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Topological high-harmonic spectroscopy

التفاصيل البيبلوغرافية
العنوان: Topological high-harmonic spectroscopy
المؤلفون: Ana García-Cabrera, Roberto Boyero-García, Óscar Zurrón-Cifuentes, Javier Serrano, Julio San Román, Luis Plaja, Carlos Hernández-García
المصدر: Communications Physics, Vol 7, Iss 1, Pp 1-10 (2024)
بيانات النشر: Nature Portfolio, 2024.
سنة النشر: 2024
المجموعة: LCC:Astrophysics
LCC:Physics
مصطلحات موضوعية: Astrophysics, QB460-466, Physics, QC1-999
الوصف: Abstract Linearly polarized vector beams are structured lasers whose topology is characterized by a well-defined Poincaré index, which is a topological invariant during high-order harmonic generation. As such, harmonics are produced as extreme-ultraviolet vector beams that inherit the topology of the driver. This holds for isotropic targets such as noble gases, but analogous behaviour in crystalline solids is still open to discussion. Here, we demonstrate that this conservation rule breaks in crystalline solids, in virtue of their anisotropic non-linear susceptibility. We identify the topological properties of the harmonic field as unique probes, sensitive to both the microscopic and macroscopic features of the target’s complex non-linear response. Our simulations, performed in single-layer graphene, show that the harmonic field is split into a multi-beam structure whose topology encodes information about laser-driven electronic dynamics. Our work promotes the topological analysis of the high-order harmonic field as a spectroscopic tool to reveal the nonlinearities in the coupling of light and target symmetries.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2399-3650
Relation: https://doaj.org/toc/2399-3650
DOI: 10.1038/s42005-023-01511-7
URL الوصول: https://doaj.org/article/0f72ada2aa4b4787b77d66a14ec22058
رقم الانضمام: edsdoj.0f72ada2aa4b4787b77d66a14ec22058
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:23993650
DOI:10.1038/s42005-023-01511-7