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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

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Interaction between an Optically Levitated Nanoparticle and Its Thermal Image: Internal Thermometry via Displacement

Thomas Agrenius¹, Carlos Gonzalez-Ballestero¹, Patrick Maurer¹

¹Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria and Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.

Physical Review Letters

|March 17, 2023

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We propose a method to measure nanoparticle-surface interactions using optically levitated nanoparticles. This technique can function as an internal thermometer for levitated nanoparticles, crucial for quantum experiments.

Area of Science:

Quantum physics
Optomechanics
Nanotechnology

Background:

Optically levitated nanoparticles are key systems for quantum mechanics research.
Understanding nanoparticle internal physics is vital for quantum superposition experiments.

Purpose of the Study:

To propose and analyze an experiment for measuring nanoparticle-surface interactions.
To develop a method for internal thermometry of levitated nanoparticles.

Main Methods:

Using displacement sensing of an optically levitated nanoparticle.
Employing a surface transparent to trapping light but reflective to infrared radiation.
Modulating surface reflectivity over time.

Main Results:

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Related Experiment Videos

Last Updated: Aug 6, 2025

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Published on: April 4, 2017

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

The experiment measures induced dipole-dipole interaction between nanoparticle and its thermal image.

The interaction force is significantly stronger than the thermal gradient force.

The force depends on nanoparticle internal temperature at distances >2 micrometers.

Conclusions:

The proposed method is experimentally feasible for internal thermometry of levitated nanoparticles in ultrahigh vacuum.
This technique provides crucial insights into decoherence limitations in quantum state preparation.