Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Nano-Optics III

Q 27.7: Talk

Tuesday, March 7, 2017, 16:00–16:15, P 11

Strong coupling between surface plasmon polaritons and molecular vibrations — •Hala Memmi, Sascha Kalusniak, Sergey Sadofev, and Oliver Benson — Institut für Physik, Humboldt Universität zu Berlin

The hybridization of different quasi-particles is an extensively studied subject; both from a practical as well as fundamental point of view. The resultant hybrid excitations exhibit new properties that are not available by the isolated constituents.

Here, we report on hybridization of surface plasmon polaritons and molecular vibrations in an organic/inorganic plasmonic hybrid structure. The structure consists of a poly-vinyl-methyl-ketone layer deposited on top of a silver layer. Attenuated-total-reflection measurements allow us to reconstruct the dispersion relation of the hybrid. The system exhibits two polariton branches clearly demonstrating anti-crossing behavior in vicinity of the carbonyl stretching vibration of the polymer with the coupling strength of 14 meV. Systematic tuning of the carbonyl group density confirms the square root dependence of the energy splitting. We also present some of the characteristics of this hybrid species and discuss its potential applications.