Light-matter coupling

Main researchers: Jennifer Fowlie, Lukas Korosec, Giacomo Mazza

Light-matter coupling is a rapidly growing field encompassing all coupling between photonic modes and excitation modes of matter. In solid-state cavities, the light-matter interaction can be used to modify the nature of elementary excitations of matter via the formation of hybrid excitations of light and matter generically called polaritons [1]. Such an interaction is actively investigated in many areas such as in surface-plasmon resonators [2], excitonic transitions in semiconductors [3], metamaterials [4] and superconducting layers [5].

In our group we are looking at strong and ultrastrong light-matter coupling effects in solids both from a theoretical and an experimental perspective. In particular we are studying these effects in complex oxide cavities where there may be the possibility to induce changes in some macroscopic properties.

Light-Matter Coupling
Some sketched examples of cavity designs within oxide heterostructures where the blue denotes the functional layer, the orange a filler layer and the grey a metallic layer. Different types of light-matter coupling can be achieved in each.

[1]. C. Weisbuch et al, Phys. Rev. Lett. 69, (1992)

[2]. J. Bellessa et al, Phys. Rev. Lett. 93, (2004)

[3]. K. Hennessy et al, Nature 445, (2007)

[4]. A. Bayer et al, Nano Lett. 17, (2017)

[5]. Y. Laplace et al, Phys. Rev. B 93, (2016)