Since February 2022, Omar El Gawhary, from the Optics group of ImPhys, has been appointed as member of the Council of Experts on National Measurement Standards (Raad van deskundigen van de nationale meetstandaarden). The Council, appointed by the Dutch Ministry of Economic Affairs and Climate (EZK) advises the Dutch Government on strategic choices concerning the …
We develop sensing technology that will enable quick and extremely cost effective remote condition and fault monitoring of key assets in all kind of technical use.
Hello My Name is Roald, A PhD student in QuPsi. My main focus of my PhD is bridging the fields of SNSPD’s, high Tc superconductors and integrated photonics. A SNSPD is a superconducting nanowire single photon detector. The operating principle is quite easy to follow. We bring this device close to a regime where it …
Understanding the size-dependent properties of various material ultra-thin films for integrated circuits is critical for nanotechnology innovation. Photonic measurement methods in the soft-X ray to IR wavelength range that approach theoretical limits require improved traceability coupled with rigorous uncertainty estimations to provide the tools needed to characterize novel optical materials. To increase the applicability of …
Continue reading “Advanced Traceable Metrology for Optical Constants (ATMOC)”
obtained her bachelor degree in Measurement, Control Technology and Instruments at the Department of Precision Instruments at Tsinghua University in China in 2019. Afterwards she pursued a master’s degree in Photonics at Friedrich Schiller University Jena in Germany. She gained experience of fiber-assisted imaging systems during her master study and her Master thesis’ topic is …
Superconducting niobium nitride (NbN) hot electron bolometers (HEBs) are so far the most sensitive heterodyne detectors for high-resolution spectroscopy at supra-terahertz frequencies (1 – 6 THz). They take advantage of a local oscillator to convert a THz line into a GHz line. Within this frequency range, many atomic, ionic, and molecular spectral lines provide information …
Continue reading “New superconducting material raises the operating temperature of space detectors”
Skin spectroscopy and imaging for cosmetics and dermatology, A. Ezerskaia (2020) Tunable Optics: Spectral Imaging and Surface Manipulation on Liquid Lenses, M. Strauch (2020) Computational methods for phase retrieval: Non-iterative methods, Ptychography, and Diffractive Shearing Interferometry, A.P. Konijnenberg (2019) Applications of Optical Birefringence: With Natural-Materials and Meta-Materials, Y. Tang (2019) Ray-based methods for simulating aberrations …
Bachelor at the Faculty of Applied Physics TN1302 “Mechanica Golven Optica” (Aurèle Adam)Introduction to Mechanics, Waves and Optics for 1st year. First course of physics. TN2421 “Optics” (Aurèle Adam, Paul Urbach)Optics course for 3rd year, including geometrical optics, wave optics, polarization, coherence, diffraction and lasers, based on our own Optics book available via TU Open. …
Coherent Fourier Scatterometry (CFS) involves a coherent source which is focused on the sample (in this project 1D silicon grating). After interacting with a sample, the reflected intensity in the pupil plane of the lens is measured and compared to rigorous simulations from which the grating parameters are determined. By using two polarizers, one for …
Continue reading “CFS for reconstruction of printed nanostructures”
Ptychography is a scanning Coherent Diffraction Imaging (CDI) method for reconstructing a complex valued object function from intensity measurements recorded in the Fraunhofer or Fresnel diffraction region. The technique provides a solution to the so-called ‘phase problem’ and is found to be very suitable for Extreme Ultraviolet (EUV) and X-ray imaging applications due to its …
Continue reading “New methods and applications of Ptychography”