# An Optical Tweezer Array of Ultracold Molecules

## TL;DR

This paper reports the creation of an optical tweezer array of ultracold CaF molecules, demonstrating high-density trapping and observing molecule-molecule collisions without light interference, advancing quantum simulation and measurement capabilities.

## Contribution

It introduces a novel method to trap single ultracold molecules in an optical tweezer array using light-induced collisions during laser cooling.

## Key findings

- Successful trapping of single ultracold CaF molecules.
- Observation of molecule-molecule collisions without light.
- High-density trapping enabling new studies.

## Abstract

Arrays of single ultracold molecules promise to be a powerful platform for many applications ranging from quantum simulation to precision measurement. Here we report on the creation of an optical tweezer array of single ultracold CaF molecules. By utilizing light-induced collisions during the laser cooling process, we trap single molecules. The high densities attained inside the tweezer traps have also enabled us to observe in the absence of light molecule-molecule collisions of laser cooled molecules for the first time.