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We design and demonstrate a compact and low-power band-engineeredelectro-optic (EO) polymer refilled silicon slot photonic crystal waveguide(PCW) modulator. The EO polymer is engineered for large EO activity andnear-infrared transparency. A PCW step coupler is used for optimum coupling tothe slow-light mode of the band-engineered PCW. The half-wave switching-voltageis measured to be V{\pi}=0.97+-0.02V over optical spectrum range of 8nm,corresponding to the effective in-device r33 of 1190pm/V and V{\pi} L of0.291+-0.006V mm in a push-pull configuration. Excluding the slow-light effect,we estimate the EO polymer is poled with an efficiency of 89pm/V in the slot.

Wide optical spectrum range, sub-volt, compact modulator based on electro-optic polymer refilled silicon slot photonic crystal waveguide