Super-resolution imaging of a low frequency levitated oscillator

Area of Science:

• Atomic, Molecular, and Optical Physics
• Nanotechnology
• Experimental Physics

Background:

• Levitated nanoparticles in Paul traps are crucial for precision measurements.
• Traditional detection methods face limitations in sensitivity and bandwidth.
• Accurate characterization of nanoparticle dynamics is essential for various applications.

Purpose of the Study:

• To introduce a novel, high-sensitivity method for measuring nanoparticle secular motion in a Paul trap.
• To demonstrate the capability of this method for long-term monitoring and parameter extraction.
• To explore the benefits of super-resolution imaging for enhanced force sensitivity.

Main Methods:

• Utilizing a CMOS camera for high-resolution imaging of a levitated nanoparticle.
• Implementing super-resolution imaging techniques to improve noise floor and bandwidth.
• Measuring secular motion to extract trap parameters and particle properties.

Main Results:

• Achieved signal-to-noise ratios up to 10^6.
• Demonstrated displacement sensitivity better than 10^-16 m^2/Hz.
• Enabled continuous monitoring of particle dynamics over weeks.
• Showed significant noise reduction and increased force sensitivity bandwidth with super-resolution imaging.

Conclusions:

• The CMOS camera method offers a competitive alternative to standard optical detection for low-frequency oscillators.
• This technique provides high precision for characterizing levitated nanoparticles and their environment.
• The method is suitable for applications requiring low optical power and long-term stability.