Main supervisor: Dr. Andriy Gorbach
Second supervisor: Prof. Dmitry Skryabin
This project will focus on theoretical and numerical studies of the novel platform for light guidance and manipulation at miniature nano-metre scale: graphene plasmonic circuits. Similar to thin metal films, graphene supports propagation of surface plasmon polariton (SPP) waves, characterized by extreme confinement of electromagnetic energy on sub-wavelength nano-metre scale. The advantages of graphene SPPs over their conventional metal analogues include:
• Much lower losses, particularly in mid-infrared
• Tunable optical response, including dynamical tuning via voltage gating
• Strong localization of graphene SPPs in a wide wavelength range
• Exceptionally strong nonlinearity of graphene
In this project you will focus on development of nonlinear elements of graphene SPP-based plasmonic circuits, including nonlinear waveguide couplers and arrays, X- and Y-splitters, ring resonators, periodic structures. Project tasks include:
• Derivation of slow-light type models for analysis of graphene SPP propagation in various planar structures, starting from Maxwell equations with nonlinear boundary conditions.
• Numerical modelling of nonlinear graphene SPP propagation, switching, frequency conversion.
• Perturbation analysis of nonlinear stationary modes.
Design of functional all-optical logic elements.
Applicants should have a background in the physical sciences and have or expect to gain a First or good Upper Second Class UK Honours degree, or the equivalent from an overseas University.
Contact Dr. Andriy Gorbach ([email protected]
) for further information.
 A. V. Gorbach, Phys. Rev. A 87, 013830 (2013).
 A.V. Gorbach, Photonics 2, 825 (2015).
 H. Yan, T. Low, W. Zhu, Y. Wu, M. Freitag, X. Li, F. Guinea, P. Avouris, and F. Xia, Nat. Photonics 7, 394 (2013)