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Domain inversion in MgO-diffused LiNbO(3).

W Y Hsu, M C Gupta

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    |September 8, 2010
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    Summary
    This summary is machine-generated.

    Researchers patterned MgO on lithium niobate (LiNbO3) and used lithium outdiffusion to create periodic domain inversion. This method yields 1.5-micrometer domain inversion lines, suitable for fabricating gratings for efficient nonlinear optics.

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    Area of Science:

    • Materials Science
    • Solid State Physics
    • Nonlinear Optics

    Background:

    • Lithium niobate (LiNbO3) is a key material for nonlinear optical applications.
    • Achieving periodic domain inversion in LiNbO3 is crucial for devices like quasi-phase-matched gratings.
    • Existing methods for domain inversion can be complex or limited in resolution.

    Purpose of the Study:

    • To develop a novel method for creating periodic domain inversion in LiNbO3.
    • To achieve precise control over domain inversion patterns and depths.
    • To assess the suitability of the fabricated structures for nonlinear optical applications.

    Main Methods:

    • Patterning of magnesium oxide (MgO) on the positive C-face of LiNbO3.
    • Lithium (Li) outdiffusion process induced by heat treatment at 1000°C for 2 hours.
    • Characterization of domain inversion lines with a width of 1.5 micrometers and a depth of 1 micrometer.

    Main Results:

    • Successfully obtained periodic domain inversion with well-defined lines.
    • Achieved domain inversion lines of 1.5 micrometers in width.
    • Demonstrated a controlled inversion depth of 1 micrometer.

    Conclusions:

    • The MgO patterning and Li outdiffusion technique effectively creates periodic domain inversion in LiNbO3.
    • The resulting domain inversion lines are suitable for fabricating first-order gratings.
    • This method offers a promising route for efficient quasi-phase-matched nonlinear optical devices, particularly for high second-harmonic generation.