<div class="csl-bib-body">
<div class="csl-entry">Seres, J., Seres, E., Céspedes, E., Martínez de Olcoz, L., Zabala, M., & Schumm, T. (2023). Nonperturbative Generation of Harmonics by Nanometer-Scale Localized Electronic States on the Surface of Bulk Materials and Nano-Films. <i>Optics</i>, <i>4</i>(1), 246–257. https://doi.org/10.3390/opt4010017</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/176573
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dc.description.abstract
The generation of high-order harmonics in solid crystals has received considerable attention recently. Using a driver laser with 0.8 µm wavelength and 28 fs ultrashort pulses, we present experimental results, accompanied with theoretical considerations, suggesting that the actual sources of the harmonics are nanometer-sized localized and transient electronic states on the surface of the materials when the laser intensity is in the non-perturbative regime. Adaptation of the bond model of the harmonic generation into the non-perturbative regime and including the quantum features of the process provide a localized excitation approach that correctly describes the measured polarization dependence of the harmonic signal, reflecting the microscopic surface structure and symmetries of the examined materials.
en
dc.language.iso
en
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dc.publisher
MDPI
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dc.relation.ispartof
Optics
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dc.subject
high harmonic generation
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dc.subject
light–matter interaction
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dc.subject
nano-films
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dc.title
Nonperturbative Generation of Harmonics by Nanometer-Scale Localized Electronic States on the Surface of Bulk Materials and Nano-Films