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Dual horizontal slot waveguide EO modulator. (a) Schematic layout of dual nanoslot waveguide, where the middle cut of the waveguide shows three-dimensional rf and optical mode profiles in the middle plane along the waveguide propagation direction. The tightly confined modes in the low index EO polymer infiltrated slot allow the device to experience enhanced nonlinear electro-optic interaction. (b) Cross-sectional view of dual nanoslot waveguide.
Optical and rf mode profiles. (a) Optical electric field distribution at a wavelength of . (b) rf electric field distribution at a frequency of 100 GHz with 1 V applied to the signal electrode. The colorbar scale confirms the field concentration near 2 MV/m within the low index EO polymer infiltrated slot. The dashed box indicates the position of the optical mode as shown in (a).
rf propagation characteristics of dual slot waveguide. (a) rf and optical effective indices and rf attenuation constant. The dashed line indicates the effective optical index of 2.502. (b) Characteristic impedance.
Electro-optical response of the proposed modulators with different modulator lengths of 1 and 2 cm.
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