Regensburg 2025 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 29: Poster II
HL 29.88: Poster
Tuesday, March 18, 2025, 18:00–20:00, P1
All-optical spin injection in silicon investigated by element-specific time-resolved Kerr effect — Simone Laterza1,2, Antonio Caretta1, •Richa Bhardwaj1,3, Roberto Flammini4, Paolo Moras5, Matteo Jugovac5, Piu Rajak6, Mahabul Islam6, Regina Ciancio6, Valentina Bonanni1, Barbara Casarin2, Alberto Simoncig1, Marco Zangrando1,6, Primož R. Ribič1, Giuseppe Penco1, Giovanni De Ninno1, Luca Giannessi1, Alexander Demidovich1, Miltcho Danailov1, Fulvio Parmigiani1, and Marco Malvestuto1,6 — 1Elettra Sincrotrone Trieste, Italy — 2University of Trieste, Italy — 3Institute of Physics and Center for Nanotechnology (CeNTech), University of Münster, 48149 Münster, Germany — 4Istituto di Struttura della Materia-CNR (ISM-CNR), Roma, Italy — 5Istituto di Struttura della Materia-CNR (ISM-CNR), Trieste, Italy — 6Istituto Officina dei Materiali (CNR-IOM), Trieste, Italy
Understanding how a spin current flows across metal-semiconductor interfaces at pico- and femtosecond time scales is of paramount importance for ultrafast spintronics, storage applications etc. However, the possibility to directly access the propagation of spin currents, within such time scales, has been hampered by the simultaneous lack of both ultrafast element-specific magnetic sensitive probes and tailored well-built and characterized metal-semiconductor interfaces. Here, by means of a novel free-electron laser-based element-sensitive ultrafast time-resolved Kerr spectroscopy, we reveal different magnetodynamics for the Ni M2,3 and Si L2,3 absorption edges.
Keywords: time-resolved magnetodynamics; MOKE; ultrafast magnetism