Gerhard Ertl Lecture & Award

The control over electrical conductivity is critical key to enabling gallium oxide and related materials for high power electronic devices. Understanding the influence of dopants and defects onto the electrical and electronic properties is therefore of paramount importance [1]. Identifying defects and their local electronic properties remains a challenge. [more]

Collective states are key to understand properties of materials across different length scales. In my talk, I will give an overview of different functionalities that emerge from collective states, with prospects for vibrational spectroscopy and engineering material properties with light. [more]

Observing molecular dynamics experimentally with both, highest spatial and temporal resolution is one of the biggest challenges in chemistry and biochemistry. Understanding and resolving structure-dynamics relationships will help to further understand molecular function. Few experimental methods allow to resolve multi-scale dynamics and structural information in the same experiment. [more]

When working in the infrared (IR) or terahertz (THz) spectral ranges, traditional optical materials like gold and silver have extremely large and negative permittivities. This means it is difficult to use these materials for plasmonics or hyperbolic metamaterials, both of which require materials with relatively small and negative permittivities. We must therefore explore alternative materials. In this talk, I will focus on two classes of materials: heavily-doped III-V semiconductors for the IR and topological insulators for the THz. [more]

In this talk, I discuss our recent efforts in the context of nano-optics and photonics, with a special emphasis on strong light-matter interactions enabled by excitonic, phononic, electronic and magnonic material responses coupled to engineered metasurfaces. I will discuss our recent theoretical and experimental results in the context of polariton manipulation in these systems, the role of symmetries in their control, and their opportunities for technological advances. The combination of these features with photonic engineering enables giant optical nonlinearities, efficient nanoscale light manipulation and topological wave phenomena. During the talk, I will discuss the exotic light-matter interactions arising in these systems, and their opportunities for wave physics and photonics technologies. [more]