Tunable high-order harmonic generation in GeSbTe nano-films

High-order harmonic generation (HHG) in solids opens new frontiers in ultrafast spectroscopy of carrier and field dynamics in condensed matter, picometer resolution structural lattice characterization and designing compact platforms for attosecond pulse sources. Nanoscale structuring of solid surfac...

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Bibliographic Details
Published in:Nanophotonics (Berlin, Germany) Germany), 2024-08, Vol.13 (18), p.3411-3419
Main Authors: Korolev, Viacheslav, Sinelnik, Artem D., Rybin, Mikhail V., Lazarenko, Petr, Kushchenko, Olga M., Glukhenkaya, Victoria, Kozyukhin, Sergey, Zuerch, Michael, Spielmann, Christian, Pertsch, Thomas, Staude, Isabelle, Kartashov, Daniil
Format: Article
Language:English
Subjects:
active nonlinear photonics
Amorphous materials
Attosecond pulses
Crystal lattices
Dynamic control
Dynamic structural analysis
Electrons
Emission
GST
Harmonic control
Harmonic generations
high harmonic generation
Lasers
Nanoparticles
Optical control
Optics
phase change material
Phase change materials
Phase transitions
Photonic crystals
Photonics
Solid surfaces
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Summary:High-order harmonic generation (HHG) in solids opens new frontiers in ultrafast spectroscopy of carrier and field dynamics in condensed matter, picometer resolution structural lattice characterization and designing compact platforms for attosecond pulse sources. Nanoscale structuring of solid surfaces provides a powerful tool for controlling the spatial characteristics and efficiency of the harmonic emission. Here we study HHG in a prototypical phase-change material Ge Sb Te (GST). In this material the crystal phase can be reversibly changed between a crystalline and amorphous phase by light or electric current mediated methods. We show that optical phase-switching is fully reversible and allows for dynamic control of harmonic emission. This introduces GST as new addition to materials that enable flexible metasurfaces and photonic structures that can be integrated in devices and allow for ultrafast optical control.
ISSN:2192-8614
2192-8606
2192-8614
DOI:10.1515/nanoph-2023-0859