Abstract
As an advanced ferroelectric material, barium titanate (BaTiO 3 ) crystal has an electro-optic effect higher than lithium niobate (LiNbO 3 ) crystal by 20-40 times, so it has been taken to be one of the best materials to realize the ultra-high bandwidth electro-optic modulators. In this paper, we model and simulate the transmission coefficient S 21 of the microwave signal to the frequency of drive microwave through an embedded waveguide-electrode structure, and further simulate the S 21 with a software tool - Sonnet. As a result, when the electrode length, electrode width, electrode thickness, electrode gap, BaTiO 3 thin film thickness, magnesium oxide (MgO) substrate thickness and embedded depth were 1mm, 80μm, 1μm, 8μm, 450nm, 500μm and 0.1μm, respectively, the electro-optic modulation bandwidths have reached 50-70GHz, and it can be optimized to 100GHz at 250μm MgO substrate thickness.
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