High-intensity terahertz radiation from a microstructured large-area photoconductor A Dreyhaupt, S Winnerl, T Dekorsy, M Helm
Applied Physics Letters 86 (12), 2005
451 2005 Room temperature ferromagnetism in ZnO films due to defects Q Xu, H Schmidt, S Zhou, K Potzger, M Helm, H Hochmuth, M Lorenz, ...
Applied Physics Letters 92 (8), 2008
430 2008 Carrier relaxation in epitaxial graphene photoexcited near the Dirac point S Winnerl, M Orlita, P Plochocka, P Kossacki, M Potemski, T Winzer, ...
Physical review letters 107 (23), 237401, 2011
360 2011 Intersubband emission from semiconductor superlattices excited by sequential resonant tunneling M Helm, P England, E Colas, F DeRosa, SJ Allen Jr
Physical review letters 63 (1), 74, 1989
326 1989 Long lifetimes of quantum-dot intersublevel transitions in the terahertz range EA Zibik, T Grange, BA Carpenter, NE Porter, R Ferreira, G Bastard, ...
Nature materials 8 (10), 803-807, 2009
243 2009 Room temperature ferromagnetism in carbon-implanted ZnO S Zhou, Q Xu, K Potzger, G Talut, R Grötzschel, J Fassbender, ...
Applied Physics Letters 93 (23), 2008
239 2008 Ultrafast graphene-based broadband THz detector M Mittendorff, S Winnerl, J Kamann, J Eroms, D Weiss, H Schneider, ...
Applied Physics Letters 103 (2), 2013
237 2013 Origin of magnetic moments in defective S Zhou, E Čižmár, K Potzger, M Krause, G Talut, M Helm, J Fassbender, ...
Physical Review B—Condensed Matter and Materials Physics 79 (11), 113201, 2009
233 2009 Crystallographically oriented Co and Ni nanocrystals inside ZnO formed by ion implantation and postannealing S Zhou, K Potzger, J Von Borany, R Grötzschel, W Skorupa, M Helm, ...
Physical Review B—Condensed Matter and Materials Physics 77 (3), 035209, 2008
231 2008 Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna M Beck, H Schäfer, G Klatt, J Demsar, S Winnerl, M Helm, T Dekorsy
Optics Express 18 (9), 9251-9257, 2010
213 2010 High-field high-repetition-rate sources for the coherent THz control of matter B Green, S Kovalev, V Asgekar, G Geloni, U Lehnert, T Golz, M Kuntzsch, ...
Scientific reports 6 (1), 22256, 2016
189 2016 Structural and magnetic properties of Mn-implanted Si S Zhou, K Potzger, G Zhang, A Mücklich, F Eichhorn, N Schell, ...
Physical Review B—Condensed Matter and Materials Physics 75 (8), 085203, 2007
184 2007 The basic physics of intersubband transitions M Helm
Semiconductors and semimetals 62, 1-99, 1999
183 1999 Direct observation of the LO phonon bottleneck in wide GaAs/ BN Murdin, W Heiss, C Langerak, SC Lee, I Galbraith, G Strasser, ...
Physical Review B 55 (8), 5171, 1997
173 1997 Thermally assisted all-optical helicity dependent magnetic switching in amorphous Fe100-xTbx alloy films A Hassdenteufel, B Hebler, C Schubert, A Liebig, M Teich, M Helm, ...
Adv. Mater 25 (22), 3122-3128, 2013
171 2013 Observation of the Intraexciton Autler-Townes Effect in M Wagner, H Schneider, D Stehr, S Winnerl, AM Andrews, S Schartner, ...
Physical Review Letters 105 (16), 167401, 2010
171 2010 Demonstration of a broadband photodetector based on a two‐dimensional metal–organic framework H Arora, R Dong, T Venanzi, J Zscharschuch, H Schneider, M Helm, ...
Advanced Materials 32 (9), 1907063, 2020
162 2020 Spectroscopic THz near-field microscope HG Von Ribbeck, M Brehm, DW Van der Weide, S Winnerl, O Drachenko, ...
Optics Express 16 (5), 3430-3438, 2008
159 2008 Decisive role of oxygen vacancy in ferroelectric versus ferromagnetic Mn-doped BaTiO3 thin films Y Shuai, S Zhou, D Bürger, H Reuther, I Skorupa, V John, M Helm, ...
Journal of Applied Physics 109 (8), 2011
149 2011 Nonvolatile bipolar resistive switching in Au/BiFeO3/Pt Y Shuai, S Zhou, D Bürger, M Helm, H Schmidt
Journal of Applied Physics 109 (12), 2011
144 2011 