Power spectral density of SiN3 membrane
The thermally driven fluctuations of a suspended membrane define a time-continuous stationary signal. In this project, a compact setup will be developed to measure the position fluctuations of the membrane and to record its power spectral density (PSD).
High photoluminescence quantum yield in 2D materials
Transition metal dichalcogenides (TMDs) are a group of layered materials. In their monolayer form they have a direct bandgap [1]. This allows to obtain a sizable coupling of light to the material. Here, the goal is to extend measurements to other TMD monolayers as well as to hexagonal boron nitride
Development of a reflection-type near-field optical microscope
In this project a reflection-type near-field optical microscope will be designed, developed and characterized.
Automated nanoparticle loading
Levitation optomechanics systems consist of a nanoparticle that is optically trapped and levitated by a focused laser beam under vacuum conditions. The aim of this project is to design and build a reliable and automated nanoparticle loading process that can be triggered remotely.
Automated identification of two-dimensional crystals based on optical contrast difference
The goal of this project is to develop an automated setup that is able to identify flakes of different thicknesses on Si/SiO2 substrates by analyzing the difference in optical contrast between the crystals and the substrate.
Optical trapping and cooling at telecom wavelengths
The goal of this master project is to set up an optical trap for a dielectric nanoparticle at telecom wavelengths and evaluate its performance for feedback cooling in comparison to existing experiments at 1064 nm.
Optimal State Estimation of a Levitated Nanoparticle
In this project, a Kalman filter will be implemented to estimate the time-varying state of a nanoparticle held in the focus of a laser beam. The state of the particle will then be used in a feedback loop to act back on the particle and to provide ultimate control over the nanoparticle's dynamics.
Optoelectronics with two-dimensional atomic crystals
For device applications, it is desirable to create functional hetero-structures by stacking two-dimensional atomic crystals on top of each other, forming so-called Van der Waals (VdW) heterostructures. We study the fabrication and properties of such optoelectronic devices based on 2D materials.
Self-induced back action trapping
Self-induced backaction (SIBA) trapping is a concept developed in optics for trapping of polarizable particles [1,2]. The goal of this project is the analyze, design and characterize an electromechanical analog of SIBA trapping.

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