Keathley P D, Putnam W P, Vasireddy P, Hobbs R G, Yang Y, Berggren K K, Kärtner F X
Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA.
Department of Physics and Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Nat Phys. 2019 Jul 1;15(11):1128-1133. doi: 10.1038/s41567-019-0613-6. Epub 2019 Aug 12.
