Hot electron dynamics in a semiconductor nanowire under intense THz excitation

Autor: Luferau, Andrei, Obst, Maximilian, Winnerl, Stephan, Pashkin, Alexej, Kehr, Susanne C., Dimakis, Emmanouil, Kaps, Felix G., Hatem, Osama, Mavridou, Kalliopi, Eng, Lukas M., Helm, Manfred

Publikováno v: ACS Photonics 11, 3123 (2024)

We report THz-pump / mid-infrared probe near-field studies on Si-doped GaAs-InGaAs core-shell nanowires utilizing THz radiation from the free-electron laser FELBE. Upon THz excitation of free carriers, we observe a red shift of the plasma resonance i

Externí odkaz: http://arxiv.org/abs/2403.17195

Terahertz Twistoptics -- engineering canalized phonon polaritons

Autor: Obst, Maximilian, Nörenberg, Tobias, Álvarez-Pérez, Gonzalo, de Oliveira, Thales V. A. G., Taboada-Gutiérrez, Javier, Feres, Flávio H., Kaps, Felix G., Hatem, Osama, Luferau, Andrei, Nikitin, Alexey Y., Klopf, J. Michael, Alonso-González, Pablo, Kehr, Susanne C., Eng, Lukas M.

The terahertz (THz) frequency range is key to study collective excitations in many crystals and organic molecules. However, due to the large wavelength of THz radiation, the local probing of these excitations in smaller crystalline structures or few-

Externí odkaz: http://arxiv.org/abs/2308.03343

Terahertz Twistoptics-Engineering Canalized Phonon Polaritons.

Autor: Obst M; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany., Nörenberg T; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany., Álvarez-Pérez G; Department of Physics, University of Oviedo, Oviedo 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology CINN (CSIC-Universidad de Oviedo), El Entrego 33940, Spain., de Oliveira TVAG; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany.; Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany., Taboada-Gutiérrez J; Department of Quantum Matter Physics, Université de Genève, 24 Quai Ernest Ansermet, CH-1211, Geneva, Switzerland., Feres FH; Gleb Wataghin Physics Institute, University of Campinas (Unicamp), Campinas, Sao Paulo 13083-859, Brazil.; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo 13083-100, Brazil., Kaps FG; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany., Hatem O; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany.; Department of Engineering Physics and Mathematics, Faculty of Engineering, Tanta University, Tanta 31511, Egypt., Luferau A; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany., Nikitin AY; Donostia International Physics Center (DIPC), Donostia/San Sebastián 20018, Spain.; IKERBASQUE, Basque Foundation for Science, Bilbao 48013, Spain., Klopf JM; Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany., Alonso-González P; Department of Physics, University of Oviedo, Oviedo 33006, Spain.; Center of Research on Nanomaterials and Nanotechnology CINN (CSIC-Universidad de Oviedo), El Entrego 33940, Spain., Kehr SC; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany., Eng LM; Institut für Angewandte Physik, Technische Universität Dresden, Dresden 01187, Germany.; Würzburg-Dresden Cluster of Excellence - EXC 2147 (ct.qmat), Dresden 01062, Germany.; Collaborative Research Center 1415, Technische Universität Dresden, Dresden 01069, Germany.

Publikováno v: ACS nano [ACS Nano] 2023 Oct 10; Vol. 17 (19), pp. 19313-19322. Date of Electronic Publication: 2023 Sep 22.