New twist on classic material could advance quantum computing

Researchers at Penn State University have developed a novel approach to enhance the electro-optic properties of barium titanate, a classic material known since 1941 for its strong ability to convert electrical signals into optical signals. By reshaping barium titanate into ultrathin strained thin films, the team achieved over a tenfold improvement in the conversion efficiency of electrons to photons at room temperature compared to previous results at cryogenic temperatures. This breakthrough addresses a long-standing challenge, as barium titanate had not been widely commercialized due to fabrication difficulties and stability issues, with lithium niobate dominating the electro-optic device market instead. The improved material has significant implications for quantum computing and data center energy efficiency. Quantum technologies often require cryogenic conditions, but transmitting quantum information over long distances needs room-temperature optical links, which this advancement could enable. Additionally, data centers, which consume vast amounts of energy primarily for cooling, could benefit from integrated photonic technologies that use photons rather than electrons to transmit data