Ultra-precise holographic optical tweezers array

TL;DR

This paper introduces advanced optimization techniques and measurement schemes to produce ultra-precise holographic optical tweezers arrays with exceptional homogeneity and positioning accuracy, enhancing quantum science applications.

Contribution

The authors develop novel hologram calculation and measurement methods that significantly improve the homogeneity and precision of optical tweezer arrays generated by SLMs.

Findings

Intensity homogeneity with 0.3% standard deviation achieved

Shape variations below 0.5% demonstrated

Positioning errors within 70 nm realized

Abstract

Neutral atoms trapped in microscopic optical tweezers have emerged as a growing platform for quantum science. Achieving homogeneity over the tweezers array is an important technical requirement, and our research focuses on improving it for holographic arrays generated with a Spatial Light Modulator (SLM). We present a series of optimization methods to calculate better holograms, fueled by precise measurement schemes. These innovations enable to achieve intensity homogeneity with a relative standard deviation of 0.3 %, shape variations below 0.5 %, and positioning errors within 70 nm. Such ultra-precise holographic optical tweezers arrays allow for the most demanding applications in quantum science with atomic arrays.