Nonlinear and quantum photonics group

Department of Electronic Materials Engineering

Nonlinear and quantum photonics group performs theoretical and experimental research on tailoring light-matter interactions. We do this in nonlinear synthetic structures for generation, manipulation and detection of light down to few-photon levels in the regime of quantum optics. We study the fundamental aspects of miniaturisation of optical elements down to micro- and nano-scale while achieving advanced functionalities beyond the capabilities of traditional optics. We also work on the development the photonic systems towards various applications including microscopy, optical monitoring, and space-based imaging.

The group is a part of the ARC Centre of Excellence for Transformative Meta-Optical Systems. We collaborate with TMOS members, and especially with the group of Professor Dragomir Neshev on optical metasurfaces.

Quantum nanophotonics

We develop ultra-thin metasurfaces composed of nanoresonators that can realize parallel transformation, imaging, or generation of quantum multi-photon states of light. This research combines the fundamental theory of quantum interference, entanglement, and interactions at the nanoscale, structure design and nanofabrication, and experimental investigations. Such nanophotonic structures can become essential components for robust, compact, and lightweight integrated optical devices.

Synthetic and topological integrated photonics

This research targets new conceptual approaches for practical realization of light dynamics beyond the conventional boundaries of three spatial dimensions. By combining the principles of synthetic and topological photonics, it becomes possible to implement multi-dimensional light dynamics and artificial magnetic field in conventional integrated photonic systems. This can lead to new advances in light trapping, sensing, and switching.

Advanced modelling, optimisation, and neural networks

Extensive numerical modelling and optimisation under practical experimental conditions are essential for designing complex integrated circuits and nanostructured metasurfaces. We are developing advanced simulation approaches for shaping and generation of quantum states of light, supported by the fundamental research of quantum-classical correspondence. These are combined with adjoint and topological optimisation approaches with applications to both classical and quantum states of light. We also explore the implementation and training of optical neural networks and their applications for optical pulse processing.

Space-based imaging

Our most recent research is on the development of optical metasurfaces for space-based imaging. The ultra-thin and lightweight metasurfaces are well suited for incorpotation in the satellite imaging systems. We study the fundamentals of imaging and new design approaches for robust operation across different spectral bands. We work towards practical solutions for future integration in space missions together with Prof. Robert Sharp at the Research School of Astronomy & Astrophysics.

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