Strong light-matter coupling: from traditional to cavity-free polaritons
Licentiate thesis, 2021
The first part of the thesis is devoted to traditional polaritons in a microcavity-plasmon coupling platform. The versatility of the platform allows to achieve strong and ultrastrong coupling at room temperature. The second part is dedicated to cavity-free or self-hybridized polaritons. Here it is shown that polaritons can be sustained by the material with the transition resonance itself, by reshaping it into simple structures as slabs, cylinders, and spheres. The structures reveal a minimal critical size for polaritons to exist. Moreover, the coupling strength seems to be limited only by the macroscopic optical properties of the material.
These results can guide the community to quickly realize which materials can be used to form polaritons and to find them in simpler structures. Since the structures are not restricted by an external cavity, a window of opportunity is open for applications and further studies on the impact of polaritons on material properties.
Adriana Canales Ramos
Chalmers, Physics, Nano and Biophysics
Abundance of cavity-free polaritonic states in resonant materials and nanostructures
Journal of Chemical Physics,; Vol. 154(2021)
Stark plasmon-exciton koppling för effektiva foton-foton interaktioner
Swedish Research Council (VR) (2017-04545), 2018-01-01 -- 2021-12-31.
Areas of Advance
Nanoscience and Nanotechnology
Atom and Molecular Physics and Optics
Other Physics Topics
Other Materials Engineering
Chalmers Materials Analysis Laboratory
PJ, seminarierum, Fysikgården 2B, Chalmers University of Technology
Opponent: Witlef Wieczorek, Chalmers University of Technology, Sweden