Synchrotron and Free electron laser Radiation: generation and application (SFR-2018)

Nonlinear THz spectroscopy of graphene and GaAs quantum wells using a free-electron laser

Not scheduled

15m

Conference Hall (Budker INP)

Invited Oral THz radiation aplication

Speaker

Dr Harald Schneider (Helmholtz-Zentrum Dresden-Rossendorf)

Description

The mid-infrared and THz free-electron laser facility FELBE in Dresden, Germany, provides intense, nearly transform-limited picosecond pulses, which can also be combined with synchronous pico- or femtosecond pulses from near-infared tabletop lasers, thus providing unique research opportunities to advance our knowledge on the interaction of intense mid-infrared and THz fields with materials and devices. This talk reviews some recent experiments using FEL-based intense narrow-band terahertz fields, in particular pump-induced optical anisotropy and nonlinear four-wave mixing in graphene, and dressing of excitons, exciton-polaritons, and intersubband transitions in GaAs quantum wells.