▎ 摘　　要

NOVELTY - The modulator (100) has a substrate (105) provided with a channel of waveguide material (110). A first insulative layer (115a) is provided on and across an upper surface. A graphene layer is arranged on the first insulative layer, and over a portion of the channel. A second insulative layer (115c) is provided across the graphene layer. The graphene layer provides a first electrode. A non-graphene second electrode is provided on the second insulative layer overlapping the portion, or provided within the substrate underlapping the portion of the channel. USE - Electro-optic modulator for controlling power or amplitude, phase, frequency or polarization of light with electrical control signal used in electronic device. ADVANTAGE - The modulator provides electro-optic modulator with high efficiency and high performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for forming an electro-optic modulator. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of an electro-optic modulator. 100Electro-optic modulator 105Substrate 110Waveguide material 115aFirst insulative layer 115cSecond insulative layer