Transient field-resolved reflectometry at 50-100 THz

Neuhaus, Marcel; Schötz, Johannes; Aulich, Mario; Srivastava, Anchit; Kimbaras, Dziugas; Smejkal, Valerie; Pervak, Vladimir; Alharbi, Meshaal; Azzeer, Abdallah M.; Libisch, Florian; Lemell, Christoph; Burgdörfer, Joachim; Wang, Zilong und Kling, Matthias F. (2022): Transient field-resolved reflectometry at 50-100 THz. In: Optica, Bd. 9, Nr. 1: S. 42-49

Abstract

Transient field-resolved spectroscopy enables studies of ultrafast dynamics in molecules, nanostructures, or solids with sub-cycle resolution, but previous work has so far concentrated on extracting the dielectric response at frequencies below 50 THz. Here, we implemented transient field-resolved reflectometry at 50-100 THz(3-6 mu m) with MHz repetition rate employing 800 nm few-cycle excitation pulses that provide sub-10 fs temporal resolution. The capabilities of the technique are demonstrated in studies of ultrafast photorefractive changes in semiconductors Ge and GaAs, where the high frequency range permits to explore the resonance-free Drude response. The extended frequency range in transient field-resolved spectroscopy can further enable studies with so far inaccessible transitions, including intramolecular vibrations in a large range of systems. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2334-2536
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 491502892
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 398816777