In a newly published Physical Review Letter, we propose that structural disorder can generate coherent, directional light from the passage of charged particles. The project leading to this insight was spear-headed by Zheng Gong and rewarded with an Editors’ Suggestion and a discussion in Physics. Congrats to Zheng for this remarkable success!
Congrats to Jakob Hüpfl for defending his PhD thesis “Information in Scattered Light – From optical cooling to Fisher-information flow and decoherence”. Many thanks go to the external reviewers Allard Mosk (Utrecht) and Klaus Hornberger (Duisburg-Essen). All the best to Jakob for his postdoctoral appointment in Florian Marquardt’s group at the MPI for the Science of Light!
Today Oliver Diekmann successfully defended his PhD thesis on “Controlling Pulsed Quantum Emission: From State Transfer to Superradiance” – congratulations! The external reviewers were Sasha Puddubny from the Weizmann Institute and Andreas Nunnenkamp from the University of Vienna – many thanks go to them for their assessment of the thesis.
Together with the team of Carsten Rockstuhl (Karlsruhe) and Thomas Weiss (Graz), we just published a key result of David’s PhD thesis in Light: Science & Applications. What we show, in a nutshell, is that any dielectric object of finite size goes through a symmetry-breaking transition if its refractive index is driven sufficiently strongly and fast – allowing one to build a new type of laser or a coherent-perfect-absorber.
The first paper emerging from our collaboration with Carlos was just published in PRL (open access). Zeyu and Oliver showed both analytically and numerically that placing two qubits in a suitably engineered waveguide results in perfect state transfer between the qubits. Whereas a conventional waveguide results in no more than 54% transfer efficiency (see top panel in the image), our new design reaches close to 100% by inverting the pulse shape (see bottom panel). Check out TU Wien’s press release and the feature highlight in Optics & Photonics News.
Paul Mabey from IOP publishing wrote a nice piece in Physics World about our work with Jan Wiersig on the sensing performance of Exceptional Points. Check it out at this link.
Zeyu (right) received the best talk award at the recent Nanophotonics Science Camp in the UK for his talk on “Adiabatic Energy Transfer in Periodically Modulated Time-Varying Media”. Congratulations to Zeyu, pictured receiving the award from Arthur Goetschy (left), who organized the workshop!
Together with Jan Wiersig from Magdeburg/Germany, we just published an article in Reports on Progress in Physics (open access) that combines two research thrusts in our group: Fisher information (FI) and Exceptional Points (EPs). We demonstrate how EPs can enhance the FI and how moving away from the EP can lead to an even greater improvement in measurement precision. Our work establishes a general framework for understanding the role of non-Hermitian degeneracies in parameter estimation and clarifies under which conditions EPs provide genuine metrological advantages.
Marlene Hudler and David Fürlinger successfully defended their master theses with exciting results on spatiotemporal focusing with the Floquet scattering matrix and on matrix imaging for ultrasound localization microscopy – congratulations!
