The University of Southampton

Novel Glass and Fibre

The Novel Glass Group plays a central role in a broad spectrum of ORC activities, providing the next generation of optoelectronic materials, with a particular strength in chalcogenide glasses. Unlike traditional glasses made from silica and oxides, these unusual materials are formed from sulphur. Believe it or not, these glasses already find use as the active layer in rewritable DVDs, high efficiency solar cells, next generation FLASH memory, as well as more traditional infrared optics

Our group’s mission is to explore all aspects of new types of glass for application in cutting edge optoelectronic devices. It is an active group collaborating with many other ORC research groups as well as university and industry worldwide. This strength is reflected in the hundreds of publications, large number of patents, state of the art glass making facilities and the career paths which our students follow after a post graduate degree with us.

Group webpage

PhD Projects:

Novel CVD grown 2D materials for optoelectronic applications

Supervisor: Professor Dan Hewak 
Co-supervisor: Dr Kevin Chung-Che Huang

Graphene, the well-publicised and now famous two-dimensional carbon allotrope, is as versatile a material as any discovered on Earth. Its amazing properties as the lightest and strongest material, compared with its ability to conduct heat and electricity better than anything else, mean that it can be integrated into a huge number of applications.

Initially this will mean that graphene is used to help improve the performance and efficiency of current materials and substances, but in the future it will also be developed in conjunction with other two-dimensional (2D) materials, such as MoS2, to create some even more amazing compounds to suit an even wider range of applications. We have been routinely fabricating mono-layer graphene and single crystalline MoS2 thin films with our novel CVD technology. In this project, we will be focusing on turning these CVD grown 2D materials into optoelectronic devices with nanofabrication techniques.

Research costs are fully funded by: 
EP/M008487/1 Chalcogenide Photonic Technologies 
EP/N00762X/1 National Hub in High Value Photonic Manufacturing
EP/N020278/1 Development and Application of Non-Equilibrium Doping in Amorphous Chalcogenides

To discuss your application, please contact Prof Dan Hewak

State of the art transition metal di-chalcogenide nanowires for electronic and biosensing applications

Supervisor: Professor Dan Hewak
Co-supervisors:  Ioannis Zeimpekis, Kevin Huang

2D Transition metal dichalchogenides (TMDCs) are emerging as the next generation semiconductor materials as they offer a direct bangap and therefore high on/off ratios, relatively high mobility, short-channel effects immunity, and near ideal subthreshold swings. Our group has extensive experience in growing these materials as thin films and monolayers directly on a variety of substrates by atmospheric pressure chemical vapour deposition (APCVD).

This project focuses on the fabrication and characterisation of TMDC nanowires for electronic and sensing applications. The project accommodates the fabrication of nanowires composed, but not restricted to the range of materials already developed in the group. The devices will be electrically characterised and categorised based on their merits. The best transistors created from this process will be used to develop a state of the art biosensor based on TMDC nanowires.

The successful candidate will work closely with a high multidisciplinary team that will give him valued experience, the opportunity for collaborations and high impact publications. 

Funded research programmes
EP/M008487/1  Chalcogenide Photonic Technologies
EP/N00762X/1 National Hub in High Value Photonic Manufacturing 
EP/N020278/1 Development and Application of Non-Equilibrium Doping in Amorphous Chalcogenides

Discovery and Application of Advanced Functional Materials

Supervisor: Professor Dan Hewak
Co-supervisors:  Brian Hayden (Chemistry)

The project, funded by EPSRC, is in collaboration with four UK Universities and over 15 industrial partners.  The research will be undertaken in collaboration with the Optoelectronics Research Centre and the Composite Materials Facility, both at the University of Southampton.  It will address high throughput materials discovery, fabrication and application of advanced materials, including chalcogenides and 2D materials, for next generation optoelectronic devices.  You will work directly with industrial partners developing applications of these materials.

Applications will be driven by the needs of our industrial partners and include for example, thin films for energy harvesting, in particular thermoelectric devices.  The research topics will be indirect response to industrial needs and therefore be relevant for a future career in an industrial research position.

The project will be undertaken in a team environment and you will work closely with an established group of scientists and other PhD students.  There could be opportunities to spend time at partner institutions and industrial partner laboratories resulting in a solid foundation for future career development after graduation.

Probing the quantum light emission from emerging 2D monolayer Transition Metal Di-Chalcogenides

Supervisor: Dr Kevin Chung-Che Huang
Co-supervisors: Dr Katrina Morgan

Two dimensional (2D) monolayer transition metal di-chalcogenide semiconductor materials are emerging as revolutionary components in nanophotonics. Recently, defects and strains in 2D materials (2DM) have attracted considerable interest as they can be engineered to realize quautum light emission, such as single-photon emitters, a crucial element for the development of quantum information technologies.

Here we propose a revolutionary approach based on wafer-scale 2D monolayers grown by Van der Waals Epitaxy (VdWE). Unlike the current 2D flakes (typically few tenths of micrometers) prepared by various CVD or exfoliation processes, our wafer-scale 2D monolayers are compatible with the current CMOS process, hence it would be much easier to control the defects and strains at ideal locations over a large-scale fabrication process. This innovative strategy will open up a full control of the light-matter interaction without compromising the possibility of locating and manipulating defects/strains in the 2D monolayers.

In addition, waveguides and resonators/photonic crystals can be further integrated on the surface of 2DM by nanofabrication process to enhance (via Purcell effects with resonators or photonic crystal structures) and control of light emission in order to move towards room-temperature operation of multipurpose scalable quantum devices.

State of the art transition metal di-chalcogenide nanowires for electronic and biosensing applications

Supervisor: Ioannis Zeimpekis
Co-supervisors: Dr Katrina Morgan

2D Transition metal dichalchogenides (TMDCs) are emerging as the next generation semiconductor materials as they offer a direct bangap and therefore high on/off ratios, relatively high mobility, short-channel effects immunity, and near ideal subthreshold swings. Our group has extensive experience in growing these materials as thin films and monolayers directly on a variety of substrates by atmospheric pressure chemical vapour deposition (APCVD).

This project focuses on the fabrication and characterisation of TMDC nanowires for electronic and sensing applications. The project accommodates the fabrication of nanowires composed, but not restricted to the range of materials already developed in the group. The devices will be electrically characterised and categorised based on their merits. The best transistors created from this process will be used to develop a state of the art biosensor based on TMDC nanowires.

The successful candidate will work closely with a high multidisciplinary team that will give him valued experience, the opportunity for collaborations and high impact publications.

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