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Electromagnetic scattering by spherical negative-refractive-index particles: Low-frequency resonance and localization
Zheng Liu1, Zhifang Lin, S T Chui
1Surface Physics Laboratory and Research Center of Theoretical Physics, Fudan University, Shanghai 200433, China.
Summary
Negative-refractive-index particles exhibit unusual Mie scattering resonances near zero size. This phenomenon reduces light localization, potentially enabling light localization transitions by adjusting wave vectors.
Area of Science:
- Physics
- Optics
- Materials Science
Background:
- Mie scattering describes light interaction with particles.
- Negative-refractive-index materials exhibit unique electromagnetic properties.
- Light localization is a phenomenon where light waves become trapped.
Purpose of the Study:
- To investigate the Mie scattering of electromagnetic waves by spherical negative-refractive-index particles.
- To analyze the unusual resonance behavior at ka-->0.
- To explore the implications for light localization in media composed of these particles.
Main Methods:
- Theoretical analysis of Mie scattering equations.
- Examination of scattering properties for negative-refractive-index particles.
- Modeling of light propagation in disordered media.
Main Results:
- An unusual Mie scattering resonance was observed at ka-->0 for negative-refractive-index particles.
- This resonance is size-insensitive, differing from positive-refractive-index particle resonances.
- A significant reduction in the localization parameter was found for media with these particles.
Conclusions:
- The ka-->0 resonance in negative-refractive-index particles offers a novel pathway to control light localization.
- Reducing the wave vector k can lead to light localization transitions, analogous to electronic systems.
- This research opens possibilities for manipulating light propagation in metamaterials.