Patent ID: 11860502
Assignee: FUNDACIÓ INSTITUT DE CIÈNCIES FOTÒNIQUES
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. The electro-optical modulator according to claim 16, further comprising:
a further bottom graphene sheet arranged and extending, along the X-direction, over at least a portion of the upper face of the semiconductor substrate and over at least a portion of the second optical waveguide branch;
a further sheet of said first dielectric material extending along the X-direction over the further bottom graphene sheet);
a further top graphene sheet arranged and extending along said X-direction over at least a portion of the further sheet of said first dielectric material and over at least a portion of the second optical waveguide branch; and
further portions of the second dielectric material covering upper and bottom faces of said further top graphene sheet and/or an upper face or upper and bottom faces of said further bottom graphene sheet;
wherein at least one of said further top and further bottom graphene sheets extends along said X-direction:
above part of the width of the second optical waveguide branch, wherein said part ranges from 50% to 100% of the width of the second optical waveguide branch; or
completely above the whole width of the second optical waveguide branch, and beyond through a respective further projecting portion with a length, along the X direction, of up to 25% of the width of the second optical waveguide branch.