Terahertz physics of graphene, possibly the most nonlinear material we know

​Graphen Centre Seminar med Dmitry Turchinovich, Bielefeld University, Tyskland


The interaction of graphene with THz electromagnetic waves is dominated by the collective, thermodynamic response of conduction electrons in graphene to the THz excitation. Due to very efficiently energy transfer from the incident electromagnetic field to electronic system of graphene, facilitated by the excellent transport properties of Dirac electrons, the electronic temperature in graphene becomes strongly modulated by the THz excitation. As a result, the THz conductivity of graphene becomes highly nonlinear, leading to very strong THz saturable absorption and extremely efficient THz high harmonics generation in graphene. The effective nonlinear coefficients of graphene in the THz frequency range exceed that of any known material by many orders of magnitude. This possibly makes graphene the most nonlinear material we know.​

​Kaffe och kaka serveras utanför Kollektorn efter seminariet då du också har möjlighet att prata med Prof. Turchinovich.  
Kategori Seminarium
Plats: Kollektorn, lecture room, Kemivägen 9, MC2-huset
Tid: 2020-01-27 13:00
Sluttid: 2020-01-27 14:00

Publicerad: må 13 jan 2020.