Controlling Optomechanical Libration with the Degree of Polarization

Area of Science:

• Optics
• Quantum mechanics
• Nanotechnology

Background:

• Levitodynamics requires precise control over potential energy and free evolution for advanced applications.
• Existing methods offer limited control over the motion of levitated nanoparticles.

Purpose of the Study:

• To demonstrate versatile control over the optical potential of levitated anisotropic nanoparticles.
• To introduce and utilize the degree of polarization as a novel tool in rotational levitodynamics.

Main Methods:

• Experimentally controlling the optical potential governing nanoparticle libration motion.
• Employing the degree of polarization to manipulate rotational dynamics.
• Utilizing rotational degrees of freedom to probe laser beam properties.

Main Results:

• Achieved versatile control over the optical potential for levitated anisotropic nanoparticles.
• Demonstrated thermally driven free rotation around the short axis.
• Successfully probed the local spin of a focused laser beam using rotational degrees of freedom.

Conclusions:

• The degree of polarization is a powerful new tool for rotational levitodynamics.
• This control opens new avenues for sensing and quantum manipulation with levitated systems.
• The demonstrated techniques advance the field of optical trapping and manipulation.