Freie Universität Berlin
Fachbereich Physik - Institut für Experimentalphysik AG Kampfrath, Terahertz Physics Group
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
Research assistant (praedoc) (m/f/d)
with 75% part-time job
limited to 31.12.2029
salary grade (Entgeltgruppe) 13 TV-L FU
reference code: TRR_A05_Seifert_2026
Tasks
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
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.
How to apply
For further information, please contact Dr. Tom S. Seifert (tom.seifert@fu-berlin.de).
Applications should be sent by e-mail, together with significant documents, indicating the
reference code, no later than January 05th, 2026 in PDF format (preferably as one
document) to Dr. Tobias Kampfrath: b.selke-foelster@fu-berlin.de (Secretariat) or postal to
Freie Universität Berlin
Fachbereich Physik
Institut für Experimentalphysik
AG Kampfrath, Terahertz Physics Group
Dr. Tom S. Seifert
Arnimallee 14
14195 Berlin (Dahlem)
With an electronic application, you acknowledge that FU Berlin saves and processes your
data. FU Berlin cannot guarantee the security of your personal data if you send your
application over an unencrypted connection.
Freie Universität Berlin is an equal opportunity employer.
Facts
| Published | 17.12.2025 |
|---|---|
| Category | Research assistant |
| Location | Germany, Berlin, Berlin |
| Area of responsibility | Natural sciences, Academia and research, Research (academic), Physics |
| Start date (earliest) | Earliest possible |
| Duration | limited to 31.12.2029 |
| Full/Part-time | with 75% part-time job |
| Remuneration | salary grade (Entgeltgruppe) 13 TV-L FU |
| Working language and expected level |
|
| Homepage | https://www.fu-berlin.de/ |
Requirements
| Qualification | Completed university degree (Master’s) in Physics. |
|---|---|
| Field of study | Natural sciences and mathematics, Physics |
Contact
| Reference number | TRR_A05_Seifert_2026 |
|---|---|
| Contact person | Herr Dr. Tom S. Seifert |
Apply
| Application deadline | 05.01.2026 |
|---|---|
| Reference number | TRR_A05_Seifert_2026 |
| By email | b.selke-foelster@fu-berlin.de |