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All-optical probe of three-dimensional topological insulators based on high-harmonic generation by circularly-polarized laser fields
Denitsa Baykusheva, Alexis Chacón, Jian Lu +9
We report the observation of a novel nonlinear optical response from the prototypical three-dimensional topological insulator BiSe through the process of high-order harmoni…
Probing Electron-Hole Coherence in Strongly-Driven Solids
Christian Heide, Yuki Kobayashi, Amalya Johnson +4
High-harmonic generation (HHG) is a coherent optical process in which the incident photon energy is up-converted to the multiples of its initial energy. In solids, under the influe…
Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
Ouri Karni, Elyse Barré, Vivek Pareek +21
Interlayer excitons (ILXs) - electron-hole pairs bound across two atomically thin layered semiconductors - have emerged as attractive platforms to study exciton condensation, singl…
Ultrafast adsorbate excitation probed with sub-ps resolution XAS
Elias Diesen, Hsin-Yi Wang, Simon Schreck +24
We use a pump-probe scheme to measure the time evolution of the C K-edge X-ray absorption spectrum (XAS) from CO/Ru(0001) after excitation by an ultrashort high-intensity optical l…