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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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Plasmonic cloaking for irregular objects with anisotropic scattering properties.

S Tricarico¹, F Bilotti, A Alù

¹Department of Applied Electronics, University Roma Tre, Via della Vasca Navale, 84-00146 Rome, Italy.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|April 7, 2010

Summary

This study extends plasmonic cloaking to irregular objects, demonstrating effective scattering reduction for complex shapes. The technique ensures uniform cloaking performance regardless of object orientation or illumination conditions.

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Area of Science:

Metamaterials and Nanophotonics
Electromagnetism and Optics

Background:

Plasmonic cloaking, based on scattering cancellation, has primarily been applied to simple, symmetrical objects.
Doubts exist regarding its efficacy for complex, anisotropic, and non-canonical geometries.

Purpose of the Study:

To extend plasmonic cloaking to irregularly shaped objects with anisotropic scattering properties.
To demonstrate significant and uniform scattering reduction for non-canonical geometries.

Main Methods:

Investigating the volumetric scattering cancellation effect in plasmonic media.
Analyzing cloak design rules for irregular obstacles.

Main Results:

Achieved significant scattering reduction for irregular geometries, independent of illumination angle, position, and polarization.

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Demonstrated the effectiveness of plasmonic cloaking for objects with anisotropic scattering responses.

Conclusions:

Plasmonic cloaking is effective for irregular objects, overcoming limitations of previous methods.
Proper cloak design enables uniform scattering suppression for complex shapes and varying illumination conditions.