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Periodically poled BaMgF(4) for ultraviolet frequency generation.

S C Buchter, T Y Fan, V Liberman

    Optics Letters
    |December 1, 2007
    PubMed
    Summary
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    Ferroelectric domain inversion is now possible in Barium Magnesium Fluoride (BaMgF4). This material shows exceptional transparency and stability, enabling advanced nonlinear optical applications at shorter wavelengths.

    Area of Science:

    • Materials Science
    • Nonlinear Optics
    • Solid-State Physics

    Background:

    • Barium Magnesium Fluoride (BaMgF4) is a crystalline material with potential nonlinear optical properties.
    • Achieving ferroelectric domain inversion is crucial for applications like quasi-phase-matching in nonlinear optics.
    • Previous research has not demonstrated domain inversion in BaMgF4.

    Purpose of the Study:

    • To demonstrate ferroelectric domain inversion in BaMgF4.
    • To evaluate the optical transparency and laser-induced damage threshold of BaMgF4 at deep ultraviolet (DUV) wavelengths.
    • To explore the potential of BaMgF4 for nonlinear optical frequency conversion.

    Main Methods:

    • Ferroelectric domain inversion was induced in BaMgF4 crystals.
    • Optical transmission measurements were performed down to <140 nm.

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  • BaMgF4 samples were irradiated with 157-nm laser pulses to assess laser-induced damage threshold.

    • Main Results:

    • Ferroelectric domain inversion was successfully demonstrated in BaMgF4.
    • The material exhibits transparency below 140 nm.
    • BaMgF4 showed no change in transmission after >1.1x10^9 shots at 2 mJ/cm^2 per pulse at 157 nm.
    • First-order quasi-phase-matched generation of 157 nm is predicted using grating periods as long as 1.5 μm.

    Conclusions:

    • BaMgF4 is a promising material for nonlinear optical applications.
    • Its demonstrated domain invertibility and DUV transparency/stability surpass existing crystalline materials.
    • BaMgF4 could enable shorter-wavelength chi((2)) frequency-mixing processes.