Teaser: 2D materials are fascinating novel solid-state systems that are surprisingly easy to produce and readily integrated with other systems. We will show you how to exfoliate  2D materials such as Molybdenite from bulk crystals and identify individual flakes using optical microscopy. You will also learn how to transfer these materials onto a pre-determined spot on a substrate.
 

Bedingungen/Remarks:

- Max Teilnehmerzahl: 3 Personen

- Training geht über beide Tage

Supervised by: vermutlich Michael Kempf
- duration of the session [min]: volle verfügbare Zeit in den Slots Dienstag und Mittwoch (geht für die Teilnehmer über beide Tage)
- safety instruction needed: nein
- location: Raum 036

Photoluminescence and Raman spectroscopy are powerful tools to analyze the properties of solid-state systems. In combination with microscopy, they provide a means to map structures on micron length scales. You will learn how these techniques work, using various 2D materials as test samples. Potentially, other samples provided by participants may be studied as well.

Bedingungen/Remarks:

- Max. Teilnehmerzahl: 3 Personen
- Training kann an einem einzelnen Tag durchgeführt werden, bei Bedarf können also 2x 3 Personen teilnehmen

- supervised by: vermutlich Tobias Korn
- duration of the session [min]: volle verfügbare Zeit der jeweiligen Slots
- safety instruction needed: ja (Nutzung Laser)
- location: Raum U15 und/oder 039

In this tutorial we will explore possibilities to highlight LiMatI research to the public. Based on results of a given PhD obtained in one of the LiMatI projects (yet to find) we will discuss possibilities to distribute the science to an audience being present at e.g. Lange Nacht der Wissenschaften.

Remarks: no restriction/aiming for 6(-10) people

- seminar room
- 2 Days
- no safety instruction needed
- with regard to the advised target group the tutorial will be held in german

Supervised by: Roman Gruchow, Norman Iwe, Josef Tiggesbäumker

Students learn how to operate and align a tunable light source (NOPAs), which allow to generate femtosecond pulses in the visible (440nm-750nm). After generation the pulses are temporally compressed by a prism compressor resulting in pulse durations of app 30 fs, which is proven by an autocorrelation measurement.    
 

Supervised by: Steffen Wolter

- maximum number of participants per session: 4 people (can be extended to 6 people if necessary)
- duration of the session [min]: 120 min but we can offer both days the same tutorial
- safety instruction needed: yes: laser safety
- location: lab U21 in Forschungsbau
- special conditions / restrictions: none

This tutorial serves as a hands-on introduction to laser-written systems of photonic waveguides. After a brief primer on waveguides and the fundamentals of discrete diffraction, we will experimentally characterize the propagation dynamics of light in a number of one- and two-dimensional waveguide arrangements including directional couplers, homogeneous chains, “photonic graphene” and topological Kagome lattices.

Supervised by:Julius Beck, Matthias Heinrich
Maximum number of participants per session: 5Duration of the session [min] and over 1 or 2 days:
1 day, 2 sessions:
nicht genügend Interessenten: Mittwoch Ausfall
Safety instruction needed: Laser safety
Location: SR 183, mit Beamer/Smartboard – das Setup ist portabel
Special conditions / restrictions: N/A

Halide perovskites are among the most promising nanomaterials for applications in photovoltaics and light-emitting devices. We will demonstrate their (easy) synthesis, ion exchange, purification procedure for the samples, crystal phase identification by XRD, absorption and (time-resolved) fluorescence spectroscopy. These are the first steps to
investigate their intriguing optical and electronic properties. Research questions relate to the ruling optoelectronic mechanisms and their stability.

Supervised by: Dr. Sushant Ghimire
Maximum number of participants per session: 6
Duration of the session [min] and over 1 or 2 days:
The synthesis will be performed during the first day (2 hours) and the characterization during the second day (2 hours).
Safety instruction needed: Keep calm, don't touch anything if not advised and carry lab coat and safty goggles.

Force microscopy increasingly is an indispensable tool for the characterization (often quality control) of your samples. Structure and heights can be assessed with nanometric resolution. The method is very versatile and offers a number of functional information channels such as material contrast, stability, electric charge/surface potential, manipulation, a.m.m. The training shall serve to provide an access to the method, and discuss its possible benefits with regard to your LiMatI research question.

Supervised by: Lukas Böttcher, Physics of Surfaces and Interfaces
- Maximum number of participants per session: 4
- Duration of the session [min] and over 1 or 2 days: e.g. 1 x 4h
- Safety instruction needed: not necessarily
- Location: U035
- Special conditions / restrictions: cannot take place in parallel with "Scanning electron microscopy of nanostructures" (same lab)

Scanning electron microscopy is increasingly is an indispensable tool for the characterization (often quality control) of your samples. Structure and material composition can be assessed with nanometric resolution. The method operates in vacuum, according to the specimen the primary energy and the angle is to be adjusted. The training gives insight in how to prepare a sample, focus the beam and understand the images. The training shall serve to provide an access to the method, and discuss its possible benefit with regard to your LiMatI research question.

Supervised by: Mirco Wendt, Physics of Surfaces and Interfaces
- Maximum number of participants per session: 3
- Duration of the session [min] and over 1 or 2 days: for instance 1 x 4h
- Safety instruction needed: not necessarily
- Location: U035
- Special conditions / restrictions: cannot take place in parallel with "Scanning force microscopy of nanostructures" (same lab)

The simulation of non-perturbative quantum dynamics in laser fields requires the solution of the time-dependent Schrödinger equation (TDSE) in one way or another.  We will solve the one-dimensional TDSE directly in position space using the Crank-Nicolson method. We will use Python to implement our TDSE solver. As an example, we apply our TDSE solver to the simulation of high-harmonic generation.

Supervised by: Dieter Bauer

- Maximum number of participants: Flexible
- Duration of the session [min] and over 1 or 2 days: Only on Tuesday, 2h
-safety instruction needed: No
- location: Seminar room 1 (or lecture hall 1 in case of too many participants)
- special conditions / restrictions: Bring your own laptop with Python installed (we recommend the free Anaconda distribution, which includes many useful applications such as the Spyder development environment for Python and Jupyter Notebooks)

Modeling the time-dependent linear or nonlinear response of materials to electromagnetic radiation requires the solution of Maxwell’s equations. Here, we will implement the Finite-Differences-Time-Domain (FDTD) Method to solve these equations in one dimension and apply our knowledge to simulate the impact of a short laser pulse on a multilayered dielectric mirror (aka Bragg mirror).

Supervised by: Christian Peltz

- Maximum number of participants: Flexible
- Duration of the session [min] and over 1 or 2 days: Only on Wednesday, 2h
- safety instruction needed: No
- location: Seminar room 1 (or lecture hall 1 in case of too many participants)
- special conditions / restrictions: Bring your own laptop with Python installed (we recommend the free Anaconda distribution, which includes many useful applications such as the Spyder development environment for Python and Jupyter Notebooks)