October 15, 2021
Tuning transparency and opacity
Making a dark human hair transparent, or an opaque bar of silicon transparent: this optical sorcery is possible by manipulating the incident light. This new phenomenon is called ‘mutual extinction and transparency’. Until now only existing in theory, photonics researchers of the University of Twente (MESA+ Institute) demonstrated the effect with experiments. Applications include, for […]
October 4, 2021
Free-Form Scattering Optics Program Meeting 2021
COPS is organizing the first open FFSO program meeting to be held in November 2021. The Free-Form Scattering Optics program is a joint initiative where the three Technical Universities from Twente, Eindhoven, and Delft collaborate to enable high-tech optical devices that contribute to society at large. Crucial to the success of the FFSO Consortium is […]
September 17, 2021
New COPS member Timon Vreman
Timon Vreman has started as a new PhD student at COPS. During his master’s, Timon has worked on wavefront shaping the reflectivity of photonic band gap crystals. Now, he will work on measuring the local density of states in finite-size photonic quasicrystals under the supervision of prof. dr. W.L. Vos.
August 20, 2021
Masters’ thesis defense of Timon Vreman
On July 8, 2021, Timon Vreman successfully defended his masters’ thesis titled “Shaping waves in 3D photonic band gap crystals” and obtained MSc degree in Applied Physics. The thesis work was carried out under the supervision of Manashee Adhikary and Willem Vos.
August 18, 2021
André de Mots and Bert Mulder obtain their bachelor’s in Applied Physics
On July 8th, 2021, both André de Mots and Bert Mulder obtain their bachelor’s degrees in Applied physics. Their theses are titled ‘High precision phase measurement setup for mutual extinction’ and ‘Correlations in Scattering Diffusers for Li-Fi Technology’, respectively. Both students were supervised by Alfredo Rates and Prof. Willem Vos. Congratulations!  
July 8, 2021
Thijmen Huisman completes his internship project
On July 8th, 2021, Thijmen Huisman completed his internship project at COPS for his bachelor’s degree in Mechanical Engineering at Saxion University of Applied Sciences. Thijmen successfully designed an automated integrating sphere setup which is controlled remotely to measure total transmission and reflection of multiple samples. This project was carried out under the supervision of […]
April 29, 2021
Steering waves deep into a forbidden gap
The propagation of light can be radically controlled with tailor-made nanostructures, called photonic crystals. The main feature of such crystals is a forbidden gap: waves with colors within a forbidden range travel only a limited distance – called Bragg length – before being reflected due to Bragg interference. Once a crystal is fabricated its properties […]
Inside back cover of 17 Dec. 2020 of Advanced Optical Materials
December 21, 2020
Deterministic Scattering Media on Cover of Advanced Optical Materials
Artwork about our recent publication on deterministic random scattering media appeared on a cover of Advanced Optical Materials on 17 Dec. 2020. We think the snowy scene serves well as a Xmas wish to all our friends and colleagues.
Design of a nanofabricated optically multiple-scattering sample using direct laser writing
November 18, 2020
Semi-random Scattering of Light
What is the exact path of light inside a highly scattering material like white paint? This is a question that is impossible to answer, as the particles inside the paint are distributed randomly. This, at the same time, is a very attractive property for applying photonics in non-hackable security applications. Still, you would like to […]
October 29, 2020
João Martins receives MSc degree at Universidade do Minho
On Friday 21 October 2020, João Ricardo Gonçalves Martins has successfully presented his research project “Study of the Förster resonance energy transfer (FRET) in ensembles of colloidal PbS quantum dots emitting in the near-infrared spectral range.” Therefore, he has been awarded the MSc degree by the Departamento de Fisica of the Universidade do Minho in […]
October 19, 2020
Master colloquium Shivan Bissesar
Shivan Bissesar has successfully defended his report entitled “Optimisation of spin glass Hamiltonians using photon Bose-Einstein condensates” on 28th September 2020. Consequently, he was awarded the degree of Master of Science (M.Sc.): congratulations Shivan! The work was carried out in the Complex Photonic Systems (COPS) chair within the MESA+ Institute for Nanotechnology under the supervision […]
October 19, 2020
New COPS paper in collaboration with TU Denmark and University of Yasouj
Congratulations to COPS MSc graduate Klaas-Jan Gorter, who spent a successful internship in the Department of Photonics Engineering at the TU Denmark in Lyngby, in the group led by prof. Martijn Wubs (himself a COPS alumnus, some years earlier 😉 see here). An illustration of their success is the publication of a paper in the […]