Professor Dmitri Basov, Columbia University

High-mobility electron liquid in graphene: insights by infrared nano-imaging of plasmonic waves

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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 [2]; and ii) ballistic electronic transport at low temperatures [3].

 

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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).

 

Citations
[1] D.N. Basov, M.M. Fogler and F. J. Garcia de Abajo “Polaritons in van der Waals materials”, Science 354, 195 (2016).

[2] 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)

[3] G. X. Ni, A. S. McLeod, L. Xiong et al. [in preparation].