Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 39: Focus Session: Phonon Polaritons: Opportunities for THz Nanooptics II

O 39.5: Talk

Tuesday, March 13, 2018, 15:00–15:15, HE 101

Nonlinear nanophotonics with localised phonon polaritons — •Simone De Liberato and Christopher Gubbin — School of Physics and Astronomy, University of Southampton, Southampton, UK

Phonon polaritons localised in nanometric resonators are a promising platform to develop polaritonic applications in the terahertz and mid-infrared regions. This is due to their extremely small mode volumes, long lifetimes, and large nonlinearities; as well as the relative ease with which nanoresonators with features at the 100nm scale, are fabricated.

In this talk I will present our recent results in this field. I will start with the experimental demonstration of strong coupling between localised and propagative phonon polariton modes in SiC nanopillar arrays [1]. I will then review a series of theoretical works in which, by investigating nonlinear properties of localised phonon polaritons, we demonstrate the possibility to exploit them to empower a novel generation of terahertz and mid-infrared devices [2-4].

[1] C. R. Gubbin, F. Martini, A. Politi, S. A. Maier, and S. De Liberato, Phys. Rev. Lett. 116, 246402 (2016)

[2] C. R. Gubbin, S. A. Maier, and S. De Liberato, Phys. Rev. B 95, 035313 (2017)

[3] C. R. Gubbin and S. De Liberato, ACS Phot. 4, 1381 (2017)

[4] C. R. Gubbin and S. De Liberato, ACS Phot. 10.1021/acsphotonics.7b00863 (2017)