Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 31: Plasmonics & Nanooptics II: SHG and Dielectric Properties (joint session O/CPP)

O 31.2: Vortrag

Dienstag, 2. April 2019, 14:15–14:30, H8

Nonlinear Response of Grating-Coupled Surface Phonon Polaritons — Marcel Kohlmann, Nikolai Christian Passler, Martin Wolf, and •Alexander Paarmann — Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany

Surface Phonon Polaritons (SPhPs) have recently attracted much attention in infrared nanophotonics, due to their low losses compared to plasmon polaritons. Specifically for nonlinear optics, SPhPs result in tremendous enhancement of local optical fields [1,2]. Here, we study the nonlinear response of grating-coupled SPhPs [3] in by means of second-harmonic generation (SHG), in sub-wavelength SiC grating geometries. Non-specular emission of SHG is observed for resonant SPhP excitation, demonstrating the peculiarities of nonlinear scattering for grating-coupled nonlinear nanophotonics [4].

[1] Razdolski et al., Nano Letters 16, 6954 (2016).

[2] Passler et al., ACS Photonics 4, 1048 (2017).

[3] Greffet et al., Nature 416, 61 (2002).

[4] Quail and Simon, J. Opt. Soc. Am. B 5, 325 (1988).