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Recent presentation at SPIE Optics + Photonics 2017

Thz Spintronics Spie2017

Dmitry Turchinovich new professor at UDE

On 01.04.2017 Dmitry Turchinovich was appointed professor of experimental physics at the University of Duisburg-Essen.

Dmitry Turchinovich received M.Sc. in engineering and technology from St. Petersburg State Electrotechnical University and Ioffe Institute (1999), and Ph.D in physics from the University of Freiburg (2004). In 2005 - 2008 he was postdoc at Utrecht University and at Technical University of Denmark (DTU). From 2008 to 2014 Dmitry Turchinovich served on DTU faculty as an assistant and associate professor. In 2012 he joined Max Planck Institute for Polymer Research in Mainz, as the leader of Ultrafast dynamics & Terahertz spectroscopy research group.

In 2013 Dmitry Turchinovich was awarded with the European Union Career Integration Grant, and in 2016 he was designated senior member of the Optical Society of America. In 2015-2016 he held visiting professorship at Osaka University.

The research interests of Dmitry Turchinovich are ultrafast and terahertz dynamics of charge, lattice and spins in condensed matter systems, and general ultrafast science.

Selected recent publications:

H. Kim et al., Direct observation of mode-specific phonon-band gap coupling in methylammonium lead halide perovskites
Nature Communications 8, 687 (2017)

T. Seifert et al., Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
Nature Photonics 10, 483 (2016)

H. Tu et al., Stain-free histopathology by programmable supercontinuum pulses
Nature Photonics 10, 534 (2016)

Z. Jin et al., Accessing the fundamentals of magnetotransport in metals with terahertz probes
Nature Physics 11, 761 (2015)

Z. Mics et al.,Thermodynamic picture of ultrafast charge transport in graphene
Nature Communications 6, 7655 (2015)

>> UDE press release

Our research: Ultrafast terahertz condensed matter physics

Many elementary processes in electron, phonon and spin subsystems of a solid: e.g. momentum relaxation times of conduction electrons, lattice oscillation periods, spin-flip times and spin precession periods, occur on the ultrafast timescale of 10s of femtoseconds to a few picoseconds.

This timescale $\tau$ matches the terahertz (THz) frequency range, broadly defined as $\omega / 2\pi$ ~ 0.1 – 30 THz, and corresponding to the period of oscillation of electromagnetic fields in the range ~ 10 ps - 30 fs, or to the photon energies of ~ 0.4 – 120 meV. This facilitates the use of THz radiation for spectroscopy in a unique regime of $\omega \tau$ ~ 1, where the elementary ultrafast dynamics in condensed matter can be directly resolved.

Based on modern femtosecond laser technology, ultrafast THz spectroscopy allows one to directly probe equilibrium and non-equilibrium dynamics of charge, lattice and spins with temporal resolution down to 10s of femtoseconds, in a contact-free and non-destructive fashion.

The all-optical, contact-free nature of ultrafast THz spectroscopy in turn conveniently allows for investigation of ultrafast dynamics on the nano-scale. Systems such as e.g. nano-particles, organic and inorganic nanostructures (e.g. semiconductor quantum wells, dots and wires, graphene, carbon nanotubes, 2D materials, spin valves etc) can be routinely investigated, without the need to attach the contacts or embed markers of any sort. The information on such processes as e.g. linear and nonlinear nano-scopic motion of charge (both collective or single) on the femtosecond timescale; or the ultrafast dynamics of spins and lattice, can be directly and reliably inferred from the experiments. All this makes ultrafast THz spectroscopy an invaluable tool in modern nanoscience.