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We are constantly looking for motivated Bachelor, Master and PhD students as well as PostDocs with interests in the theoretical and numerical analysis of light matter interaction in micro- and nanooptical systems. If you would like to join our group while working in the context of any of our research activities, please do not hesitate to contact us.

 

In particular we currently offer Bachelor theses on:

 

Master thesis on Designing photonic nanostructures with machine learning algorithms  

Machine learning algorithms promise to design photonic structures with properties on demand from a large amount of previously computed data. In machine learning approaches, the algorithm is first in a training phase that requires many simulations of the actual forward problem. Afterwards, the structures are optimised in a recall phase that does not require any forward simulations. 

It is the purpose of this master thesis apply machine learning algorithms to some selected design problems in our group in the context of self-assembled metamaterials. In the initial phase of the thesis an in-house code for the simulation of photonic clusters consisting of a larger number of spheres shall be used. In the cause of time, also other methods shall be used to tackle different scientific challenges. 

 

Contact for further information and application

Prof. Carsten Rockstuhl

 

 

Master thesis on Quantum state engineering in quantum nanophotonic platforms

The generation of quantum states of light and its reliable controllability are highly required to realize various quantum applications in the context of, e.g., quantum simulation, quantum computing, quantum cryptography, and quantum metrology. It is the purpose of this master thesis to develop a novel scheme that generates nonclassical state of light (e.g., single photon, squeezed state, or more specialized states) and manipulates its nonclassical properties in a well-controlled manner using different plasmonic platforms (e.g., metallic waveguides, nanoparticles, or metamaterials). The project exploits particular methods such as the driven-dissipative approach, the photon-catalysis, or nonlinearity-induced photon control. The master thesis is theoretical but shall be done in close collaboration with experimental partners that aim to implement our theoretical scheme. 

Contact for further information and application

Prof. Carsten Rockstuhl

Dr. Changhyoup Lee

 

Master thesis on Quantum nanophotonic sensing and imaging

Nonclassical properties (e.g., sub-Poissonian photon-number distribution or entanglement) of an input state of light enables a photonic sensor to achieve much higher sensitivity or more precise measurement well beyond the standard quantum limit. With the advancement of experimental nanophotonic technologies, the master project aims to successfully implement quantum metrological ideas in particular nanophotonic sensors, making use of both classical mode properties and quantum features of light. The student will develop novel sensing schemes that are feasible and robust to realistic losses in particular nanophotonic platforms, e.g., the surface plasmon resonance sensor— one of the most successful photonic sensor at the classical level. The master thesis is theoretical but shall be done in close collaboration with experimental partners that aim to implement our theoretical schemes. 

Contact for further information and application

Prof. Carsten Rockstuhl

Dr. Changhyoup Lee

 

Master thesis on Nanophotonic Perovskites

Metal halide perovskites have raised great interest due to their exceptional optoelectronic material properties, mainly driven by the unprecedented performance improvement of perovskite solar cells. The key material properties, which make perovskites an excellent photovoltaic material, have also stimulated interest in its application in light-emitting diodes and lasers. To increase the efficiency of perovskite optoelectronic devices, a nano-structuring of the perovskite devices is necessary. This can be done by, e.g. nanoimprint lithography (NIL). Besides 1D gratings for distributed feedback lasers, one can also think of two dimensional photonic crystals to enhance absorption in solar cells. This master thesis aims to texture perovskite materials to tune and gain new opto-electrical properties. The candidate will be able to directly start using an established NIL process to imprint different nanostructures into the active material. This thesis will combine experiments and simulations. Goals of this project are to build perovskite lasers and solar cells with enhanced absorption. We emphasise that the fabrication shall be done in the group of U. Paetzold at LTI/IMT whereas simulations shall be done in our group. The master thesis will be jointly supervised.

Contact for further information and application

Prof. Carsten Rockstuhl

Dr. Ulrich Paetzold

 

Bachelor thesis on The Abraham-Minkowski splitting problem

More than hundred years ago, Max Abraham and Hermann Minkowski initiated a dispute concerning the correct definition for the momentum of an electromagnetic wave in matter. Recently, the controversy dissolved by appreciating that not only the electromagnetic wave, but the combined system of wave and matter needs to be considered. Indeed, the Abraham-Minkowski controversy is rather a splitting problem for the energy and momentum between the matter and the wave part that can be done differently. Nevertheless, multiple questions remain in this context and our Bachelor thesis shall explore one or two of them. For example, we are interested in the description of momentum in a bi-isotropic medium or the question in which of the possible formulations the helicity of the wave is preserved for a dual medium. The work is theoretically challenging and requires a solid background and interest in electrodynamics.

Contact for further information and application

Prof. Carsten Rockstuhl

MSc. Stefan Nanz