EPSRC CDT in Metamaterials (PhD studentship): Strong light-matter interactions in perovskites Ref: 2850

About the award

The studentship is part of the UK’s Centre of Doctoral Training in Metamaterials (XM2) based in the Departments of Physics and Engineering on the Streatham Campus in Exeter.  Its 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.

XM2 studentships are of value around £90,000, which includes £11,000 towards the research project (travel, consumables, equipment etc.), tuition fees, and an annual, tax-free stipend of approximately £14,500 per year for UK/EU students.

Exeter has a well-established and strong track record of relevant research, and prospective students can consider projects from a wide variety of fields:

  • Acoustic and Fluid-dynamical Metamaterials
  • Biological and Bio-inspired Metamaterials
  • Graphene and other 2D Materials, and related Devices
  • Magnonics, Spintronics and Magnetic Metamaterials
  • Microwave Metamaterials
  • Nanomaterials and Nanocomposites
  • Optical, Infra-red and THz Photonics and Plasmonics
  • Quantum Metamaterials
  • Wave Theory and Spatial Transformations

Please visit www.exeter.ac.uk/metamaterials to learn more about our centre and see the full list of projects that we have on offer this year.

International students are welcome to apply: fees and project costs will be paid, but the stipend can only be provided in exceptional circumstances.  We encourage international scholarship applicants or recipients to contact us directly prior to making their application (metamaterials@exeter.ac.uk).

Statement of Research

Joint supervisors: Prof Monica Craciun, Prof Saverio Russo, Dr Namphung Peimyoo

External collaborators: University of Salento (Lecce, Italy)

The emergence of organic-inorganic perovskites has opened up new opportunities for photovoltaics and novel fundamental aspects of light-matter interaction. In this PhD project, the student will harvest the potential of this emerging family of materials to explore strong light-matter interaction in quantum cavity electrodynamics, exciton-polariton coupling and single-photon emission. This fundamental knowledge will then serve as a launching pad for pioneering electrically driven perovskite-based light sources with the broad tunability of emission wavelengths in the spectral range from ultra-violet (UV) to near infra-red (IR) -such as perovskite lasers via photonic or polaritonic lasing, and microcavity-enhanced single-photon devices.

Optically active organic and inorganic perovskites are materials with composition ABX3 (A = CH3NH3+, Cs; B = Pb2+ or Sn2+; and X = Cl, I, and/or Br−). They have been shown to exhibit very high power conversion efficiencies, they are low cost, nature-abundant in their raw form, and their fabrication processes are low-temperature and scalable. These unique properties make perovskites uniquely suited for revolutionary photovoltaic and lighting applications. For example, solution-processed colloidal perovskites have been shown to display a near-unity photoluminescence quantum yield [1], which is comparable to the values demonstrated with epitaxially grown gain media in extensively used III-V laser diodes. However, the gateway to novel opto-electronic applications would only come from the demonstration of electrically driven lasing which is yet to come.
Understanding the strong luminescence emission of perovskite materials will be the essential starting point of this ambitious PhD project. For example, the nature of the room temperature emission of the typical methylammonium lead iodide perovskite remains controversial with possible interpretations pointing to free carrier recombination, direct-indirect transition or excitonic emission. Distinct from the conventional semiconductors, quantum confinement and reduced dielectric screening in atomically thin perovskites (2D or quasi-2D) remarkably enhance quasiparticle interactions where many-body effects become more obvious. The optical transitions may entangle with high-order excitonic quasiparticles such as trions and biexcitons and cause unconventional excitonic emission, which will be studied in this PhD project. The final goal of this project will be to demonstrate an electrically driven hybrid graphene/perovskite laser. To accomplish this ambitious aim, the student will harvest the unique synergy of state-of-the-art techniques and complementary knowledge by Dr Namphung Peimyoo (NP) on atomically thin light emitting diodes [2] and lasers [3] and the novel atomically thin electrically conductive graphene materials known as graphExeter [4] discovered by the team of Prof Craciun and Prof Russo.

[1] Adv Mater 28, 6804-6834 (2016).
[2] Nano Lett 16, 1560-1567 (2016).
[3] Nature Comm.8, 543 (2017)
[4] Adv Mater 24, 2844-2849 (2012).

About XM2

Metamaterials are fabricated microstructures having properties beyond those found in nature. They are an important new class of electromagnetic and acoustic materials with applications in many technology areas: energy storage and improved efficiency, imaging, communications, sensing and the much-hyped ‘cloaking’. Having recruited nearly 70 new PhD researchers in its first four years, the EPSRC Centre for Doctoral Training (XM2) hosted by the University of Exeter (www.exeter.ac.uk/metamaterials) will admit its fifth cohort of PhD students in September 2018.

The first year of the studentship includes an assessed, stand alone project, and a substantial programme of training. Students will choose from a wide range of taught modules, and participate in academic and personal development skills-based workshops, together with creativity events and conference-style meetings. The cohort will also be expected to disseminate their results to the international community via high-impact publications and international conferences. They will spend time working with our academic and industrial partners.  Full details of the programme are available here, or download a copy of our prospectus.

The University of Exeter combines world class research with excellent student satisfaction. It is a member of the Russell Group of leading research-intensive universities. Formed in 1955, the University has over 20,000 students from more than 130 different countries. Its success is built on a strong partnership with its students and a clear focus on high performance. Recent breakthroughs to come out of Exeter's research include the identification and treatment of new forms of diabetes and the creation of the world's most transparent, lightweight and flexible conductor of electricity. Exeter is ranked amongst the UK’s top 10 universities in the Higher Education league tables produced by the Times and the Sunday Times. It is also ranked amongst the world’s top 200 universities in the QS and Times Higher Education rankings.


Application deadline:31st January 2018
Number of awards:1
Value:Approximately £90,000, including research and travel budget, tuition fees and stipend (approximately [£14,500/£16,500] payable to UK or EU students only)
Duration of award:per year
Contact: Prof. Alastair Hibbins (Admissions Tutor)metamaterials@exeter.ac.uk

How to apply

Application criteria

During the application process you will need to upload the documents listed below. Please prepare these before starting the application process.

  • A statement describing why you would like to study for a PhD in Physics or Engineering,
  • A statement describing why you are considering a PhD programme that offers a cohort-based doctoral training model,
  • An academic CV,
  • A cover letter that discusses your preferred area(s) of study and/or your interest in a particular project/supervisor,
  • A document outlining your research interests and any relevant expertise,
  • Degree transcript(s) giving information about the qualification awarded, the modules taken during the study period, and the marks for each module taken,
  • The contact details of two academic referees.

Please note that of all the projects advertised we expect, as a Centre, to fill 15-20 posts only.

Shortlisting and interviews

Applications will be reviewed by members of the XM2 management board and candidates will be short-listed against a set of agreed criteria to ensure quality while maintaining diversity. Failure to include all the the elements above may result in rejection. Criteria will include:


  • Excellence in a lower degree in a relevant discipline;
  • Excellence in written and oral skills in English;
  • Evidence of knowledge of XM2 ethos, research themes and/or supervisors.


  • Specialist knowledge about one or more XM2 topics;
  • Research outputs (e.g. papers) and/or has undertaken training in research methodology (e.g. undergraduate research projects);
  • Ability to work collaboratively

Short-listed candidates will be interviewed by a panel of two academic members of staff drawn from the management board. If successful, a second interview will be undertaken by the potential academic supervisors for the student concerned. Offers are normally made shortly after a successful second interview.