Germanskiy, Semyon ORCID: 0000-0002-5649-2548
(2025).
Nonlinear Terahertz Spectroscopy of the 3D Dirac Material Cd₃As₂.
PhD thesis, Universität zu Köln.
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PDF (Dissertation)
dissertaion.pdf - Published Version Bereitstellung unter der CC-Lizenz: Creative Commons Attribution Non-commercial No Derivatives. Download (19MB) |
Abstract
The thesis investigates the dynamics of quasi-massless electrons in the three-dimensional Dirac material Cd₃As₂ using nonlinear terahertz spectroscopy. It demonstrates that the presence of a Dirac cone in the material enables highly efficient terahertz harmonic generation, and that the generated harmonics depend on the parameters of the driving electric field. Furthermore, it explores how a thickness gradient can break overall inversion symmetry, leading to second harmonic generation. These findings advance our understanding of electron dynamics at the Dirac cone and their role in the nonlinear response of Dirac materials in the terahertz range.
Item Type: | Thesis (PhD thesis) | ||||||||||||
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URN: | urn:nbn:de:hbz:38-782416228 | ||||||||||||
Date: | 2025 | ||||||||||||
Language: | English | ||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences | ||||||||||||
Divisions: | Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II | ||||||||||||
Subjects: | Natural sciences and mathematics Physics |
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Date of oral exam: | 18 February 2025 | ||||||||||||
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Refereed: | Yes | ||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/78241 |
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