Dr Gediminas Juska is a Senior Researcher at Tyndall National Institute with extensive experience in advanced spectroscopy. His expertise includes single quantum dot (QD) spectroscopy for quantum information science, quantum light source design, QD engineering and epitaxy, nanostructures for visible and telecom wavelength devices, ultrafast phenomena in semiconductor nanostructures, and charge carrier dynamics in organic semiconductors.
Dr Juska’s current research focuses on generating highly entangled photonic cluster states, supported by two major Irish national grants. The Frontiers for the Future programme aims to advance the experimental and theoretical aspects of spectroscopic protocols for constructing multidimensional cluster states. Simultaneously, the photonic platform development is being addressed through a newly funded European Innovation Council Pathfinder programme, which Dr Juska coordinates as part of an international consortium QCEED comprising seven partners.
His primary research interests lie in the engineering and spectroscopic characterization of site-controlled QDs and spin physics with QDs. His work has significantly advanced the understanding of InGaAs and GaAs site-controlled pyramidal QDs, establishing the conditions for single and entangled photon emission based on their electronic structure and epitaxial design. He also resolved longstanding misconceptions about these complex structures, providing a foundation for ongoing developments in pyramidal QD-based quantum information devices. Notably, Dr Juska’s research was the first to demonstrate entangled photon emission and the violation of Bell’s inequalities within the site-controlled QD family.
Currently, Dr Juska supervises and co-supervises several PhD students. As an expert in cryogenics, he has played a key role in establishing a unique laboratory in Ireland dedicated to quantum optics and photonic quantum computation. He is the author of numerous peer-reviewed papers, including Nature Photonics publications where he served as the first author.
During his Tyndall years, he has had several occasions to collaborate and contribute to industry projects (e.g. INTEL, Rockley Photonics).
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