EPSRC CDT in Metamaterials: Single photon frequency conversion with non-linear metamaterials

University of Exeter - Departments of Physics and Astronomy, and Department of Engineering

The studentship is part of the EPSRC Centre of Doctoral Training in Metamaterials (XM2), www.exeter.ac.uk/metamaterials. Our aim is to undertake world-leading research, while training scientists and engineers with the relevant research skills and knowledge, and professional attributes for industry and academia.

Joint supervisors: Dr I. Luxmoore, Prof E. Hendry

Efficient frequency conversion has wide-ranging applications in classical and quantum optical information processing. For example, single photons are vital for the communication of quantum information; however, there is a wavelength mismatch between fiber-optic communication networks operating around 1550nm and solid-state quantum optical sources, memories and qubits operating in the visible to near-infrared. Therefore, efficient non-linear frequency conversion is essential for developing hybrid quantum devices for future secure communication and information processing applications. Metamaterial integration provides a scalable route for the development of frequency-conversion interfaces, with resonant cavities offering high quality-factors and small-mode volumes as a means to overcome the inherently low efficiency of non-linear processes.

In this project, the student will investigate the photonic integration of 2D materials as a platform for efficient non-linear frequency conversion. The initial emphasis will be on graphene but other materials, such as transition metal dichalcogenides will also be investigated. Graphene has been shown to have a strong non-linear interaction with light and large enhancements of these non-linear effects have been predicted in the presence of graphene plasmonic resonances. To further enhance the non-linear effects, graphene plasmonic resonators will be coupled to conventional infrared and THz metamaterials [2]. The integration of metamaterial structures, resonant in the mid-IR to THz, with visible/near-IR nano-photonics will also be investigated. This represents a novel, doubly-resonant frequency-conversion platform, which could be used to replace inefficient mid-IR/THz detectors with high-performance and cost-effective silicon-based devices and could be employed for sensing applications [3].

4-year studentship: for UK/EU students, the studentship includes tuition fees and an annual stipend equivalent to current Research Council rates; for international students (non-EU) a very small number of fees only studentships may be available

[1] T. J. Constant et al., Nat. Physics 12, 124 (2016); M. Gullans et al., Phys. Rev. Lett. 111, 247401 (2013).
[2] P. Q. Liu et al., Nat. Commun. 6, 8969 (2015).
[3] I. J. Luxmoore et al., ACS Photonics 3, 936 (2016).

Share this PhD
     
  Share by Email   Print this job   More sharing options
We value your feedback on the quality of our adverts. If you have a comment to make about the overall quality of this advert, or its categorisation then please send us your feedback
Advert information

Type / Role:

PhD

Location(s):

South West England