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Updated: Jul 6, 2026

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Electron-Beam Poling on Ti:LiNbO(3).

C Restoin, C Darraud-Taupiac, J L Decossas

    Applied Optics
    |March 28, 2008
    PubMed
    Summary

    Electron-beam bombardment achieves periodic domain inversion in Ti:LiNbO(3) with high-resolution gratings. This study explains the domain inversion phenomenon and demonstrates quasi-phase-matched second-harmonic generation.

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    Area of Science:

    • Materials Science
    • Optoelectronics
    • Nonlinear Optics

    Background:

    • Periodic domain structures are crucial for nonlinear optical devices.
    • Electron-beam (EB) bombardment offers a potential method for fabricating these structures.
    • Understanding the EB-induced domain inversion mechanism in lithium niobate (LiNbO3) is essential for device optimization.

    Purpose of the Study:

    • To demonstrate periodic domain inversion in Ti:LiNbO3 using direct EB bombardment.
    • To investigate the influence of EB parameters on the domain inversion process.
    • To achieve quasi-phase-matched second-harmonic generation (SHG) in bulk LiNbO3.

    Main Methods:

    • Direct electron-beam (EB) bombardment on Ti:LiNbO3 substrates.
    • Fabrication of gratings with a 6.6-micrometer period.

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  • Chemical etching and scanning electron microscopy (SEM) for pattern visualization.
  • Systematic variation of EB parameters (e.g., dose, energy).
  • Quasi-phase-matched second-harmonic generation experiments using a Nd:YAG laser.

    • Main Results:

    • Achieved periodic domain inversion with a 6.6-micrometer period in Ti:LiNbO3.
    • Observed high-resolution inverted patterns after chemical etching via SEM.
    • Detailed the influence of EB parameters on domain inversion in both LiNbO3 and Ti:LiNbO3.
    • Successfully demonstrated quasi-phase-matched second-harmonic generation in bulk LiNbO3.

    Conclusions:

    • Direct EB bombardment is an effective technique for creating periodic domain structures in Ti:LiNbO3.
    • The study provides insights into the underlying physics of EB-induced domain inversion.
    • The demonstrated SHG confirms the utility of EB-patterned LiNbO3 for nonlinear optical applications.