Integrated scalable metalens array for optical addressing

TL;DR

This paper presents a numerically designed integrated scalable metalens array operating in the UV range, capable of focusing multiple beams with low crosstalk and high efficiency for optical addressing in quantum computing and trapping.

Contribution

The paper introduces a novel integrated scalable metalens array design that achieves diffraction-limited focusing with low crosstalk and high efficiency in the UV spectrum.

Findings

Focusing efficiency of 36.90% achieved.

Crosstalk below 0.82% demonstrated.

Design applicable to optical trapping and quantum computing.

Abstract

The scalability of optical addressing is one of the key challenges for the large-scale trapped-ion quantum computing (QC). Metasurfaces is a promising solution due to excellent optical performance, integration, and miniaturization. Here, we propose and numerically demonstrate a design of integrated scalable metalens array (ISMA) working in the UV 350nm range for optical addressing. These ISMAs can focus the collimated individual addressing beams array into diffraction-limited spots array, featuring crosstalk below 0.82%, focusing efficiency as high as 36.90%. For various applications, the x-polarized, polarization-insensitive and right-handed circularly polarized ISMA are designed. The design proposed in this paper can also find applications in optical trapping.