The Department’s Professor Mike Adams explains: 'The research topic is "Injected Spin Lasers", that is lasers whose output polarisation is controlled by the injection of spin-polarised electrons. Polarisation is a property of waves that describes the orientation of their oscillations.
Circular polarisation of laser radiation means that the tip of the electric field vector, at a fixed point in space, describes a circle as time progresses. Circular polarisation is referred to as right or left, depending on the direction in which the electric field vector rotates. An electron has one of two types of spin: spin up or spin down. In a spin-injected laser, spin down electrons couple to right circularly polarised radiation, whilst spin up electrons couple to left circularly polarised radiation, thus allowing us to control the output polarisation of the laser.'
'This research comes within the general topic of "spintronics", which is the focus of major research worldwide aimed chiefly at using the spin of electrons to indicate the ones and zeros of binary computing, but there is little effort associated with spin-polarised light sources. This inter-disciplinary project is aimed at understanding the dynamics of spin lasers and covers advanced physics concepts such as chaos and instabilities, as well as optoelectronic components and sub-systems used in telecommunications engineering.'
EU Marie Curie Fellowships support the training and mobility of researchers, whilst promoting excellence in European research.
Victoria Bartholomew | alfa
LandKlif: Changing Ecosystems
06.07.2018 | Julius-Maximilians-Universität Würzburg
“Future of Composites in Transportation 2018”, JEC Innovation Award for hybrid roof bow
29.06.2018 | Fraunhofer-Institut für Lasertechnik ILT
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
17.07.2018 | Information Technology
17.07.2018 | Materials Sciences
17.07.2018 | Power and Electrical Engineering