Plenary Speakers


Plenary Speaker I



Prof. Kenneth Grattan FREng
The Royal Academy of Engineering, The UK National Academy of Engineering

City University London, UK


Biography: Professor Grattan graduated in Physics from Queen's University Belfast with a BSc (First Class Honours) in 1974, followed by a PhD in Laser Physics. His doctoral research involved the use of laser-probe techniques for measurements on potential new laser systems.
Following Queen's, in 1978 he became a Research Fellow at Imperial College of Science and Technology, sponsored by the Rutherford Laboratory to work on advanced photolytic drivers for novel laser systems. This involved detailed measurements of the characteristics and properties of novel laser species and a range of materials involved in systems calibration.
In 1983 he joined City University London as a "new blood" Lecturer in Physics, being appointed Professor of Measurement and Instrumentation in 1991 and Head of the Department of Electrical, Electronic and Information Engineering. From 2001 to 2008 he was the Associate and then Deputy Dean of the School of Engineering and from 2008 to 2012 the first Conjoint Dean of the School of Engineering & Mathematical Sciences and the School of Informatics. In 2013 he was appointed the Inaugural Dean of the City Graduate School. He was appointed George Daniels Professor of Scientific Instrumentation in 2013 and to a Royal Academy of Engineering Research Chair in 2014.
His research interests have expanded to include the development and use of fibre optic and optical systems in the measurement of a range of physical and chemical parameters. The work has been sponsored by a number of organizations including EPSRC, the EU, private industry and charitable sources, and he holds several patents for instrumentation systems for monitoring in industry using optical techniques. He obtained the degree of Doctor of Science (DSc) from City University in 1992 for his sensor work. Professor Grattan is extensively involved with the work of the professional bodies having been Chairman of the Science, Education and Technology of the Institution of Electrical Engineers (now IET), the Applied Optics Division of the Institute of Physics and he was President of the Institute of Measurement and Control during the year 2000. He has served on the Councils of all three of these Professional Bodies. He was awarded the Callendar Medal of the Institute of Measurement and Control in 1992, and twice the Honeywell Prize for work published in the Institute's journal as well as the Sir Harold Hartley Medal in 2012 for distinction in the field of instrumentation and control. He was awarded the Applied Optics Divisional Prize in 2010 for his work on optical sensing and the honorary degree of Doctor of the University of the University of Oradea in 2014.
He was elected President of the International Measurement Confederation (IMEKO) in 2014, serving from 2015 to 2018. He was elected to the Royal Academy of Engineering, the UK National Academy of Engineering, in 2008.
Professor Grattan has been Deputy Editor of the Journal Measurement Science and Technology for several years and currently serves on the Editorial Board of several major journals in his field in the USA and Europe. In January 2001 he was appointed Editor of the IMEKO Journal "Measurement" and also serves on their General Council. He is the author and co-author of over seven hundred refereed publications in major international journals and at conferences and is the co-editor (with Professor B T Meggitt) of a five volume topical series on Optical Fiber Sensor Technology. His work is highly cited by his peers nationally and internationally. He is a Visiting Professor at several major Universities in China, with strong links to Harbin Engineering University and the Shandong Academy of Sciences.
Professor Grattan has been a Member of the University Executive Committee (ExCo) since 2008 and chairs two of its sub-Committees, the University Sustainability Committee and the Business Continuity Management Committee. He has served on Senate for over 20 years, as well as many of its sub-Committees.

Plenary Speaker II



Prof. Alexey Kavokin
Westlake University, China and Universitat Paderborn, Germany


Speech Title: Qubits based on Split-Ring Condensates of Exciton Polaritons

Abstract: Superconducting flux qubits are based on a superposition of clock-wise and anti-clockwise currents formed by millions of Cooper pairs. In order to excite the system in a superposition state, the half-quantum flux of magnetic field is passed through the superconducting circuit containing one or several Josephson junctions. The system is forced to generate a circular current to either reduce the magnetic flux to zero or to build it up to a full-quantum flux. Circular currents of exciton-polaritons mimic the superconducting flux qubits being composed by a large number of bosonic quasiparticles that compose a single quantum state of a many-body condensate. The essential difference comes from the fact that polaritons are electrically neutral, and the magnetic field would not have a significant effect on a polariton current. We note however, that the phase of a polariton condensate must change by an integer number of 2π, when going around the ring. If one introduces a π-phase delay line in the ring, the system is obliged to propagate a clockwise or anticlockwise circular current to reduce the total phase gained over one round-trip to zero or to build it up to 2π. We show that such a π-delay line can be provided by a dark-soliton embedded into a ring condensate and pinned to a potential well created by the C-shape non-resonant pump-spot. The physics of resulting split-ring polariton condensates is essentially similar to the physics of flux qubits. In particular, they exhibit pronounced Bloch oscillations passing periodically through clockwise and anticlockwise current states as Figure 1 shows. We argue that qubits based on split-ring polariton condensates may be characterized by a high figure of merit that makes them a valuable alternative to superconducting qubits. (details)


Biography: Professor Alexey Kavokin has received his PhD in Physics from the Ioffe Institute of Russian Academy of Sciences in 1993. In 1998 he has become a Professor of the Blaise Pascal University, Clermont-Ferrand, France. In 2005 he has joined the University of Southampton, United Kingdom, as a Chair of Nanophysics and Photonics. In 2018 he has moved to China where he now works as a Chair Professor and Director of the International Center for Polaritonics at the Westlake university, Hangzhou. The track record of Prof. Kavokin includes over 400 publications mostly devoted to the physics of strongly coupled light-matter systems. He authored the monographs “Cavity polaritons” (Elsevier, 2003) and “Microcavities” (Oxford University Press, 2007, 2013). His awards include the Marie Curie Chair of Excellence in Rome (2006), the Megagrant of the Government of Russian Federation (2011) and the Established Career Fellowship of the EPSRC (United Kingdom, 2013). Main research achievements include the theory of Polariton lasing, the predictions of Optical Spin Hall and Spin Meissner effect and the series of works toward observation of the Light Induced Superconductivity.


Plenary Speaker III


Prof. Chao Lu
The Hong Kong Polytechnic University, Hong Kong


Biography: Prof. Chao Lu obtained his BEng in Electronic Engineering from Tsinghua University, China in 1985, and his MSc and PhD from University of Manchester in 1987 and 1990 respectively. He joined the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore as Lecturer in 1991 and has been an Associate Professor since January 1999. From June 2002 to December 2005, he was seconded to the Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), Singapore, as Program Director and Department Manager, helping to establish a research group in the area of optical communication and fibre devices. Since April 2006, he has been a Professor in the Department of Electronic and Information Engineering, Hong Kong Polytechnic University. His research interests are optical communication systems and networks, fibre devices for optical communication and sensor systems.