Domain inversion in MgO-diffused LiNbO(3).
We obtain the periodic modulation of domain polarization by patterning MgO on the positive C-face of LiNbO(3), followed by Li outdiffusion to induce domain inversion. We obtain domain inversion lines (1.5 microm) by heat treating LiNbO(3) at 1000 degrees C for 2 h with a 1-microm inversion depth. This process may be suitable for fabrication of first-order gratings that are needed for high second-harmonic conversion efficiency by using a quasi-phase-matched technique.
Hsu
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Gupta
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