Colloquia

Title: Solid-State Quantum Photonics: From Semiconductor Quantum Emitters to Integrated Quantum Interfaces

Abstract

Semiconductor quantum emitters are promising building blocks for future quantum technologies because they combine the properties of quantum systems with the scalability of semiconductor devices. Their integration with nanophotonic structures can enable efficient generation, control and manipulation of quantum states of light.

In this seminar, I will present experimental work on semiconductor quantum dots integrated with photonic waveguides and optical microcavities. I will discuss how the optical properties of these emitters can be engineered to improve photon coherence, how quantum light can be generated and guided in integrated photonic structures, and how the interaction between confined carrier spins and optical fields can be used to control the quantum state of emitted photons.

I will conclude with an outlook on the main challenges and opportunities for solid-state quantum photonics, including improved control of decoherence, stronger light-matter interactions, and the development of new materials and device platforms for future quantum technologies.

Short Biography

Sokratis Kalliakos is an experimental physicist working in photonics, semiconductor quantum optics and quantum technologies. He received his PhD in Condensed Matter Physics from the University of Montpellier and has carried out research in France, Italy, the United States, the United Kingdom and Belgium.

From 2010 to 2019, he was a Research Scientist at Toshiba Research Europe in Cambridge, where he worked on semiconductor quantum emitters, integrated quantum photonic devices and cavity quantum electrodynamics, in close collaboration with the University of Cambridge. He later joined Sony Depthsensing Solutions in Brussels as a Senior Optical R&D Engineer, working on advanced optical instrumentation, photonic devices and sensing technologies.

His research has resulted in more than 30 scientific publications, including articles in Nature Physics, Physical Review X, Physical Review Applied and Nano Letters, as well as a US patent in integrated quantum photonics. He previously taught in the Department of Materials Science and Technology at the University of Crete as an Adjunct Assistant Professor.