# Super-resolution imaging of a low frequency levitated oscillator

## TL;DR

This paper presents a super-resolution imaging technique for low frequency levitated nanoparticles, achieving high sensitivity and long-term monitoring, offering a competitive alternative to optical detection methods.

## Contribution

The authors demonstrate a simple super-resolution imaging method to measure and monitor levitated nanoparticle motion with high sensitivity over extended periods.

## Key findings

- Achieved displacement sensitivity better than 10^{-16} m^2/Hz.
- Extended continuous monitoring of particle dynamics over weeks.
- Reduced noise floor and increased bandwidth using super-resolution imaging.

## Abstract

We describe the measurement of the secular motion of a levitated nanoparticle in a Paul trap with a CMOS camera. This simple method enables us to reach signal-to-noise ratios as good as 10$^{6}$ with a displacement sensitivity better than 10$^{-16}\,m^{2}$/Hz. This method can be used to extract trap parameters as well as the properties of the levitated particles. We demonstrate continuous monitoring of the particle dynamics on timescales of the order of weeks. We show that by using the improvement given by super-resolution imaging, a significant reduction in the noise floor can be attained, with an increase in the bandwidth of the force sensitivity. This approach represents a competitive alternative to standard optical detection for a range of low frequency oscillators where low optical powers are required