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Integrated silicon photonics platform based on 2D materials

   Department of Physics

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  Dr Y Wang  No more applications being accepted  Funded PhD Project (European/UK Students Only)

About the Project

Two-dimensional (2D) materials that spawned out of the graphene revolution, have developed far beyond graphene in the last decade. These materials exhibit remarkable optoelectronic properties, such as strong exciton binding energy and high mobility [1]. 2D materials, ranging from insulating hexagonal boron nitride (hBN) and semiconducting transition metal dichalcogenides (TMDCs), to semi-metallic graphene, are a unique family of materials, whereby atoms are strongly bonded in the plane but only weakly attached out of plane by van der Waals forces. The weak interaction between layers makes the extraction of single or a few layers of atoms possible, thus leading to the burgeoning research on their fascinating properties that are distinctively different from their bulk parental materials [2]. Thanks to the weak interaction, these materials can also be placed onto an arbitrary substrate without lattice matching requirements.

This project focuses on building a complete optical network that include all the building blocks such as light sources, modulators, and detectors – something difficult to achieve in an entirely monolithic platform, however, is possible with the 2D material family. While the individual building blocks have been experimentally demonstrated [3], the field of integrated optoelectronics based on 2D materials is still in its infancy. In this project, we will work towards a low-cost, on-chip optical circuit and explore the opportunities for real-world applications, such as biological and chemical sensing, environmental monitoring and quantum computing.

Milestones: In year 1, the student will learn to fabricate the 2D optoelectrical devices, using the clean-room facility and nanofabrication equipment; in year 2, the student will optimise the performance of individual building blocks including sources, modulators, and detectors; in year 3-3.5, the student will demonstrate an integrated on-chip optical circuit.

[1] K. Novoselov, et al, Science 353, 6298 (2016); [2] H Fang, et al, Advanced Optical Materials 7 (20), 1900538 (2019); [3] P.G. Zotev, Y. Wang, et al, arXiv preprint arXiv:2105.09201.

This position will be based primarily at UoY.

Academic entry requirements: at least a class 2:1 MSc or MPhys degree in Physics.

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Funding Notes

International candidates please contact Dr Yue Wang for further information on funding.
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