Presentation + Paper
17 March 2023 Influence of Coulomb correlations on high harmonic generation in monolayer TMDCs
Author Affiliations +
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
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Monolayers

Excitons

High harmonic generation

Polarization

Absorption

Femtosecond phenomena

Semiconductors

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