Saeed Nazemosadat Arsanjani

Photonic Integrated Circuits (PICs) for LiDAR application

I was involved in three different projects: • Design of an LED source setup for reliability testing of LiDAR receiving units • Characterization and functional measurements (temperature influence) of optoelectronic components (Lasers and detectors) • Optical testing of LiDAR sensors

I did a 6-month master’s thesis at the LiDAR department of Bosch. Investigating a practical and real-life business topic made that period an invaluable experience for me. Also, for my thesis, I had to work with other employees, where I learnt how to work in a team and collaborate with other members. • Optical ray tracing simulation with OpticStudio (Zemax) • Experimental implementation and alignment of optical setups • Optical components selection • Beam characterization and data evaluation • Cross-checking the measured beam profiles with simulation

Graphene has attracted widespread interest over the past decades due to its exceptional electrical, optical, and mechanical properties. Nevertheless, the characteristics of the graphene family materials are not completely understood yet; thus, further studies are ongoing to find more about the material. The current project examines the influence of various parameters on graphene nanoribbons' (GNRs) optical properties. This study discusses the impact of factors such as Fermi energy, nanoribbon width, and scattering rate on the GNR's localized surface plasmon (LSP) frequency. Moreover, a finite-difference time-domain (FDTD) code within the open-source software package Meep for calculating the GNR absorption has been developed, which can be used in further research.

One of the most critical factors to evaluate the quality of the laser mediums is a material gain that indicates the medium's light amplification ability. To measure the gain of a perovskite sample, the variable stripe length (VSL) technique is one of the most valuable and simplest ways. In this project, I focused on building a VSL set-up to be able to observe an amplified spontaneous emission (ASE).

Optical frequency combs and their applications in spectroscopy and distance measurements (time of flight and interferometric methods)

In this project, we built a setup that allows studying the laser modification threshold of optical materials. By exposing the samples to a He-Ne laser system, we investigate their modification under different exposure times. We found experimentally that increasing the exposure time leads to an improved modification, resulting in better detection contrasts.

Modeling and optimizing the absorption of the perovskite-silicon tandem solar cells by COMSOL Multiphysics and MATLAB (Genetic Algorithm)

Investigating the sensitivity of a PEDOT:PSS sensor with doped tin oxide nanoparticles to carbon monoxide (CO) under different conditions of humidity, CO gas flow rate, and gas pressure

Focus Areas: Optical systems, Computational photonics

Focus Areas: Optical systems, Computational photonics

Erasmus Mundus Joint Master Degree EuroPhotonics, The Europhotonics master's has been funded by the European Agency in the Erasmus Mundus Joint Master Degree (EMJMD) framework. The current program partners are: AMU Marseille, KIT Karlsruhe, the Universities of Barcelona, TAU Tampere-Finland, Vilnius University-Lithuania.

Focus Areas: Semiconductors, Magnets, Dielectrics

Focus Areas: Materials fabrication and characterization