The "Terahertz Physics of Quantum Materials" research group investigates phenomena at extremely high frequencies in the so-called terahertz (THz) range of about 1 to 30 THz. This relatively unexplored frequency window overlaps with numerous elementary processes in condensed matter, such as lattice vibrations (phonons), spin waves (magnons), and the scattering of conduction electrons (momentum relaxation).
To decode and even control the dynamics and coupling of these processes, we develop sensitive optical methods based on ultrashort electromagnetic fields in the THz range and optical laser pulses, combining these with near-field methods for improved spatial resolution. To better understand our results, we develop simple theoretical models.
The insights gained are relevant for applications. For instance, bit rates and bandwidths in information technology are continuously approaching the THz range (e.g., in wireless networks and field-effect transistors). On the other hand, we utilize our findings directly for applications in THz photonics, e.g., for the construction of novel emitters, detectors, and modulators of THz radiation.

More information can be found at: http://www.physik.fu-berlin.de/en/einrichtungen/ag/ag-kampfrath.
 
Job description:
The goal of this project is to specifically trigger dynamic changes of magnetic order and electron spin transport in spintronic nanostructures using ultrashort laser pulses, and to measure, understand, and ultimately control the resulting ultrafast dynamics with spatial resolution. This approach, paired with simple models, will provide new insights into the functioning of fundamental spintronic effects.

This project is part of the DFG Collaborative Research Center TRR227, Project A05.
 
Requirements:
Completed university degree (Master’s) in Physics.
 
Desirable:
Experience in at least one of the following fields: Optics, solid-state physics, magnetism, spintronics, microscopy techniques with resolution in the nanometer range.
 
• Team spirit, perseverance, and enthusiasm for new ideas and topics.
• Very good command of English.
• Master’s thesis in Physics with excellent grades.
• Knowledge/experience in solid-state physics, magnetism, optics, spintronics, or microscopy techniques with resolution in the nanometer range.

For further information, please contact Dr. Tom S. Seifert (tom.seifert@fu-berlin.de).