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Broadband directional scattering through a phase difference acquired in composite nanoparticles.

T P S Kotte, A J L Adam, T Zuidwijk

|November 29, 2023

Summary

Composite nanoparticles exhibit broadband directional light scattering due to phase differences between constituent materials. This phenomenon was confirmed through analytical methods, finite element method (FEM) simulations, and experimental validation using ion-beam etched nanoparticles.

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Area of Science:

Nanophotonics
Materials Science
Computational Physics

Background:

Composite nanoparticles offer tunable optical properties.
Understanding light scattering is crucial for designing advanced optical materials.

Purpose of the Study:

Investigate broadband directional light scattering in composite nanoparticles.
Elucidate the physical mechanisms behind this scattering behavior.
Validate theoretical predictions with experimental results.

Main Methods:

Born approximation for analytical calculations.
Finite Element Method (FEM) simulations.
Experimental fabrication using ion-beam etching.
Optical scattering measurements.

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Main Results:

Composite nanoparticles demonstrate broadband directional scattering.
Directional scattering originates from the phase difference between fields scattered by the two constituent materials.
Experimental measurements corroborate simulation and theoretical predictions.

Conclusions:

The phase difference in scattered fields is the primary cause of directional scattering in these composite nanoparticles.
This study validates a combined theoretical, computational, and experimental approach for analyzing nanoparticle optics.
The findings pave the way for designing novel composite nanoparticles with tailored scattering properties.