Professor Dmitri Basov, Columbia University
High-mobility electron liquid in graphene: insights by infrared nano-imaging of plasmonic waves
Abstract: Optical spectroscopies are an invaluable resource for exploring new physic of new quantum materials. Surface plasmon polaritons and other forms of hybrid light-matter polaritons provide new opportunities for advancing this line of inquiry. In particular, polaritonic images obtained with modern nano-infrared tools grant us access into regions of the dispersion relations of various excitations beyond what is attainable with conventional optics. I will discuss this emerging direction of research with two examples from graphene physics: i) ultrafast dynamics of hot photo-excited electrons ; and ii) ballistic electronic transport at low temperatures .
About: Dmitri N. Basov (PhD 1991) is a Higgins professor in the Department of Physics at Columbia University. He has served as a professor (1997-2016) and Chair (2010-2015) of Physics, University of California San Diego. His research interests include: physics of quantum materials, superconductivity, two-dimensional materials, infrared nano-optics. Professor Basov has also received many prizes and awards, including a Sloan Fellowship (1999), the Genzel Prize (2014), the Humboldt research award (2009), Frank Isakson Prize, American Physical Society (2012), and Moore Investigator (2014).
 D.N. Basov, M.M. Fogler and F. J. Garcia de Abajo “Polaritons in van der Waals materials”, Science 354, 195 (2016).
 G. X. Ni, L. Wang, M. D. Goldflam, M. Wagner, Z. Fei, A. S. McLeod, M. K. Liu, F.Keilmann, B. Özyilmaz, A. H. Castro Neto, J. Hone, M. M. Fogler and D. N. Basov Nature Photonics 10, 244 (2016)
 G. X. Ni, A. S. McLeod, L. Xiong et al. [in preparation].