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Personal profile

Research interests

The application of quantum mechanics to information science removes certain limits set by classical physics. Quantum technologies provide a level of performance that cannot be reached through classical means, promising fast and powerful computation, secure and efficient communication, and ultra high-resolution imaging. To fully realise these gains, we require the development of techniques that preserve the enhancement, and optical methods provide many opportunities to achieve these goals.

In the Experimental Quantum Optics group, a core area of research is the development of novel methods for the generation, manipulation, and detection of quantum states of light. Our interests include the application of high-dimensionally entangled systems to secure communication protocols, the development of direct and indirect methods for the measurement of quantum states, the fundamental limits of super-resolution imaging, and the development of ultra-sensitive photonic sensors. Ultimately, we are interested in how new methods in quantum optics can enable us to reach the performance advantages of quantum technologies.

For more information please see the Experimental Quantum Optics group website.

Biography

Jonathan joined Heriot-Watt University in the autumn of 2012 to establish a research program in experimental quantum optics. His research interests are in applying classical and quantum optics techniques to solve problems in information science, nano-photonic optical sensing and sub-resolution imaging. 

Prior to joining Heriot-Watt, Jonathan was a senior research associate in the Quantum Photonics group at the University of Ottawa, Canada.   He worked closely with Prof. Robert Boyd, the Canada Excellence Research Chair (CERC), to develop the research program in nanophotonics methods for quantum nonlinear optics. Before this position in Canada, Jonathan was a postdoctoral researcher in the Optics Group at the University of Glasgow, UK. 

Jonathan's recent work in the field of quantum optics include using high-dimensional quantum entanglement to show violations of generalised Bell inequalities, holographic ghost imaging, and an experimental demonstration of the angular EPR paradox. These experiments explore the capabilities of high-dimensional spatial entanglement for important quantum information protocols. 

On completion of his PhD, obtained from the University of Glasgow, Jonathan worked to integrate the fields of optical trapping and microfluidics to develop ultra-senstive sensors. He also has industrial experience from his work with Lumerical Inc, a world leading nano-photonic design software company. Jonathan started his undergraduate work at the University of Manchester and then moved to study at the University of Glasgow, where he obtained an MSci in Physics.  

Research Group Contact Details

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Research Output

Tracking the polarisation state of light via Hong-Ou-Mandel interferometry

Harnchaiwat, N., Zhu, F., Westerberg, N., Gauger, E. & Leach, J., 20 Jan 2020, In : Optics Express. 28, 2, p. 2210-2220 11 p.

Research output: Contribution to journalArticle

Open Access
File
  • 7 Downloads (Pure)

    5.7 A 256×256 40nm/90nm CMOS 3D-Stacked 120dB Dynamic-Range Reconfigurable Time-Resolved SPAD Imager

    Henderson, R. K., Johnston, N., Hutchings, S. W., Gyongy, I., Abbas, T. A., Dutton, N., Tyler, M., Chan, S. & Leach, J., 7 Mar 2019, 2019 IEEE International Solid-State Circuits Conference (ISSCC). IEEE, p. 106-108 3 p. (International Solid- State Circuits Conference (ISSCC)).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • A Reconfigurable 3-D-Stacked SPAD Imager with In-Pixel Histogramming for Flash LIDAR or High-Speed Time-of-Flight Imaging

    Hutchings, S. W., Johnston, N., Gyongy, I., Al Abbas, T., Dutton, N. A. W., Tyler, M., Chan, S., Leach, J. & Henderson, R. K., Nov 2019, In : IEEE Journal of Solid-State Circuits. 54, 11, p. 2947-2956 10 p.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 62 Downloads (Pure)

    Ghost imaging using entanglement swapped photons

    Bornman, N., Agnew, M., Zhu, F., Vallés, A., Forbes, A. & Leach, J., 26 Jul 2019, In : npj Quantum Information. 5, 63.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 30 Downloads (Pure)

    Ghost imaging with engineered quantum states by Hong-Ou-Mandel interference

    Bornman, N., Prabhakar, S., Vallés, A., Leach, J. & Forbes, A., Jul 2019, In : New Journal of Physics. 21, 7, 073044.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 3 Downloads (Pure)

    Datasets

    Non-line-of-sight tracking of people at long range

    Faccio, D. F. A. (Creator), Chan, S. (Creator), Leach, J. (Creator), Warburton, R. E. (Creator), Heriot-Watt University, 20 Feb 2017

    Dataset

    Simultaneous entanglement swapping of multiple orbital angular momentum states of light

    Leach, J. (Creator), Faccio, D. F. A. (Creator), Roger, T. (Creator), Heriot-Watt University, 2017

    Dataset

    Matlab files for quantum tomography

    Leach, J. (Creator), Heriot-Watt University, 17 Oct 2016

    Dataset

    Prizes

    Switched On Award for Most Engaging Lecturer 2015

    Jonathan Leach (Recipient), 13 May 2015

    Prize: Prize (including medals and awards)

  • Activities

    • 3 Participation in Festival or Exhibition
    • 3 Public lecture

    International Year of Light & Light Based Technologies 2015

    Jonathan Leach (Participant)
    11 Apr 2015

    Activity: Participating in or organising an eventParticipation in Festival or Exhibition

    Engineering the New Enlightenment

    Jonathan Leach (Speaker)
    14 Apr 2015

    Activity: Talk or presentationPublic lecture

    International Year of Light & Light Based Technologies 2015

    Jonathan Leach (Participant)
    23 Feb 2015

    Activity: Participating in or organising an eventParticipation in Festival or Exhibition

    Capturing Nature

    Jonathan Leach (Speaker)
    5 Jul 2015

    Activity: Talk or presentationPublic lecture

    'Meet the Experts' Explorathon '14

    Jonathan Leach (Speaker)
    26 Sep 2014

    Activity: Talk or presentationPublic lecture