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Electro-optic (EO) modulators based on polymer-embedded silicon racetrack resonators (EOM-PSRR) are investigated. To obtain the single-mode propagation condition, the mode and transmission characteristics of the polymer-embedded silicon waveguide are simulated by the finite element method (FEM). By adding a static bias voltage, the EO modulation performances of EOM-PSRR embedded with lithium niobate ( L i N b O 3 ), EO polymer (AJ309), and hybrid EO p o l y m e r / T i O 2 material (HEOT) are studied. The results show that the EOM-PSRR embedded with L i N b O 3 achieves a high modulation depth (MD) of ∼ 27.6 d B with a low EO wavelength tuning ( λ E O ) of 10 pm/V. However, the EOM-PSRR embedded with HEOT has a high λ E O of 100 pm/V but a low MD of ∼ 6.2 d B with an extinction ratio of ∼ 5.2 d B . The EOM-PSRR has potential application prospects in optical communication, optical signal processing, and optical network links. It can be produced as an optical frequency comb generator in a dense wavelength division multiplexing system, an EO frequency shifter for laser beams, an optical soliton former, and a photon time-delay device in a phased array radar.

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