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Dr J.P. Hadden

Dr J.P. Hadden

Postdoctoral Research Associate, Research
Advanced Materials and Devices - Sêr Cymru Research Group

School of Physics and Astronomy

Email
haddenj@cardiff.ac.uk
Campuses
Room C/3.07, Queen's Buildings - Central Building, 5 The Parade, Newport Road, Cardiff, CF24 3AA

Overview

I joined Cardiff University in 2018.  My work focusses on solid state quantum photonic technologies based on single photon emitting colour centres in wide bandgap materials such as Gallium Nitride, diamond and 2D materials. I currently hold a Sêr Cymru II Postdoctoral Fellowship for a project entitled 'NIQuED' - Nitride Integrated Quantum Emitter Devices.

Biography

Following completion of a MSci in Mathematics and Physics at the University of Bristol, I joined the Centre for Quantum Photonics with Profs Jeremy O'Brien and John Rarity, completing a PhD on "Photonic Structures and Techniques for Enhanced Measurement of Spin Qubits in Diamond".  Subsequently I became an Eyes High Postdoctoral Fellow in Prof. Paul Barclay's group at the Institute for Quantum Science and Technology at the University of Calgary.  I joined Cardiff University in 2018, working with Dr Anthony Bennett and Prof. Diana Huffaker.

Honours and awards

  • Sêr Cymru II Postdoctoral Fellowship 'NIQuED' - Nitride Integrated Quantum Emitter Devices. (2019)
  • Horizon 2020 Marie Sklodowska-Curie Actions Seal of Excellence (2019)

Academic positions

  • 2015 - 2018 Eyes High Postdoctoral Fellow, Institute for Quantum Science and Technology, University of Calgary.
  • 2013 - 2014 Posdoctoral Assistant, Centre for Quantum Photonics, School of Physics, University of Bristol.
  • 2008 - 2013 PhD Student, Centre for Quantum Photonics, School of Physics, University of Bristol.

Speaking engagements

  • J.P. Hadden, S. Bishop, G. Gough, D.M. Beggs, A.J. Bennett, D.L. Huffaker. Towards Nitride Integrated Quantum Emitter Devices, Sêr Cymru Celebration Workshop 2019, Mercure Hotel, Cardiff, 19th September 2019. (Poster, + selected as ‘lightning talk’).
  • J. P. Hadden, V. Bharadwaj, B. Sotillo, S. Rampini, R. Osellame, J. Witmer, H. Jayakumar, T. T. Fernandez, A. Chiappini, C. Armellini, M. Ferrari, R. Ramponi, P. E. Barclay, S. M. Eaton, Creation of high density nitrogen vacancy ensembles within femtosecond laser written waveguides for fully integrated sensing devices, Photonics Seminar Series 2018, Bristol, UK, 14 December 2018, (Invited Seminar Talk)
  • J. P. Hadden, V. Bharadwaj, B. Sotillo, S. Rampini, R. Osellame, J. Witmer, H. Jayakumar, T. T. Fernandez, A. Chiappini, C. Armellini, M. Ferrari, R. Ramponi, P. E. Barclay, S. M. Eaton, Creation of high density nitrogen vacancy ensembles within femtosecond laser written waveguides for fully integrated sensing devices, PHAS Symposium 2018, Calgary, Canada, 21 February 2018, (Contributed Talk)

Committees and reviewing

Reviewer for journals Nature Communications, Scientific Reports, Laser and Photonics Reviews, PRL, PRA, and APL, and for funding agency EPSRC.

Member of Environment Comittee - School of Physics and Astronomy, Cardiff University, (2019-Current)

Publications

2020

2019

2018

2017

2016

2013

2012

2011

2010

My current research interests are in the investigation and development of single photon emitting colour centres in wide band-gap compound semiconductors with mature growth and processing capabilities such as Gallium Nitride. I currently hold a Sêr Cymru II Postdoctoral Fellowship entiteld 'NIQuED' - Nitride Integrated Quantum Emitter Devices.

My previous work has focussed on the development of colour centres in diamond as photonic quantum technology resources such as single photon quantum emitters and solid state qubits for quantum information.  This involved the coupling of Nitrogen Vacancy (NV) or Silicon Vacancy (SiV) colour centres to photonic structures such as focussed ion beam (FIB) milled solid immersion lenses to improve photon collection efficiency (APL, 97(24), 241901, (2010)), whispering gallery mode microdisk resonators for cavity optomechanics (Optica, 3(9), 963. (2016)), and femtosecond laser written waveguides to guide and collect emitted light (Optics Letters, 43(15), 3586 (2018)).