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Fakultät Physik
Lecture

Advanced Condensed Matter Physics – Magnetism and Superconductivity

Lecturer Prof. Dr. Zhe Wang
Language English
Module PHY7235
Course content The lecture covers the most important aspects on collective phenomena in modern condensed matter physics, particularly on magnetism and superconductivity, based on the basic knowledge of solid state physics and quantum mechanism. Besides the fundamental properties of magnetically ordered materials and superconductors, the lectures will also cover selected topics of the contemporary research.
Moodle link https://moodle.tu-dortmund.de/course/view.php?id=42189

Laboratory of condensed matter physics: Time-domain terahertz spectroscopy

Lecturer Dr. Ahmed Ghalgaoui
Language English
Module PHY7237
Course content Lecture
1. Introduction:
optical response functions, Maxwell equations in matter
2. Charge carrier transport:
2.1. Drude model
2.2. DC conductivity
2.3. AC conductivity
3. Terahertz technology
3.1. General introduction
3.2. Generation of sub-picosecond Terahertz pulses
3.2.1. Terahertz pulse generation by photoconductive switches
3.2.2. Terahertz pulse generation in gas plasma
3.2.3. Terahertz pulse generation by optical rectification
3.3. Time-resolved detection of Terahertz pulses: Photoconducting dipole antennas
and electro-optic sampling
4. Introduction to multidimensional Terahertz spectroscopy
4.1. Introduction to nonlinear optics
4.2. Liouville Pathway diagrams
4.3. Case of semiconductors
4.4. Case of liquid water
4.5. Case of magnetic materials

Exercise
The exercise session serves first as in depth hands-on introduction of the complex
experimental setup to the students. In particular, the students will have the chance to
see the different state-of the-art technique at work and how to use them to perform real
experiments in the laboratory. In addition, this session will be dedicated to show to the
student how to analyze the experimental data. At the end, the experimental part will
allow the students to:
• Understand the water vapor absorption lines in the terahertz regime using THz-TDS
spectroscopy.
• Measure the terahertz transmission of a Silicon substrate and find the thickness of
the substrate from the time domain signals.
• Determination of the complex refractive index of semiconductors (Silicon, GaAs,
Germanium, ...) and liquid solution (water, isopropanol, methanol, …)
Moodle link https://moodle.tu-dortmund.de/enrol/index.php?id=42190