PhD: Ultrafast imaging on ferroic materials

In the Laboratory for Multifunctional Ferroic Materials we investigate materials where strong coupling between electrons leads to novel types of ordering processes of their spins and charges. Our scope is to study the fundamental physics of these materials with a focus on experimental basic research, yet including the perspective on the theoretical background and on technological relevance. Our experimental core technology is pulsed-laser spectroscopy between Terahertz and ultraviolet frequencies. In addition, we apply atomic force microscopy, standard magnetic and dielectric characterization methods, Monte-Carlo simulation, and pulsed-laser-deposition of oxide thin films. The PhD project aims at combining our internationally leading expertise in (non-)linear imaging of microscale ferroic structures with the high temporal resolution of optical pump-probe schemes. A key objective will be the investigation of dynamics in ferroic and/or phase-change materials with femtosecond temporal and micrometer spatial resolution. Candidates will explore how tailored optical, electrical, or magnetic excitations can be harnessed to actively manipulate ferroic states of matter and their domain structure far from thermal equilibrium. To this end, they will design and realize their own time-resolved imaging setup. In this, lasers are not just a tool, but part of the setup where candidates have no reservations to carry out basic adjustments or maintenance. They will also learn to work with cryogenic environments. They are never afraid to tear everything down and try a new approach, should this become necessary. Despite the focus on laser-optical experiments, the involvement of other experimental techniques and in-depth discussion with theoretical groups are likely requirements. For further details and application see: ferroic.mat.ethz.ch