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August 16, 2026PhotonicsOpen Access

Comprehensive Numerical Investigation of CO2-Laser-Driven Terahertz Generation in GaP and ZnTe Crystals

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Authors

GNGabit NazymbekovGPGyula PolónyiLNLuis Nasi

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Overview

Simulation study demonstrates terahertz conversion efficiency exceeding one percent with high pulse quality in ZnTe over GaP, highlighting optimal strategies for mid-infrared-driven sources.

Key Points

  • Investigate the intrinsic performance limits, conversion efficiencies, and pulse dynamics of terahertz generation in GaP and ZnTe semiconductor crystals pumped by 10.6 µm ultrafast CO2 lasers.
  • Implemented a one-plus-one-dimensional (1+1D) frequency-domain numerical propagation model.
  • Modeled optical rectification, cascaded nonlinear interactions, self-phase modulation, second-harmonic generation, and pulse-front-tilt dispersion under conditions where low-order multiphoton absorption is suppressed.
  • ZnTe achieved optical-to-terahertz conversion efficiencies exceeding 1% while preserving high terahertz pulse quality.
  • GaP demonstrated strong self-phase modulation and nonlinear pulse compression that increased efficiency at the expense of waveform distortion and elevated crystal damage risk.
  • Both crystal types generated megavolt-per-centimeter (MV/cm) peak terahertz electric fields, with ZnTe providing the superior trade-off between pulse quality and efficiency.

Cite This Study

Nazymbekov et al. (2026) studied this question.

synapsesocial.com/papers/6a8179cbf2fb91fc834ad205https://doi.org/10.3390/photonics13080766
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Also Consider

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  1. 1Enhanced Terahertz Emission from the Wakefield of CO2 Laser-Created Plasma2024
  2. 2Tunable Terahertz Generation in Dispersion‐Engineered ZnTe Waveguides2026
  3. 3Comparison of second harmonic generation efficiency of orientation patterned GaAs, CdGeAs2, ZnGeP2 and AgGaSe2 using a pulsed CO2 laser2024
  4. 4Extreme Terahertz Nonlinearity of AlGaN/GaN-based Grating-Gate Plasmonic Crystals2025
  5. 5Design and Fabrication of Antireflective Coatings with Enhanced Transmittance and High Laser-Induced Damage Threshold for ZnGeP<sub>2</sub> Mid-Infrared Crystals2025 · 3 citations