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Updated: Jun 22, 2026

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Cubic parametric frequency generation in rutile single crystal.

Fabien Gravier, Benoît Boulanger

    Optics Express
    |June 17, 2009
    PubMed
    Summary

    We explored third harmonic generation in titanium dioxide (TiO2) rutile crystals. This research demonstrates rutile

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    Area of Science:

    • Nonlinear optics
    • Solid-state physics
    • Materials science

    Background:

    • Third harmonic generation (THG) is a key nonlinear optical process.
    • Titanium dioxide (TiO2) rutile is a promising material for nonlinear optics.
    • Efficient THG requires precise phase-matching conditions.

    Purpose of the Study:

    • To experimentally investigate THG in TiO2 rutile single crystals.
    • To determine phase-matching properties and cubic nonlinearity of rutile.
    • To compare rutile's performance with established nonlinear materials like KTiOPO4.

    Main Methods:

    • Experimental setup for THG measurements.
    • Refinement of rutile dispersion equations.
    • Calculation of nonlinear optical coefficients and Miller coefficients.

    Main Results:

    • Demonstrated angular non-critical phase-matching in rutile at useful wavelengths.
    • Rutile exhibits a figure of merit 7.5 times higher than KTiOPO4.
    • Measured nonlinear coefficient chi(16) = 5.0x10(-21) m(2/)V(2) and Delta16 = 3.5x10(-24) m(2/)V(2).

    Conclusions:

    • Rutile is a highly efficient material for THG.
    • The refined dispersion equations and measured coefficients enable prediction of THG efficiency.
    • Rutile shows significant potential for applications in photon generation.

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