Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 30: Ultrafast Phenomena II

HL 30.5: Talk

Wednesday, March 20, 2024, 11:15–11:30, EW 015

Full calculation of the observable for HHG in solids — •Francisco Navarrete and Dieter Bauer — Institute of Physics, University of Rostock, 18051 Rostock, Germany

When an intense infrared laser interacts with a target, it can produce radiation at frequencies that are multiples of the central frequency of the driving source. This is known as high-harmonic generation (HHG), which was first investigated for atomic and molecular targets [1] and later for condensed matter [2]. The growing attention to explain the impact of the quantum nature of the driving pulse [3], along with the recognized discrepancies between the spectra in HHG in solids obtained from numerical calculations and experiments [4], has encouraged the pursuit of new methods to compute the spectra [5]. In this study, we demonstrate the distinctions in the harmonic spectrum of HHG in solids by comparing the conventional calculation method of the observable [6] with an alternative approach that takes into account typically overlooked terms. Additionally, we examine the underlying physics behind these dissimilarities. [1] M. Lewenstein et al., Phys. Rev. A 49, 2117 (1994) [2] S. Ghimire et al., Nat. Phys. 7, 138 (2011) [3] M. Lewenstein et al., Nat. Phys. 17, 1104 (2021) [4] I. Floss et al., Phys. Rev. A 97, 011401(R) (2018). [5] A. Gorlach et al., Nat Commun 11, 4598 (2020) [6] B. Sundaram and P. W. Milonni, Phys. Rev. A 41, 6571(R) (1990)

Keywords: HHG; high harmonic generation; ultrafast; attoscience; solids