Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Attosecond Science
A 22.4: Vortrag
Mittwoch, 8. März 2017, 15:30–15:45, N 2
Localized High-Harmonic Generation in Semiconductor Nanostructures — •Murat Sivis1,2, Marco Taucer2, Kyle Johnston2, Giulio Vampa2, André Staudte2, Andrei. Yu. Naumov2, David. M. Villeneuve2, Paul B. Corkum2, and Claus Ropers1 — 14th Physical Institute - Solids and Nanostructures, Georg-August University, Göttingen, Germany — 2Joint Attosecond Science Laboratory, National Research Council of Canada and University of Ottawa, Ottawa, Canada.
High-harmonic generation (HHG) in solid-state systems, as recently demonstrated in semiconductors1−3, enables the transfer of gas-phase attosecond spectroscopy techniques to condensed matter. In general, HHG is sensitive to the electronic structure of the generation medium and the local driving laser field. Both of these properties can be routinely tailored in solids by modifying the chemical composition and the microstructure. Here, we study HHG in nanostructured zinc oxide and silicon crystals. We use wavelength-selective microscopic imaging to characterize the harmonics (at 2 µm driving wavelength) and find enhanced emission in nanofabricated grating structures as well as in gallium-implanted patterns. Our results illustrate novel means to control HHG and to use the harmonic emission as a unique local probe to investigate structural, chemical or electronic dynamics in solid-state systems.
1S. Ghimire et al. Nat. Phys. 7, 138-141 (2011).
2O. Schubert et al. Nat. Photon. 8, 119-123 (2014).
3G. Vampa et al. Nature 522, 462-464 (2015).