Erlangen 2022 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 2: Interaction with strong or short laser pulses I

A 2.3: Vortrag

Montag, 14. März 2022, 14:45–15:00, A-H1

Electron dynamical mechanisms for high-harmonic generation in Fibonacci quasicrystals — •Francisco Navarrete and Dieter Bauer — Institut für Physik-Universität Rostock

The mechanism of high-harmonic generation (HHG) in solids has been theoretically studied over the last two decades, and experimentally verified a decade ago [1]. While many conclusions have been drawn for this process in periodic crystals, it has also been predicted a strong dependence of the HHG spectrum on the topology of the sample [2]. Recently, by the study of a Fibonacci chain, it has been demonstrated that quasicrystals might constitute excellent materials for HHG due to their higher yield [3], when compared with crystals of the same composition. In this presentation, we will discuss the electron-dynamics responsible for HHG in Fibonacci quasicrystals when compared to both crystals and amorphous materials. We will describe the crystal-momentum resolved [4] contributions as well as mechanisms that might explain the yield enhancement as well as the parity of the harmonics in each material.

[1] Shambhu Ghimire et al, Nat. Phys. 7, 138(2011)

[2]Christoph Jürß and Dieter Bauer, Phys. Rev. B 99, 195428 (2019)

[3]Jia-Qi Liu and Xue-Bin Bian, Phys. Rev. Lett. 127, 213901 (2021)

[4]Francisco Navarrete, Marcelo F. Ciappina and Uwe Thumm, Phys. Rev. A 100, 033405(2019)