Enhancement of inherent Raman scattering in dielectric nanostructures with electric and magnetic Mie resonances

Abstract

Resonantly enhanced Raman scattering in dielectric nanostructures has been recently proven to be an effcient tool for developing nanothermometry and experimental determination of their mode- composition. In this paper, we develop a rigorous analytical theory based on the Green's function approach to calculate the Raman emission from crystalline high-index dielectric nanoparticles. As an example, we consider silicon nanoparticles which have a strong Raman response due to active optical phonon modes. We relate enhancement of Raman signal emission to Purcell effect due to the excitation of Mie modes inside the nanoparticles. We also employ the numerical approach to the calculation of inelastic Raman emission in more sophisticated geometries, which do not allow a straightforward analytical form of the Green's function description. The Raman response from a silicon nanodisk has been analyzed within the proposed method, and the contribution of the various Mie modes has been revealed.

References in corpus (6)

• Magnetic light
• On-a-chip biosensing based on all-dielectric nanoresonators
• Resonant Raman Scattering from Silicon Nanoparticles Enhanced by Magnetic Response
• Purcell factor of Mie resonators featuring electric and magnetic modes
• Enhancement and Inhibition of Spontaneous Photon Emission by Resonant Silicon Nanoantennas
• Dielectric nanoantenna as an efficient and ultracompact demultiplexer for surface waves

Cited by in corpus (7)

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• Symmetry analysis and multipole classification of eigenmodes in electromagnetic resonators for engineering their optical properties
• Novel approach to Raman spectra of nanoparticles
• Directional emission of down-converted photons from a dielectric nano-resonator
• Raman spectra of nanoparticles: elasticity theory-like approach for optical phonons
• Revealing Low-Radiative Modes of Nanoresonators with Internal Raman Scattering
• Using optical resonances to control heat generation and propagation in silicon nanostructures