Seminars
2025
Nonlinear all-optical control and detection of ultrafast bandgap engineering
Giancarlo Soavi, University of Jena, Germany
2024
Manipulating the character and shape of quantum light
Marco Bellini, National Institute of Optics (CNR-INO), Italy
Machine-learning-assisted design of materials for energy
Silvana Botti, University of Bochum, Germany
2023
Computational imaging
Ivo Ihrke, University of Siegen, Germany
2022
Quantum- and nano-optics with tunable microcavities
David Hunger, KIT, Germany
2019
The world’s fattest Schrödinger cat
Tommaso Calarco, FZ Jülich, Germany
From chaotic lasing to photon statistics: Small and large scale fluctuations in the emission of quantum dot lasers
Nina Owschimikow, TU Berlin, Germany
2018
Quantum optics and information science in multi-dimensional photonics networks
Christine Silberhorn, University of Paderborn, Germany
2017
Color centers in diamond: Controlling single spins and single photons
Christoph Becher, University of Saarland, Germany
Energy conversion in semiconductor nanocrystals
Jochen Feldmann, Ludwig-Maximilians Universität (LMU), Germany
Anderson localisation and Levy sums in random lasers
Sushil Mujumdar, Tata Institute for Fundamental Research, India
Superconducting nanowire single-photon detectors: physics and applications
Félix Bussières, Uni Geneva and ID Quantique, Switzerland
2015
Precision molecular spectroscopy: a strategic window for fundamental and applied physics
Paolo De Natale, National Institute of Optics (CNR-INO), Italy
Probing optical modes with relativistic electrons
Nahid Talebi, Max Planck Institute for Solid State Research, Germany
2024
Novel approaches to nanoscale sensing using color centers in diamond
Elke Neu-Ruffing, RPTU Kaiserslautern Landau, Germany
Engineering colour centres for quantum technologies towards integrated quantum photonics
Stefania Castelletto, RMIT University, Australia
2019
Exploring field-induced remnant magnetization trap for ultracold atoms on a niobium atomchip
Naz Shokrani, TU Wien, Austria
Saturation absorption spectroscopy on Cs atoms
Amr Farrag, University of Alexandria, Egypt
Study of the nano and microstructures surface role on the polarisation characteristics of the reflected light
Morteza Asghari, Iran University of Science and Technology, Iran
Optics in silicon solar cells
Habtamu Gebrewold, Fraunhofer Institute for Solar Energy Systems, Germany
2018
Fabrication of micro-lenses on single-mode optical fibers by 3D direct laser writing
Sapideh Mazloomzadeh, University of Bonn, Germany
Electrical excitation of color centers in diamond: the route towards efficient room-temperature single-photon sources
Dmitry Yu. Fedyanin, Moscow Institute of Physics and Technology, Russian Federation
Optical properties of DNA self-assembled metal nanoclusters
Nemanja Markesevic, ESPCI, France
Implementation of microscope from three femtosecond laser sources for stimulated Raman losses and stimulated Raman gain
Rajeev Ranjan, National Research Council, Italy
2017
Accuracy of TCSPC-based fluorescence lifetime data and its dependence on number of detected photons
Sara Rahmati, Forschungszentrum Jülich, Germany
Towards a quantum advantage with photonics
Jelmer Renema, Oxford University, United Kingdom
2016
Whispering-gallery mode shifts with dielectric materials in the evanescent field of a resonator
Navid Soltani, Max Planck Institute for the Science of Light, Germany
Quadrature-squeezed light generation from single emitters mediated by optical nanostructures
Diego Martin-Cano, Max Planck Institute for the Science of Light, Germany
Theoretical explorations of nonclassical effects of plasmonics in metallic nanostructures
Wei Yan, Technical University of Denmark (DTU), Denmark
Ion beam and laser-assisted microfabrication in diamond
Stefano Lagomarsino, University of Florence and INFN, Italy
Polaritonic modes in a dense cloud of atoms
Nick Schilder, Institut d'Optique, Paris, France
2015
Adaptive magnetometry with single spins in diamond
Cristian Bonato, Technical University of Delft, Netherlands
Tailored wettability surfaces: sensing – templates – biological scaffolds and 3D nanostructures for photonic / plasmonic applications
Ermanno Miele, Case Western Reserve University, USA
THz time-domain spectroscopy for studies of Renaissance artworks
Jordanka Tasseva, European Laboratory for Nonlinear Spectroscopy (LENS), Italy
A full characterization of light-harvesting pigment excited-state dynamics by ultrafast electronic and vibrational spectroscopies
Elena Ragnoni, European Laboratory for Nonlinear Spectroscopy (LENS), Italy
Electrical detection of DNA
Arpita De, TU Munich, Germany
Quantum emitters in polymeric micro-resonators
Assegid M. Flatae, Karlsruhe Institute of Technology, Germany
Coercing homonuclear alkali dimmers into heavy Rydbergs
Marco Ascoli, University of Connecticut, USA
Plasmonic cavities for single quantum-dot emission control
Arunandan Kumar, CNRS, France
2023
Small angle light scattering theoretical and experimental approach
Andrii Nehrych, Forschungszentrum Julich, Germany
Generating and manipulating single photons with single molecules
Stephan Götzinger, Max-Planck Institute of the Science of Light and FAU, Germany
Quantum sensing based on color centers in diamond
Assegid Flatae, Univeristy of Siegen, Germany
Four-wave mixing spectroscopy of exciton complexes in quantum dot molecules and 2D semiconductors
Daniel Wigger, Trinity College Dublin, Ireland
2022
Plasmon assisted ultrafast photon emission of silicon vacancy (SiV) color centers in diamond membrane
Haritha Kambalathmana, University of Siegen, Germany
Photoluminescence and photocatalytic properties of Er3+-doped In2O3 thin films prepared by sol-gel
Yassamina Keriti, University of Florence, Italy
Quantum optics meets microscopy: An ultra-sensitive resonator microscope and micro-resonator platform
Florian Steiner, LMU, Germany
Luminescence studies of color centers in diamond nanocrystals
Tanya Agrawal, University of Siegen, Germany
Vector magnetometry using nitrogen-vacancy centers in diamond
Philipp Reuschel, University of Siegen, Germany
Electrical excitation of color centers in n-type diamond Schottky diodes
Florian Sledz, University of Siegen, Germany
2021
A scanning planar antenna
Navid Soltani, University of Siegen, Germany
2019
Toward 100% efficiency of photon extraction from single silicon vacancies in diamond
Dmitry Yu. Fedyanin, Moscow Institute for Physics and Technology, Russian Federation
Integration of new materials into silicon based nanophotonics
Stephan Suckow, AMO GmbH, Germany
Probing light-matter interaction in the near-field of nanostructured media
Valentina Krachmalnicoff, Institut Langevin, France
2018
Advanced fluorescence microscopy methods in cell biology - from fluorescence proteins, ion concentrations and super-resolution
Thomas Gensch, Forschungszentrum Jülich, Germany
Metal and alloy nanoparticles from ultrafast, scalable Laser synthesis and their application potential in catalysis and biomedicine
Stephan Barcikowski, University of Duisburg-Essen, Germany
Single emitter nano-optics: From quantum dots to graphene
Klas Linfords, University of Cologne, Germany
Quantum control of single spins in diamond for enhanced sensing
Nicole Fabbri, European Laboratory for Nonlinear Spectroscopy (LENS), Italy
2017
Coherent coupling of single molecules to an optical microcavity
Hrishikesh Kelkar, Max Planck Institute for the Science of Light, Germany
From optical near-field control to nanoscale quantum control
Walter Pfeiffer, University of Bielefeld, Germany
Atomically thin semiconductors light up
Rudolf Bratschitsch, University of Muenster, Germany
A new perspective on nanoscale structure and dynamics with ultrasensitive optical microscopy
Philipp Kukura, University of Oxford, United Kingdom
Highly efficient light extraction and directional emission from large refractive-index media with a planar Yagi-Uda antenna
Hossam Galal, University of Siegen, Germany
2016
Micro- to nano-resonators for light emission
Assegid Flatae, University of Siegen, Germany
Teaching
Theses
2025
Multiparameterquantensensorik mithilfe von Farbzentren in Diamanten
2022
Spectroscopy of nanobeads in a scanning planar antenna
2021
Wide field based interferometric scattering microscope
2020
Creation of nitrogen-vacancy centers in diamond by thermal annealing and laser irradiation
2019
Fluorescence lifetime imaging microscopy for color centers in diamond
2018
Optical properties of matrix implanted SiV centers in diamond membranes
Scanning confocal microscope for imaging color centers in diamond
2024
Development and study of a Schottky diode on 4H-Silicon Carbide (SiC) and its electrical characterization
The response function of optically detected magnetic resonance (ODMR)
Quantum nano-optics of artificial light harvesting complexes
2023
(Temperature resolved) spectroscopy of silicon-vacancy and nitrogen-vacancy color centers in nano-diamond
Nanooptical coherent spectroscopy
Optical properties of Sm3+ doped in Ba2SiO4 and Sr2SiO4 single nanocrystals
Measuring the electrical conductivity and properties of n-type silicon carbide (SiC) samples
Optical properties of color center in silicon carbide created by ion plantation and post annealing
2022
Fiber-based planar antenna
Time resolved spectroscopy of quantum emitters at high repetition rate
Study of non-linear effects using single mode fiber
Optical properties of color centers in diamond nanocrystal and their coupling to plasmonic metal nanoparticles
Frequency Selective Surface (FSS) for Optically Detected Magnetic Resonance (ODMR) in Nitrogen Vacancy (NV) centre in diamond
Electrical excitation of color centers in n-type diamond Schottky diodes
Vector magnetometry based on polarimetric optically-detected magnetic resonance
2021
Optical spectroscopy of epitaxially grown 2D materials (e.g. graphene)
Biosensing with planar optical antennas
Controlled creation of Silicon-Vacancy color centers in diamond by local ion implantation
Planar-antennas for enhancing graphene photodetectors
2020
Designing optical gates for the ultrafast detection of single-photons
2018
Nano-optical investigations of gold nanorods and nanocones
Accuracy of TCSPC-based fluorescence lifetime data and its dependence on number of detected photons
Nano-optical studies of silicon-vacancy color centers in thin polycrystalline diamond membranes
Haritha Kambalathmana, University of Siegen, Germany
Planar nano-antennas for spectroscopy and sensing
Navid Soltani, University of Siegen, Germany
Optical properties and wave propagation in 2D semiconductor-based photonic crystals
Mario Agio, University of Pavia, Italy and Iowa State University, USA
Molecular scattering and fluorescence in strongly confined optical fields
Mario Agio, ETH Zurich, Switzerland
Optics Lab
With support of the Faculty of Natural Sciences and Technology an “Optics Lab” was established at the Department of Physics. This laboratory allows students to build and modify experiments in the framework of lab courses and other training activities to strengthen their knowledge and experimental skills in optics and photonics. Topics include for instance fluorescence correlation spectroscopy (FCS), Hanbury Brown-Twiss (HBT) interferometry and surface-plasmon resonance (SPR) sensing.
