Tuomas Haggren

Tuomas Haggren is a Researcher at the Research School of Physics, Australian National University (ANU), affiliated with the ARC Centre of Excellence for Transformative Meta-Optical Systems. He focuses on nanowire-based optoelectronics, semiconductor materials, and photovoltaic technologies. His work emphasizes high-efficiency solar cells, flexible electronics, and metasurface engineering, with applications in energy conversion and quantum photonics.

Research interests include nanowire growth techniques, photoluminescence dynamics, and material passivation strategies. He explores novel semiconductors such as GaAs, InP, and AlGaAs for solar cells, photodetectors, and laser systems. His studies address challenges in scalability, cost-efficiency, and environmental stability of III-V materials.

Recent publications highlight advancements like 21.2% efficient GaAs solar cells using bilayer contacts and tunable quantum entanglement in metasurfaces. Haggren collaborates on projects like nonlinear imaging via sum-frequency generation, contributing to ANU's interdisciplinary research networks.

He supervises research students in experimental and theoretical studies of nanowire optoelectronics. Key achievements include flexible GaAs UV photodetectors and strain-engineered epitaxial lift-off techniques for photovoltaics. His work bridges fundamental material science with applied technologies for next-generation optoelectronic systems.