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Tunable, anomalous Mie scattering using spatial coherence.

Yangyundou Wang, Hugo F Schouten, Taco D Visser

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Summary

This summary is machine-generated.

Researchers show that a J0-Bessel-correlated beam hitting a sphere creates unusual scattering, with the peak moving away from the forward direction. Adjusting spatial coherence controls this scattering direction, offering new ways to steer light.

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Area of Science:

Optics and Photonics
Electromagnetism
Scattering Theory

Background:

Light scattering from homogeneous spheres is typically forward-directed.
Controlling the directionality of scattered light is crucial for applications in optical sensing and communication.

Purpose of the Study:

To investigate the scattering properties of a J0-Bessel-correlated beam incident on a homogeneous sphere.
To explore methods for controlling the directionality of light scattering.

Main Methods:

Generation of a J0-Bessel-correlated beam using a spatially incoherent, annular source.
Theoretical analysis and simulation of the scattered field distribution from a homogeneous sphere.
Systematic variation of the spatial coherence length of the incident beam.

Main Results:

The J0-Bessel-correlated beam produces an unusual scattering distribution where the maximum is not in the forward direction.
The direction of maximal scattering can be precisely controlled by adjusting the spatial coherence length of the beam.
The total scattered power remains constant irrespective of the scattering directionality.

Conclusions:

J0-Bessel-correlated beams offer a novel mechanism for manipulating light scattering directionality.
This control over scattering can be leveraged to steer light away from the forward direction.
The findings enable selective addressing of detectors at various angles, enhancing optical system design.