The double-resonance enhancement of stimulated low-frequency Raman scattering in silver-capped nanodiamonds
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-01-01 |
| Journal | AIP conference proceedings |
| Authors | A. N. Baranov, A. V. Butsen, Š. Š. ŠŠ¾Š½ŠøŠ½, A. K. Ivanova, Aleksandr A. Kuchmizhak |
| Institutions | National Research Nuclear University MEPhI, Russian Academy of Sciences |
| Citations | 1 |
Abstract
Section titled āAbstractāHybrid plasmonic-dielectric nano- and (sub)microparticles exhibit magnetic and electrical dipolar Mie-resonances, which makes them useful as efficient basic elements in surface-enhanced spectroscopy, non-linear light conversion and nanoscale light control. We report the stimulated low-frequency Raman scattering (SLFRS) of a nanosecond ruby laser radiation (central wavelength Ī» = 694.3 nm (full-width at half-maximum ā 0.015 cmā1), gaussian 1/e-intensity pulsewidth Ļ ā 20 ns, TEM00-mode pulse energy Emax ā 0.3 J) in nanodiamond (R ā 120 nm) hydrosols, induced via optomechanical coherent excitation of fundamental breathing eigen-modes, and the two-fold enhancement of SLFRS in Ag-decorated nanodiamonds, characterized by hybrid dipolar resonances of electrical (silver) and magnetic (diamond) nature. Hybrid metal-dielectric particles were prepared by means of nanosecond IR-laser ablation of solid silver target in diamond hydrosols with consecutive Ag-capping of diamonds, and were characterized by scanning electron microscopy, UV-vis, photoluminescence and energy-dispersive X-ray spectroscopy. Intensities of the SLFR-scattered components and their size-dependent spectral shifts were measured in the highly sensitive stimulated scattering regime, indicating the high (ā 30%) SLFRS conversion efficiency and the resonant character of the scattering species.