In this one-hour seminar, Dragomir Neshev, Australian National University, will be presenting a talk titled, “Nonlinear and quantum light sources from ultra-thin nanostructured surfaces.”
Abstract – Nonlinear optical phenomena are central to a myriad of applications in light sources and microscopy. Nonlinear optical effects, such as harmonic generation, frequency mixing and spontaneous parametric down conversion are fundamentally enhanced in materials with a high refractive index, as well as by the presence of resonant photonic environment. These conditions are automatically fulfilled in resonant dielectric metasurfaces, which has triggered large interest in nonlinearity enhancement at the nanoscale. Despite their small volume, the dielectric metasurfaces can enhance the nonlinear frequency conversion to a level similar to millimetre-scale nonlinear crystals. Importantly, the nanostructuring enables properties not possible in bulk crystals, including engineering of the directionality of emission and polarisation of the emitted light. In this talk, I will review our group’s recent advances in the field of nonlinear metasurfaces for enhancement of nonlinear frequency conversion, generation of entangled photons and nonlinear upconversion imaging.
Bio – Dragomir Neshev is the Director of the Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems (TMOS) and a Professor of Physics at the Australian National University (ANU). He received a PhD from Sofia University, Bulgaria, in 1999. Since then, he has worked at several research centres worldwide before joining the ANU in 2002. He has been recognized for his outstanding work with numerous honours, including being named a Highly Cited Researcher (Web of Science, 2022 & 2021), receiving a Queen Elizabeth II Fellowship (ARC, 2010), and being awarded a Marie-Curie Individual Fellowship (European Commission, 2001). His activities span several branches of optics, including meta-optics, metasurfaces, periodic photonic structures, and singular optics.
This is an in-person seminar. If you opt to join via Zoom use:
Meeting ID 885 1212 4078
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