| 摘要 |
The electro-optic element comprises a first waveguide which is a plasmonic waveguide comprising: a first core comprising a ferroelectric material; and a cladding comprising a first cladding portion comprising, at a first interface with the ferroelectric material, a first cladding material having a permittivity having a negative real part; the element comprising a first and a second electrode for producing an electric field in the ferroelectric material when a voltage is applied between the first and second electrodes, for modulating at least a real part of a refractive index of the ferroelectric material. The element comprises, in addition, a crystalline substrate on which the ferroelectric material is epitaxially grown with zero or one or more intermediate layers present between the substrate and the ferroelectric material. The element may comprise a second waveguide which is a photonic waveguide comprising a second core positioned in proximity to the first waveguide for enabling evanescent coupling between the first and second waveguides. |
