Phonon dynamics in nonlinear optics via perturbation approach: Hexagonal Boron Nitride

Kazempour, Ali

doi:10.30473/jphys.2025.73451.1230

Document Type : Research

Author

Ali Kazempour

Associate Professor, Department of Physics, Payame Noor University, Tehran, Iran.

https://doi.org/10.30473/jphys.2025.73451.1230

Abstract

In the context of strong field-matter interaction, an increasing number of phenomena have emerged that can be well understood when taking into account the vibrational modes of lattice i.e., phonons. Phonons dynamics as a result of coupling between electronic and lattice degree of freedom has substantial effect on transient features via redistribution of quasiparticle populations and dynamical modification of coupling strength. In this study, we resolve the role of nonlinear phononics in nonlinear optics phenomena such as second harmonic generation and shift current including phonons for series of 2D materials. Our results show strong dynamical modulation of the electron-phonon effect in the dynamical Born effective charge for all individual phonon modes. The presence of activated phonons also enhances the second-order terms of second harmonic generation and shift current. The parameter amplification of light by nonlinear phonons enhance the control over phonon-polariton waves, interesting for information transport on subwavelength length scales.

Keywords

References

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Quarterly Journal of Optoelectronic

Phonon dynamics in nonlinear optics via perturbation approach: Hexagonal Boron Nitride

References

References

Volume 8, Issue 3 - Serial Number 24
May 2026
Pages 19-24

Phonon dynamics in nonlinear optics via perturbation approach: Hexagonal Boron Nitride

References

References

Volume 8, Issue 3 - Serial Number 24May 2026Pages 19-24

Volume 8, Issue 3 - Serial Number 24
May 2026
Pages 19-24