西亚试剂：Attosecond spectroscopy in condensed matter

发布时间：2026-02-26

Attosecond spectroscopy in condensed matter

A. L. Cavalieri1, N. Müller2, Th. Uphues1,2, V. S. Yakovlev3, A. Baltu s caron ka1,4, B. Horvath1, B. Schmidt5, L. Blümel5, R. Holzwarth5, S. Hendel2, M. Drescher6, U. Kleineberg3, P. M. Echenique7, R. Kienberger1, F. Krausz1,3 & U. Heinzmann2

Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
Department für Physik, Ludwig-Maximilians-Universität, Am Coulombwall 1, D-85748 Garching, Germany
Institut für Photonik, Technische Universität Wien, Guhausstr. 27, A-1040 Wien, Austria
Menlo Systems GmbH, Am Klopferspitz 19, D-82152 Martinsried, Germany
Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
Dpto. Fisica de Materiales UPV/EHU, Centro Mixto CSIC-UPV/EHU and Donostia International Physics Center (DPIC), Paseo Manual de Lardizabal 4, 20018 San Sebastian, Spain

Correspondence to: A. L. Cavalieri1F. Krausz1,3U. Heinzmann2 Correspondence and requests for materials should be addressed to A.L.C. (Email: adrian.cavalieri@mpq.mpg.de) or F.K. (Email: krausz@lmu.de) or U.H. (Email:).

Abstract

Comprehensive knowledge of the dynamic behaviour of electrons in condensed-matter systems is pertinent to the development of many modern technologies, such as semiconductor and molecular electronics, optoelectronics, information processing and photovoltaics. Yet it remains challenging to probe electronic processes, many of which take place in the attosecond (1 as = 10-18 s) regime. In contrast, atomic motion occurs on the femtosecond (1 fs = 10-15 s) timescale and has been mapped in solids in real time1, 2 using femtosecond X-ray sources3. Here we extend the attosecond techniques4, 5 previously used to study isolated atoms in the gas phase to observe electron motion in condensed-matter systems and on surfaces in real time. We demonstrate our ability to obtain direct time-domain access to charge dynamics with attosecond resolution by probing photoelectron emission from single-crystal tungsten. Our data reveal a delay of approximately 100 attoseconds between the emission of photoelectrons that originate from localized core states of the metal, and those that are freed from delocalized conduction-band states. These results illustrate that attosecond metrology constitutes a powerful tool for exploring not only gas-phase systems, but also fundamental electronic processes occurring on the attosecond timescale in condensed-matter systems and on surfaces.

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