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US 2018/0246350 A1Published application
Graphene-based plasmonic slot electro-optical modulator
AssigneeThe George Washington University
InventorsZhizhen MA, Volker J. SORGER
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Abstract
An electro-optical modulator using a graphene-based plasmonic slot is disclosed. The electro-optical modulator is comprised of a substrate layer, a dielectric spacer, a graphene layer, a first metal layer, and a second metal layer. The metal layers create a plasmonic slot that modulates between a light absorptive and light transparent state depending on the application of voltage across the modulator. Two or four graphene layers may be used to reduce power consumption and the size of the modulator.
Claims14
An electro-optical modulator comprised of:
- a substrate layer;
- a first contact and a second contact disposed on the substrate layer;
- a dielectric spacer disposed on the substrate layer;
- a first graphene layer disposed on the dielectric spacer;
- a first metal layer and a second metal layer disposed on the graphene layer, forming a plasmonic slot;
- wherein, when a gating voltage is applied across the dielectric spacer and the graphene layer, the plasmonic slot modulates between a state of light absorption and light transparency.
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An electro-optical modulator comprising:
- a substrate;
- a first graphene layer positioned on the substrate and having a first contact;
- a dielectric spacer positioned on the first graphene layer;
- a second graphene layer positioned on the dielectric layer spaced from the first graphene layer, said second graphene layer having a second contact;
- and
- a first block and a second block positioned on the second graphene layer and having an optical waveguide slot therebetween, whereby a gating voltage is applied across the first contact and the second contact to control an optical signal passing through the optical waveguide slot.
3 more elements
Dependencies are inferred from the claim text.