Hybrid nanolayer architectures for ultrafast acousto plasmonics in soft matter The goal of the presented work is to explore the interaction between gold nanorods (GNRs) and hyper sound waves. For the generation of the hyper sound I have used Azobenzene containing polymer transducers. Multilayer polymer structures with well defined thicknesses and smooth interfaces were built via layer by layer deposition. Anionic polyelectrolytes with Azobenzene side groups (PAzo) were alternated with cationic polymer PAH for the creation of transducer films. PSS PAH multilayer were built for spacer layers which do not absorb in the visible light range. The properties of the PAzo PAH film as a transducer are carefully characterized by static and transient optical spectroscopy. The optical and mechanical properties of the transducer are studied on the picosecond time scale. In particular the relative change of the refractive index of the photo excited and expanded PAH PAzo is Δn n = 2.6*10‐4. Calibration of the generated strain is performed by ultrafast X ray diffraction calibrated the strain in a Mica substrate into which t…