Probing coherence Stokes parameters of three-component light with nanoscatterers

Area of Science:

• Optics and Photonics
• Nanotechnology
• Quantum Optics

Background:

• Characterizing the coherence properties of optical fields is crucial for understanding light-matter interactions.
• Current nanoprobe techniques are limited in their ability to fully determine the spatial coherence of complex light fields.

Purpose of the Study:

• To establish a novel method for determining the spectral coherence Stokes parameters of a random three-component optical field.
• To extend the capabilities of nanoprobe techniques for analyzing light with arbitrary three-dimensional polarization structures.

Main Methods:

• Utilizing scattering from two dipolar nanoparticles to probe the optical field.
• Measuring intensity and polarization-state fringes of the scattered far field in three distinct directions.

Main Results:

• Successfully demonstrated the construction of all nine coherence Stokes parameters at the dipole locations.
• Validated the method's ability to analyze random three-component optical fields.

Conclusions:

• The developed method provides a comprehensive approach to characterizing spectral coherence Stokes parameters.
• This technique significantly advances the detection of spatial coherence in complex, three-dimensional polarized light fields.