Design, fabrication and characterisation of a micro-fabricated double-junction segmented ion trap

TL;DR

This paper presents the design, fabrication, and initial testing of a novel 3D micro-fabricated double-junction ion trap capable of complex ion transport and reconfiguration, advancing quantum information processing hardware.

Contribution

It introduces a new triple-layer silica glass ion trap with integrated junctions and detailed fabrication, simulation, and testing procedures.

Findings

Successful fabrication of a 3D ion trap with 142 electrodes

Initial measurements show manageable heating rates

Demonstrated ion transport through junctions

Abstract

We describe the implementation of a three-dimensional Paul ion trap fabricated from a stack of precision-machined silica glass wafers, which incorporates a pair of junctions for 2-dimensional ion transport. The trap has 142 dedicated electrodes which can be used to define multiple potential wells in which strings of ions can be held. By supplying time-varying potentials, this also allows for transport and re-configuration of ion strings. We describe the design, simulation, fabrication and packaging of the trap, including explorations of different parameter regimes and possible optimizations and design choices. We give results of initial testing of the trap, including measurements of heating rates and junction transport.