Nonlinear co-generation of graphene plasmons for optoelectronic logic operations

TL;DR

This paper demonstrates all-optical generation and electrical control of graphene plasmons using frequency combs, enabling tunable, high-speed optoelectronic logic operations in nanoscale devices.

Contribution

It introduces a novel method for deterministic generation and electrical tuning of graphene plasmons via difference frequency generation in hybrid devices.

Findings

Achieved tunable graphene plasmon responses across 0-50 THz.

Demonstrated electrical control of plasmon phase matching.

Enabled high-speed optoelectronic logic operations.

Abstract

Surface plasmons in graphene provide a compelling strategy for advanced photonic technologies thanks to their tight confinement, fast response and tunability. Recent advances in the field of all optical generation of graphene plasmons in planar waveguides offer a promising method for high speed signal processing in nanoscale integrated optoelectronic devices. Here, we use two counter propagating frequency combs with temporally synchronized pulses to demonstrate deterministic all optical generation and electrical control of multiple plasmon polaritons, excited via difference frequency generation (DFG). Electrical tuning of a hybrid graphene fibre device offers a precise control over the DFG phase matching, leading to tunable responses of the graphene plasmons at different frequencies across a broadband (0 - 50 THz) and provides a powerful tool for high speed logic operations. Our results offer insights for plasmonics on hybrid photonic devices based on layered materials and pave the way to high speed integrated optoelectronic computing circuits.