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 Quantum Optics and Computational Imaging 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 Quantum Optics and Computational Imaging group website.
Biography
Jonathan joined Heriot-Watt University in the autumn of 2012 to establish a world-class research program in experimental quantum optics. His research interests are in developing new classical and quantum optics techniques to solve problems in information science, optical sensing and 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.
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
Quantum Optics and Computational Imaging at Heriot-Watt University
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Collaborations and top research areas from the last five years
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Human activity recognition at a kilometer range using single-photon LiDAR
Plosz, S., Tobin, R., McCarthy, A., Wade, E., Scholes, S., Soan, P. J., Halimi, A., Buller, G. S. & Leach, J., 9 Mar 2026, In: Optics Express. 34, 5, p. 8323-8339 17 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile5 Downloads (Pure) -
Plug-and-play algorithm for 3D guided video super-resolution of single-photon LiDAR data
Ruget, A., Wilson, L., Leach, J., Tobin, R., McCarthy, A., Buller, G. S., McLaughlin, S. & Halimi, A., 10 Mar 2025, In: Optics Express. 33, 5, p. 11775-11792 18 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile7 Link opens in a new tab Citations (Scopus)61 Downloads (Pure) -
Super-resolution depth imaging via processing of compact single-photon histogram parameters
Wilson, L., Ruget, A., Halimi, A., Hearn, B. & Leach, J., 2 Jun 2025, In: Optics Express. 33, 11, p. 23657-23667 11 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Link opens in a new tab Citation (Scopus)48 Downloads (Pure) -
Wavelength-adaptive spin-orbit orbital angular momentum management in three-wave mixing
Dekkers, K., Koni, M., Hakobyan, V., Singh, S., Leach, J., Brasselet, E., Nape, I. & Forbes, A., Nov 2025, In: Journal of Optics. 27, 11, 115501.Research output: Contribution to journal › Article › peer-review
Open Access1 Link opens in a new tab Citation (Scopus) -
A Plug-and-Play Algorithm for 3D Video Super-Resolution of Single-Photon LiDAR data
Ruget, A., Wilson, L., Leach, J., Tobin, R., McCarthy, A., Buller, G. S., McLaughlin, S. & Halimi, A., 12 Dec 2024, arXiv.Research output: Working paper › Preprint
File157 Downloads (Pure)
Datasets
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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
DOI: 10.17861/8a0669d3-8f9b-4d8a-b204-f980f5d57c29
Dataset
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Quantum imaging using entanglement swapped photons
Leach, J. (Creator), Heriot-Watt University, 12 Feb 2019
DOI: 10.17861/eff58313-703e-474f-a139-43c582f47b8f
Dataset
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Dataset for "High-speed 3D sensing via hybrid-mode imaging and guided upsampling"
Leach, J. (Creator), Heriot-Watt University, 27 Aug 2020
DOI: 10.17861/c06d338f-ce87-40a3-8f10-12a8ca359a01
Dataset
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Arbitrary Image Reinflation: A deep learning technique for recovering 3D photoproduct distributions from a single 2D projection
Leach, J. (Creator), Ruget, A. (Creator), Sparling, C. (Creator) & Townsend, D. (Creator), Heriot-Watt University, 2021
DOI: 10.17861/1b0da270-4812-476b-9226-43e6467792c6
Dataset
Prizes
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Switched On Award for Most Engaging Lecturer 2015
Leach, J. (Recipient), 13 May 2015
Prize: Prize (including medals and awards)
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Engineering the New Enlightenment
Leach, J. (Speaker)
14 Apr 2015Activity: Talk or presentation › Public lecture
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International Year of Light & Light Based Technologies 2015
Leach, J. (Participant)
11 Apr 2015Activity: Participating in or organising an event › Participation in Festival or Exhibition
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International Year of Light & Light Based Technologies 2015
Leach, J. (Participant)
23 Feb 2015Activity: Participating in or organising an event › Participation in Festival or Exhibition
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Royal Society Summer Science Exhibition
Leach, J. (Participant)
1 Jul 2014 → 6 Jul 2014Activity: Participating in or organising an event › Participation in Festival or Exhibition