Paper 14100-66
Paper 14100-66
Orientation-engineered strained BaTiO3 thin films with giant Pockels coefficient
14 April 2026 • 18:10 - 20:00 CEST | Galerie Erasme (Niveau/Level 0)
Abstract
BaTiO3 (BTO) offers strong electro-optic (EO) response for integrated photonics. We grow high-quality BTO on MgO by pulsed-laser deposition without buffer layers and realize amorphous, c-axis, cubic, and a-axis films suitable for rib waveguides. Device-level evaluation uses Mach–Zehnder interferometers: unbalanced arms for free-spectral-range (FSR) analysis and balanced arms for half-wave voltage. Combining measurements with field simulations, we extract reff for each orientation. a-axis devices show Vπ·L = 0.075 V·cm at 1.55 µm and reff ≈ 1263 pm/V (corresponding to r42 ≈ 1785 pm/V). This buffer-free, planar process enables orientation engineering for high-efficiency, scalable EO modulators.
Presenter
Young-Uk Jeon
Korea Institute of Science and Technology (Korea, Republic of), Korea Univ. (Korea, Republic of)
Young-Uk Jeon received the B.S. degree from the Department of Optometry at Seoul National University of Science and Technology, Seoul, Korea, in 2021. He is currently in integrated M.A./Ph.D. course in the Department of Electrical Engineering at Korea University, Seoul, Korea. He has become an active member of the Nanophotonics System Research Center of at Korea Institute of Science and Technology, where his research primarily focuses on waveguides and optical modulators utilizing ferroelectric materials, particularly perovskites.