BEGIN:VCALENDAR VERSION:2.0 PRODID:www.dresden-science-calendar.de METHOD:PUBLISH CALSCALE:GREGORIAN X-MICROSOFT-CALSCALE:GREGORIAN X-WR-TIMEZONE:Europe/Berlin BEGIN:VTIMEZONE TZID:Europe/Berlin X-LIC-LOCATION:Europe/Berlin BEGIN:DAYLIGHT TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 DTSTART:19810329T030000 RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 DTSTART:19961027T030000 RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:DSC-18307 DTSTART;TZID=Europe/Berlin:20211214T164000 SEQUENCE:1639436963 TRANSP:OPAQUE DTEND;TZID=Europe/Berlin:20211214T181000 URL:https://dresden-science-calendar.org/calendar/en/detail/18307 LOCATION:TUD\, SUMMARY:Physikalisches Kolloquium: Ultrafast Optical Control of Complex Qua ntum Materials CLASS:PUBLIC DESCRIPTION:Speaker: \nInstitute of Speaker: \nTopics:\nWillkommen\n Locati on:\n Name: TUD ()\n Street: \n City: \n Phone: \n Fax: \nDescript ion: Veranstaltungsankündigung als pdf-Download (https://tu- dresden.de/mn/physik/ressourcen/dateien/physikalisches-kolloquium/2021-12- 14-Phys_Kolloq-Kaiser-WS2021.pdf).

Kurzfassung:  It is well known fact that various phase transitions in condensed matter c an by triggered by external parameters such as temperature\, pressure\, el ectric field or magnetic field. Finding systems that show phase transition s triggered by external stimulation of light became a particular interesti ng field of research. Advanced nonlinear optical methods such as ultra-bro ad band pump-probe spectroscopy open new ways of controlling ultrafast dyn amics in complex solid-state materials on unprecedented timescales. In qua ntum materials\, finding new ways of manipulating the complex interplay of electronic phases opens new avenues in controlling physical properties an d designing new functionalities.

I will show how we investigate di fferent scenarios like the balancing between competing phases triggered by ultrashort light pulses or possibilities of dynamical stabilization of ne w states of matter in periodically driven light fields. In particular I wi ll review the remarkable possibilities to induce superconductivity in high temperature cuprate superconductors or controlling effective interactions in molecular crystals. As novel method I will discuss the avenues of Higg s-Spectroscopy that became possible through phase-resolved high-field non- linear THz spectroscopy. Tracing collective coherent order parameter oscil lations we gain insight into the ground states and the dynamics of condens ates like high Tc superconductors or excitonic insulators and I will prese nt first results and future ideas for this exciting technique.

Biographie: Stefan Kaiser studied Physics at the RWTH Aache n and received his Diploma in 2005. Then he worked with Martin Dressel at the University of Stuttgart receiving his PhD in 2010 on organic supercond uctors and investigating their interplay with charge order. As a Post-Doc and later group leader he joined Andrea Cavalleri in 2009 at the Max Plan ck Institute for the Structure and Dynamics of Matter and the Center for F ree Electron Laser Science at the University of Hamburg. The research focu s in Hamburg was on pioneering experiments in the area of Light Induced Su perconductivity\, a topic he carried on with since then. In December 2014 Stefan became head of the independent Ultrafast Solid-State Spectroscopy g roup at the Max Planck Institute for Solid State Research in Stuttgart and was appointed Juniorprofessor at the University of Stuttgart. Here Stefan developed the new method of Higgs Spectroscopy and studied aspects of col lective excitations in quantum materials. In March 2021 Stefan became Prof essor at the Institute of Solid State and Materials Physics at the TU Dres den.

DTSTAMP:20260409T171416Z CREATED:20211211T230924Z LAST-MODIFIED:20211213T230923Z END:VEVENT END:VCALENDAR