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Multiphoton Resonant Excitation and High Harmonic Generation in Large Graphene Quantum Dots.

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Title: Multiphoton Resonant Excitation and High Harmonic Generation in Large Graphene Quantum Dots.
Authors: Sedrakian, Kh. V.1 (AUTHOR), Ghazaryan, A. G.1 (AUTHOR) amarkos@ysu.am, Markosyan, A. A.2 (AUTHOR)
Source: JETP Letters. May2026, Vol. 123 Issue 10, p674-681. 8p.
Subjects: Harmonic generation, Multiphoton absorption, Electromagnetic interactions, Electrostatic interaction, Spectrum analysis, Quantum theory, Graphene
Abstract: We investigated the generation of higher harmonics in large graphene quantum dots under the effect of an intense laser field. Modeling a hexagonal graphene quantum dots with zigzag edges consisting of 150 atoms and its interaction with a laser field, we use the tight-binding approximation to account for the many-particle Coulomb interaction. Our detailed spectral analysis reveals the multiphoton resonant nature of the harmonic generation, shedding light on the underlying quantum processes. We examined the dependence of the cutoff harmonics on the laser intensity and frequency, providing useful insights into the optimal conditions for enhancing the generation of higher harmonics in a large graphene quantum dot. The obtained results indicated that a graphene quantum dot with 150 atoms exhibits a significant increase in high harmonic emission compared to the previously discussed graphene quantum dots. [ABSTRACT FROM AUTHOR]
Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 194969684
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="JN" term="%22JETP+Letters%22">JETP Letters</searchLink>. May2026, Vol. 123 Issue 10, p674-681. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Harmonic+generation%22">Harmonic generation</searchLink><br /><searchLink fieldCode="DE" term="%22Multiphoton+absorption%22">Multiphoton absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+interactions%22">Electromagnetic interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Electrostatic+interaction%22">Electrostatic interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink>
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  Data: We investigated the generation of higher harmonics in large graphene quantum dots under the effect of an intense laser field. Modeling a hexagonal graphene quantum dots with zigzag edges consisting of 150 atoms and its interaction with a laser field, we use the tight-binding approximation to account for the many-particle Coulomb interaction. Our detailed spectral analysis reveals the multiphoton resonant nature of the harmonic generation, shedding light on the underlying quantum processes. We examined the dependence of the cutoff harmonics on the laser intensity and frequency, providing useful insights into the optimal conditions for enhancing the generation of higher harmonics in a large graphene quantum dot. The obtained results indicated that a graphene quantum dot with 150 atoms exhibits a significant increase in high harmonic emission compared to the previously discussed graphene quantum dots. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S0021364026600874
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 674
    Subjects:
      – SubjectFull: Harmonic generation
        Type: general
      – SubjectFull: Multiphoton absorption
        Type: general
      – SubjectFull: Electromagnetic interactions
        Type: general
      – SubjectFull: Electrostatic interaction
        Type: general
      – SubjectFull: Spectrum analysis
        Type: general
      – SubjectFull: Quantum theory
        Type: general
      – SubjectFull: Graphene
        Type: general
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      – TitleFull: Multiphoton Resonant Excitation and High Harmonic Generation in Large Graphene Quantum Dots.
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              M: 05
              Text: May2026
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              Y: 2026
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