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  Enhancement of high-order harmonic generation in graphene by mid-infrared and terahertz fields

Mao, W., Rubio, A., & Sato, S. (2024). Enhancement of high-order harmonic generation in graphene by mid-infrared and terahertz fields. Physical Review B, 109(4): 045421. doi:10.1103/PhysRevB.109.045421.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-7496-7 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-40A2-2
Genre: Journal Article

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PhysRevB.109.045421.pdf (Publisher version), 2MB
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© the Author(s). Published by the American Physical Society.
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https://arxiv.org/abs/2306.17346 (Preprint)
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https://doi.org/10.1103/PhysRevB.109.045421 (Publisher version)
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 Creators:
Mao, W.1, 2, Author           
Rubio, A.1, 2, 3, Author           
Sato, S.1, 2, 4, Author           
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free-Electron Laser Science, ou_persistent22              
3Center for Computational Quantum Physics, Flatiron Institute, ou_persistent22              
4Center for Computational Sciences, University of Tsukuba, ou_persistent22              

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 Abstract: We theoretically investigate high-order harmonic generation (HHG) in graphene under mid-infrared (MIR) and terahertz (THz) fields based on a quantum master equation. Numerical simulations show that MIR-induced HHG in graphene can be enhanced by a factor of 10 for fifth harmonic and a factor of 25 for seventh harmonic under a THz field with a peak strength of 0.5 MV/cm by optimizing the relative angle between the MIR and THz fields. To identify the origin of this enhancement, we compare the fully dynamical calculations with a simple thermodynamic model and a nonequilibrium population model. The analysis shows that the enhancement of the high-order harmonics mainly results from a coherent coupling between MIR- and THz-induced transitions that goes beyond a simple THz-induced population contribution.

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Language(s): eng - English
 Dates: 2023-12-202023-06-302023-12-212024-01-172024-01-15
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: arXiv: 2306.17346
DOI: 10.1103/PhysRevB.109.045421
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Project name : The authors acknowledge fruitful discussions with K. Nakagawa, H. Hirori, and Y. Kanemitsu. This work was supported by JSPS KAKENHI Grants No. JP20K14382 and No. JP21H01842, the Cluster of Excellence “CUI: Advanced Imaging of Matter”EXC 2056 Project ID 390715994, and the Max Planck-New York City Center for Non-Equilibrium Quantum Phenomena. The Flatiron Institute is a division of the Simons Foundation. This work used computational resources of the HPC systems at the Max Planck Computing and Data Facility (MPCDF) and the Fujitsu PRIMERGY CX400M1/CX2550M5 (Oakbridge-CX) at the Information Technology Center, The University of Tokyo through the HPCI System Research Project (Project ID:hp220112). Open access publication funded by the Max Planck Society.
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 109 (4) Sequence Number: 045421 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008