High-order harmonic generation in hexagonal nanoribbons
Autor: | Dieter Bauer, Christoph Jürß |
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Rok vydání: | 2021 |
Předmět: |
Quantum Physics
Materials science Condensed Matter - Mesoscale and Nanoscale Physics Field (physics) Condensed matter physics Atomic Physics (physics.atom-ph) Graphene Linear polarization FOS: Physical sciences General Physics and Astronomy Polarization (waves) Physics - Atomic Physics law.invention law Harmonics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Harmonic High harmonic generation General Materials Science Physical and Theoretical Chemistry Quantum Physics (quant-ph) Electronic band structure Physics - Optics Optics (physics.optics) |
Zdroj: | The European Physical Journal Special Topics. 230:4081-4089 |
ISSN: | 1951-6401 1951-6355 |
Popis: | The generation of high-order harmonics in finite, hexagonal nanoribbons is simulated. Ribbons with armchair and zig-zag edges are investigated by using a tight-binding approach with only nearest neighbor hopping. By turning an alternating on-site potential off or on, the system describes for example graphene or hexagonal boron nitride, respectively. The incoming laser pulse is linearly polarized along the ribbons. The emitted light has a polarization component parallel to the polarization of the incoming field. The presence or absence of a polarization component perpendicular to the polarization of the incoming field can be explained by the symmetry of the ribbons. Characteristic features in the harmonic spectra for the finite ribbons are analyzed with the help of the band structure for the corresponding periodic systems. Comment: 12 pages, 6 figures |
Databáze: | OpenAIRE |
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