Currently the Canada Research Chair in Quantum Photonics and an Assistant Professor in the Physics Dept. of the University of Ottawa. Prior to July 2013, he was a permanent Researcher (Associate Research Officer) at the National Research Council (NRC) of Canada. Born in Toronto, Canada, he did his undergraduate degree at Queen’s University in Kingston, Ontario. After, he returned to Toronto to work with Dr. Aephraim Steinberg at the University of Toronto where he earned my Masters and Ph.D. in experimental quantum optics and quantum information. As a Postdoctoral Fellow, he then did experimental research in the group of Prof. Ian Walmsely at the Clarendon Laboratory, University of Oxford. After a brief stint at ICFO in Barcelona working with Morgan Mitchell, he moved to Ottawa.
Quantum Information and Metrology in Integrated Photonic Circuits
Miniaturization in the electronics industry has culminated in microchips made up of billions of gates that act as the brains of most electronic devices today. Leveraging this technology built for electrons, we can now create microchips for photons as well. Known as integrated optical chips, these will drive the invention of new medical and environmental sensors and future telecommunications systems. Whereas these applications are mainly based on the classical optics of the last century, our laboratory is developing new kinds of photonic chips that function via the quantum physics of light, ‘quantum optics’. The long-range vision is to be able to implement the complicated circuits required by quantum algorithms. In the short-term, we are trying to create small-scale Quantum Information Processors and Quantum Metrology-based sensors on a chip.
Sources and Detectors of Quantum Light
To achieve the potential of Quantum Information and Metrology it will be necessary to develop new and better kinds of sources of single and entangled photons. We are designing and building waveguide sources of photons (through spontaneous four-wave mixing) that are compatible with integrated photonics. We are also building free-space sources in new geometries to produce novel kinds of entangled photon pairs, such as radially polarized photons, or photons with orbital angular momentum.
As the fields of photonics and Quantum Information mature, detectors of quantum light are becoming more sophisticated and complex. We are designing, developing and/or characterizing optical detectors that can, for example, count photons, image quantum light, detect quantum coherence directly.
Foundations of Quantum Theory
The study of Quantum Information has reinvigorated the effort to understand the fundamental concepts of Quantum Theory, such as measurement, the wavefunction, and entanglement. We are working to provide insight into these concepts by providing them with operational meanings. That is, definitions in terms of a simple set of operations in the laboratory. In turn, these operational meanings can inspire new applications and techniques in Quantum Information (e.g. how to measure the wavefunction). We are exploring the use of generalized measurements (e.g. weak measurement) as practical tools in metrology, optics, and Quantum Information.