Patent ID: 8582929

Claim:
An electric field detection device, comprising: an interferometer having a reference arm and an active arm, wherein the reference arm comprises a first electro-optic (EO) waveguide, and wherein the active arm comprises: (a) a first metallic plate; (b) a second metallic plate spaced apart from the first metallic plate defining a first gap therebetween; (c) a third metallic plate disposed in the first gap and vertically extending from the first metallic plate to define a T-shape structure and a second gap between the third metallic plate and the second metallic plate, wherein the second gap is substantially smaller than the first gap; (d) a second electro-optic waveguide disposed in the second gap, wherein the second electro-optic waveguide comprises: (i) a waveguide layer; (ii) a first cladding layer disposed between the third metallic plate and the waveguide layer; and (iii) a second cladding layer disposed between the waveguide layer and the second metallic plate; and (e) a dielectric layer disposed in the first gap and surrounding the third metallic plate and the second electro-optic waveguide, wherein the second electro-optic waveguide is in electrical communication with the third metallic plate and the second metallic plate, respectively.