2-D THz spectroscopy of electronic dynamics in narrow-band semiconductors
April 15, 2019 (more to follow)Probing ballistic electrons and band curvatures with THz spectroscopy
The so-called “band structure” of solid-state materials determines how electrons move through them, and is often critical in understanding an even manipulating their conductive properties. Scientists at ETH Zurich have demonstrated a new method applying low-frequency electromagnetic pulses to drive electrons in a “ballistic” regime, using them to measure subtle features of the band structure.
Reference: S. Houver, L. Huber, M. Savoini, E. Abreu, and S. L. Johnson, 2D THz spectroscopic investigation of ballistic conduction-band electron dynamics in InSb, Vol. 27, No. 8, 15 Apr 2019, OPTICS EXPRESS, 10854 (https://doi.org/10.1364/OE.27.010854)