Influence of Coulomb correlations on high harmonic generation in monolayer TMDCs

Jörg Hader; Josefine Neuhaus; Jerome V. Moloney; Stephan W. Koch

doi:10.1117/12.2655642

17 March 2023 Influence of Coulomb correlations on high harmonic generation in monolayer TMDCs

Jörg Hader, Josefine Neuhaus, Jerome V. Moloney, Stephan W. Koch

Proceedings Volume 12423, 2D Photonic Materials and Devices VI; 1242306 (2023) https://doi.org/10.1117/12.2655642
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We use microscopic many-body models based on first principle density functional theory to investigate the high harmonic generation (HHG) in monolayer transition metal dichalcogenides (ML-TMDCs) at the example of MoS₂. A two-dimensional bandstructure model is utilized that allows for the realistic inclusion of Coulomb correlations. It is shown that for off-resonant mid-IR excitation Coulomb correlations lead to a dramatic enhancement of HHG intensity by up to two orders of magnitude. For resonant excitation near the fundamental excitonic resonance the Coulomb interaction leads to dressed harmonics. These have a sub-floor of broad spectral contributions. The amplitude of these contributions is about four to six orders of magnitude below the peak. The width scales linearly with the exciting field and can reach hundreds of meV.

Conference Presentation

Citation Download Citation

Jörg Hader, Josefine Neuhaus, Jerome V. Moloney, and Stephan W. Koch "Influence of Coulomb correlations on high harmonic generation in monolayer TMDCs", Proc. SPIE 12423, 2D Photonic Materials and Devices VI, 1242306 (17 March 2023); https://doi.org/10.1117/12.2655642

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