| High-intensity terahertz radiation from a microstructured large-area photoconductor A Dreyhaupt, S Winnerl, T Dekorsy, M Helm Applied Physics Letters 86 (12), 121114, 2005 | 425 | 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), 082508, 2008 | 412 | 2008 |
| 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 | 340 | 1989 |
| 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 | 332 | 2011 |
| 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 | 233 | 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), 232507, 2008 | 230 | 2008 |
| Ultrafast graphene-based broadband THz detector M Mittendorff, S Winnerl, J Kamann, J Eroms, D Weiss, H Schneider, ... Applied Physics Letters 103 (2), 021113, 2013 | 217 | 2013 |
| 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 77 (3), 035209, 2008 | 217 | 2008 |
| Origin of magnetic moments in defective TiO 2 single crystals S Zhou, E Čižmár, K Potzger, M Krause, G Talut, M Helm, J Fassbender, ... Physical Review B 79 (11), 113201, 2009 | 215 | 2009 |
| 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 | 197 | 2010 |
| Direct observation of the LO phonon bottleneck in wide GaAs/ As quantum wells BN Murdin, W Heiss, C Langerak, SC Lee, I Galbraith, G Strasser, ... Physical Review B 55 (8), 5171, 1997 | 165 | 1997 |
| 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 | 163 | 2016 |
| The basic physics of intersubband transitions M Helm Semiconductors and semimetals 62, 1-99, 1999 | 162 | 1999 |
| 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, ... Advanced Materials 25 (22), 3122-3128, 2013 | 151 | 2013 |
| Observation of the intraexciton Autler-Townes effect in GaAs/AlGaAs semiconductor quantum wells M Wagner, H Schneider, D Stehr, S Winnerl, AM Andrews, S Schartner, ... Physical review letters 105 (16), 167401, 2010 | 150 | 2010 |
| Nonvolatile bipolar resistive switching in Au/BiFeO3/Pt Y Shuai, S Zhou, D Bürger, M Helm, H Schmidt Journal of Applied Physics 109 (12), 124117, 2011 | 146 | 2011 |
| Structural and magnetic properties of Mn-implanted Si S Zhou, K Potzger, G Zhang, A Mücklich, F Eichhorn, N Schell, ... Physical Review B 75 (8), 085203, 2007 | 145 | 2007 |
| 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 | 142 | 2008 |
| Infrared spectroscopy and transport of electrons in semiconductor superlattices M Helm Semiconductor science and technology 10 (5), 557, 1995 | 141 | 1995 |
| Fe implanted ferromagnetic ZnO K Potzger, S Zhou, H Reuther, A Mücklich, F Eichhorn, N Schell, ... Applied physics letters 88 (5), 052508, 2006 | 137 | 2006 |
