Quasiparticle effects on the linear and nonlinear susceptibility of ZnGeP<sub>2</sub>

Xie, Hua; Fang, Shenghao; Zhao, He; Xu, Xiaoliang; Ye, Ning; Zhuang, Wei

doi:10.1039/c9ra08172k

Cited by 3 publications

(1 citation statement)

References 46 publications

(52 reference statements)

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“…1 a, which contains four Zn atoms, four Ge atoms, and eight P atoms 18 . The ZnGeP 2 unit cell lattice exhibits a tetragonal crystal system, being defined by the dimensions of 10.766 Å along the [001] axis and 5.465 Å along the [100] and [010] axes 19 . As seen from Fig.…”

Section: Crystal Characteristics and Nonlinear Propertiesmentioning

confidence: 99%

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Carnio

Zawilski

Schunemann

et al. 2023

Sci Rep

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The highly-nonlinear chalcopyrite crystal family has experienced remarkable success as source crystals in the mid-infrared spectral range, such that these crystals are primary candidates for producing high terahertz frequency (i.e., $$\gtrsim$$ ≳ 10 THz) electric fields. A phase-resolved terahertz electric field pulse is produced via intra-pulse difference frequency generation in a chalcopyrite (110) ZnGeP2 crystal, with phase-matching being satisfied by the excitation electric field pulse having polarizations along both the ordinary and extraordinary crystal axes. While maximum spectral power is observed at the frequency of 24.5 THz (in agreement with intra-pulse phase-matching calculations), generation nonetheless occurs across the wide spectral range of 23–30 THz. To our knowledge, this is the first time a chalcopyrite ZnGeP2 crystal has been used for the generation of phase-resolved high-frequency terahertz electric fields.

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Section: Crystal Characteristics and Nonlinear Propertiesmentioning

confidence: 99%

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Carnio

Zawilski

Schunemann

et al. 2023

Sci Rep

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Surface hopping dynamics in periodic solid-state materials with a linear vibronic coupling model

Xie

Wang

et al. 2022

The Journal of Chemical Physics

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We report a surface hopping approach in which the implemented linear vibronic coupling Hamiltonian is constructed and the electronic wavefunction is propagated in the reciprocal space. The parameters of the linear vibronic coupling model, including onsite energies, phonon frequencies, and electron-phonon couplings, are calculated with density-functional theory and density-functional perturbation theory, and interpolated in fine sampling points of the Brillouin zone with maximally localized Wannier functions. Using this approach, we studied the relaxation dynamics of the photo-excited hot carrier in a one-dimensional periodic carbon chain. The results show that the completeness of the number of Hilbert space k-points and the number of phonon q-points play important roles in the hot carrier relaxation processes. By calculating the relaxation times of hot carriers under different reciprocal space sampling and extrapolating with the stretched-compressed exponential function, the relaxation times of hot electrons and holes in the quasi-continuous energy band are obtained. By considering the feedback effect in the hopping processes and analyzing the time-dependent phonon energy in different normal modes, we found that the long-wave longitudinal optical phonons play a major role in the relaxation dynamics of hot electrons and holes. We therefore provided herein an efficient and accurate approach for modeling the photophysical processes in periodic solid-state material systems.

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Rb₂MGe₃S₈ (M=Zn, Cd): Non-Centrosymmetry Transformation Led by Structure Change of [MGe₃S₈]^2- Unit^※

Chai¹,

Chen²,

Yan³

et al. 2022

Acta Chimica Sinica

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Quasiparticle effects on the linear and nonlinear susceptibility of ZnGeP₂

Abstract: The semiconductor zinc germanium diphosphide (ZnGeP2) has wide applications in the infrared nonlinear optics (NLO) due to its high nonlinear optical coefficient, wide infrared transparency range and high thermal conductivity.

Cited by 3 publications

References 46 publications

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Surface hopping dynamics in periodic solid-state materials with a linear vibronic coupling model

Rb₂MGe₃S₈ (M=Zn, Cd): Non-Centrosymmetry Transformation Led by Structure Change of [MGe₃S₈]^2- Unit^※

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Quasiparticle effects on the linear and nonlinear susceptibility of ZnGeP2

Abstract: The semiconductor zinc germanium diphosphide (ZnGeP2) has wide applications in the infrared nonlinear optics (NLO) due to its high nonlinear optical coefficient, wide infrared transparency range and high thermal conductivity.

Cited by 3 publications

References 46 publications

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

Surface hopping dynamics in periodic solid-state materials with a linear vibronic coupling model

Rb2MGe3S8 (M=Zn, Cd): Non-Centrosymmetry Transformation Led by Structure Change of [MGe3S8]2- Unit※

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Quasiparticle effects on the linear and nonlinear susceptibility of ZnGeP₂

Rb₂MGe₃S₈ (M=Zn, Cd): Non-Centrosymmetry Transformation Led by Structure Change of [MGe₃S₈]^2- Unit^※