Calendar of Physics Talks Vienna

On-Chip and Remote Sensing with Quantum Cascade Laser and Detector Systems
Speaker:Gottfried Strasser (Institute of Solid State Electronics Center for Micro- and Nanostructures TU Wien)
Abstract:Optical sensors for mid-infrared spectroscopy are widely used in industrial and environmental monitoring as well as medical and biochemical diagnostics. A sensor concept, based on a bi-functional quantum cascade heterostructure, for which the differentiation between laser and detector is eliminated, enables mutual commutation of laser and detector, simplifies remote sensing setups and facilitates a crucial miniaturization of sensing devices. Liquid sensing utilizing bi-functional quantum cascade lasers/detectors (QCLDs) can be realized on a single chip. A QCL active region design with an additional detection capability at the laser emission wavelength allows a straightforward integration, where different parts of the chip are used for lasers and others for detectors. Typical analyte interaction lengths for gas sensing are in the range of tens of centimeters or more and exceed the common
Date: Tue, 19.12.2017
Time: 16:00
Location:TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner Hauptstraße 8-10 Yellow Tower „B“, 5th floor, SEM.R. DB gelb 05 B
Contact:Univ.Prof. Dr. Gerhard Schütz

Erwin Schrödinger Lecture "Gravitational Wave Astronomy: Recent Results and Challenges for the Future"
Speaker:Sascha Husa (Universitat de les Balears)
Abstract:In this talk I will first summarize recent observations of gravitational wave events that are consistent with mergers of binary systems of black holes and of neutron stars, and discuss what we have learned so far from gravitational wave observations, and what we hope to learn in the future, regarding astrophysics and fundamental physics. I will then discuss the current plans for future ground and space based gravitational wave observatories, and the theoretical and computational challenges that need to be overcome in order to best interpret the data that such detectors will record.
Date: Tue, 19.12.2017
Time: 17:00
Duration: 60 min
Location:Erwin Schrödinger Int. Institute, Boltzmann lecture hall, Boltzmanngasse 9, 1090 Wien