Plenary Lecture
Quantum Control and Strong Coupling via Semiconductor Exciton-Polaritons with Applications in Quantum Technologies
Professor Emmanuel Paspalakis
Materials Science Department, School of Natural Sciences
University of Patras
Patra, GREECE.
E-mail: paspalak@upatras.gr
Abstract: Polaritons are bosonic quasi-particles, hybrid light and matter quasi-particles, resulting from strong coupling of electromagnetic waves with an electric dipole-carrying excitation, for example an exciton. Specific examples are exciton-polaritons resulting from strong coupling of photon modes in semiconductor microcavities and excitons in quantum wells or quantum dots and exciton-polaritons in transition-metal dichalcogenides two-dimensional materials. Exciton-polaritons in semiconductor microcavities can be easily created, controlled, and detected, and have attracted considerable attention as candidates for the implementation of several critical quantum technologies, for example, in applications like generation of nonclassical light, qubits and gates for quantum computation, and the creation of solid state quantum simulators. Also, to induce strong light-matter interactions (or strong coupling) between a quantum emitter and a photonic structure not only are significant from a quantum nanophotonics point of view, but also are beneficial for exploring advanced quantum devices, and are the backbone of quantum technologies. These interactions enable light control at the single-photon level, giving rise to novel applications, such as ultrafast single-photon switches, single-atom lasers, quantum networks, and quantum information processing, among others. Here, I will present recent results from our group on: (i) the quantum control of entanglement in systems with excitons-polaritons and (ii) the strong coupling of quantum emitters near nanostructures made of two-dimensional semiconductors and its effect in the decay of the quantum emitters and on their entanglement dynamics. Acknowledgements: Co-financed by Greece and the European Union - European Regional Development Fund via the General Secretariat for Research and Technology bilateral Greek-Russian Science and Technology collaboration project on Quantum Technologies (project code name POLISIMULATOR).
Brief Biography of the Speaker: Professor Emmanuel Paspalakis is the vice-chair of the Department of Materials Science of the University of Patras. He received his doctorate degree in Physics in 1999 from Imperial College London. He has 20+ years’ work experience in R&D, both in Greece and abroad with numerous collaborations in UK, Germany, Spain, Hungary, Lithuania and USA. His research interests cover Nanophotonics, Quantum Optics, Quantum Control, Light-Matter Interactions, and Quantum Technologies. He has published over 155 papers in high-level international refereed journals that have obtained over 5800 citations and his h-index is 40. He has also participated in over 110 international conferences with various invited and plenary talks. He has been principal investigator and member in over 20 research grants. He is also member of the editorial board of several international journals, member of several scientific conference committees, and reviewer for several international scientific journals and research projects