electrically isolated following their metalization via evaporative coating. We give details of the trap design and production, along with the demonstration of successful trapping of ions and characerization of the trap.