Welcome to the Terahertz Spectroscopy Group at TU Dortmund University!
Some of the most interesting nonlinear interactions of electromagnetic fields with elementary excitations of condensed-matter systems occur on extremely fast time scales of only a few femtoseconds (1 fs = 10-15 s). Our group develops novel methods to generate custom-cut optical pulses with tunable center frequencies and spectral components ranging from 0.1 THz (1 THz = 1012 Hz) to >100 THz, peak amplitudes on the order of up to 1 V/Å, and durations down to the single-cycle limit. Time-domain spectroscopy – an oscilloscope for light – detects these waveforms with subcycle precision, giving access to high-order nonlinearities and coherent subcycle dynamics of complex light-matter interactions from the upper GHz regime up to the near-infrared spectral range. This spectroscopy is complemented by tailor-cut THz resonator structures fabricated by electron-beam lithography, enabling us to craft electromagnetic near fields, and to control custom optical nonlinearities on strongly sub-wavelength scales.
Research highlights of our group include high-harmonics generation, coherent nonlinearities beyond Kohn’s theorem, minimally dissipative all coherent spin switching, deep-strong light-matter coupling in specialized THz resonators, and non-adiabatic subcycle switch-off of deep-strong light-matter coupling.
News
Joshua Mornhinweg is awarded with best student paper award at IRMMW-THz 2022
Congratulations to Joshua Mornhinweg for winning the best student paper award of the 2022 IRMMW-THz Conference.
Intersubband Polariton-Polariton Scattering
Together with partners from Germany, France and Italy, we investigated ultrafast scattering dynamics of intersubband mid-infrared polaritons. Our…
Tailored Subcycle Nonlinearities of Ultrastrong Light-Matter Coupling
Together with the groups of Rupert Huber, Dominique Bougeard (University of Regensburg), and Cristiano Ciuti (Université de Paris), we explored a…
Extreme nonlinearities within a quantum cascade laser
Teaming up with partners from Germany, France, UK and Sweden, we observed high-order terahertz nonlinearities in a free-running quantum cascade laser.…
Bleaching the blur
Together with the groups of Prof. Dr. Rupert Huber (Regensburg), Prof. Dr. Miriam S. Vitiello (Pisa) and Prof. Dr. Edmund Linfield (Leeds) we…
Behind the veil of nothingness
In close collaboration with the groups of Prof. Dr. Rupert Huber, Prof. Dr. Dominique Bougeard, and with Prof. Dr. Cristiano Ciuti (Université de…
Swiftly switched spins stay cool
Information technology has to be ever faster and more compact. Yet this challenge comes with a price: Performing a task more rapidly costs more…
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Location & approach
The campus of TU Dortmund University is located close to interstate junction Dortmund West, where the Sauerlandlinie A 45 (Frankfurt-Dortmund) crosses the Ruhrschnellweg B 1 / A 40. The best interstate exit to take from A 45 is “Dortmund-Eichlinghofen” (closer to South Campus), and from B 1 / A 40 “Dortmund-Dorstfeld” (closer to North Campus). Signs for the university are located at both exits. Also, there is a new exit before you pass over the B 1-bridge leading into Dortmund.
To get from North Campus to South Campus by car, there is the connection via Vogelpothsweg/Baroper Straße. We recommend you leave your car on one of the parking lots at North Campus and use the H-Bahn (suspended monorail system), which conveniently connects the two campuses.
TU Dortmund University has its own train station (“Dortmund Universität”). From there, suburban trains (S-Bahn) leave for Dortmund main station (“Dortmund Hauptbahnhof”) and Düsseldorf main station via the “Düsseldorf Airport Train Station” (take S-Bahn number 1, which leaves every 15 or 30 minutes). The university is easily reached from Bochum, Essen, Mülheim an der Ruhr and Duisburg.
You can also take the bus or subway train from Dortmund city to the university: From Dortmund main station, you can take any train bound for the Station “Stadtgarten”, usually lines U41, U45, U 47 and U49. At “Stadtgarten” you switch trains and get on line U42 towards “Hombruch”. Look out for the Station “An der Palmweide”. From the bus stop just across the road, busses bound for TU Dortmund University leave every ten minutes (445, 447 and 462). Another option is to take the subway routes U41, U45, U47 and U49 from Dortmund main station to the stop “Dortmund Kampstraße”. From there, take U43 or U44 to the stop “Dortmund Wittener Straße”. Switch to bus line 447 and get off at “Dortmund Universität S”.
The AirportExpress is a fast and convenient means of transport from Dortmund Airport (DTM) to Dortmund Central Station, taking you there in little more than 20 minutes. From Dortmund Central Station, you can continue to the university campus by interurban railway (S-Bahn). A larger range of international flight connections is offered at Düsseldorf Airport (DUS), which is about 60 kilometres away and can be directly reached by S-Bahn from the university station.
The H-Bahn is one of the hallmarks of TU Dortmund University. There are two stations on North Campus. One (“Dortmund Universität S”) is directly located at the suburban train stop, which connects the university directly with the city of Dortmund and the rest of the Ruhr Area. Also from this station, there are connections to the “Technologiepark” and (via South Campus) Eichlinghofen. The other station is located at the dining hall at North Campus and offers a direct connection to South Campus every five minutes.
The facilities of TU Dortmund University are spread over two campuses, the larger Campus North and the smaller Campus South. Additionally, some areas of the university are located in the adjacent “Technologiepark”.
Site Map of TU Dortmund University (Second Page in English).
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