Resonant Raman Scattering from Silicon Nanoparticles Enhanced by Magnetic Response

Abstract

Enhancement of optical response with high-index dielectric nanoparticles is attributed to the excitation of their Mie-type magnetic and electric resonances. Here we study Raman scattering from crystalline silicon nanoparticles and reveal that magnetic dipole modes have much stronger effect on the scattering than electric modes of the same order. We demonstrate experimentally a 140-fold enhancement of Raman signal from individual silicon spherical nanoparticles at the magnetic dipole resonance. Our results confirm the importance of the optically-induced magnetic response of subwavelength dielectric nanoparticles for enhancing light-matter interactions.

References in corpus (5)

• High-efficiency light-wave control with all-dielectric optical Huygens' metasurfaces
• Directional visible light scattering by silicon nanoparticles
• Magnetic light
• Purcell factor of Mie resonators featuring electric and magnetic modes
• Laser fabrication of crystalline silicon nanoresonators from an amorphous film for low-loss all-dielectric nanophotonics

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