3 years ago

Nonlinear Raman Effects Enhanced by Surface Plasmon Excitation in Planar Refractory Nanoantennas

Nonlinear Raman Effects Enhanced by Surface Plasmon Excitation in Planar Refractory Nanoantennas
Anton V. Kharitonov, Semion K. Saikin, Sergei G. Kazarian, Alexander M. Alekseev, Sergey S. Kharintsev
We consider a nonlinear mechanism of localized light inelastic scattering within nanopatterned plasmonic and Raman-active titanium nitride (TiN) thin films exposed to continuous-wave (cw) modest-power laser light. Owing to the strong third-order nonlinear interaction between optically excited broadband surface plasmons and localized Stokes and anti-Stokes waves, both stimulated and inverse Raman effects can be observed. We provide experimental evidence for coherent amplification of the localized Raman signals using a planar square-shaped refractory antenna.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b02252

DOI: 10.1021/acs.nanolett.7b02252

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