Affiliation:
1. ETH Zurich D‐ITET Institute of Electromagnetic Fields Gloriastrasse 35 Zurich 8092 Switzerland
2. ETH Zurich D‐MAVT Institute of Robotics and Intelligent Systems Tannenstrasse 3 Zurich 8092 Switzerland
3. ETH Zurich D‐PHYS Institute for Quantum Electronics Optical Nanomaterial Group Auguste‐Piccard‐Hof 1 Zurich 8093 Switzerland
Abstract
AbstractThe study demonstrates high‐quality pulsed‐laser‐deposited (PLD) barium titanate (BTO) thin‐films on a magnesium oxide substrate. The frequency response of the relative permittivity (dielectric constant) and the linear electro‐optical coefficient (Pockels coefficient) are measured. At 0.2 GHz, the Pockels coefficient is fitted to be r42 ≈ 1030 pm V−1. It decreases to ≈390 pm V−1 at 10 GHz after which it remains constant up to 70 GHz. The unbiased BTO permittivity is measured to be εa ≈ 7600 at 0.2 GHz, dropping to ≈1100 at 67 GHz, while the biased BTO had a permittivity εa ≈ 2000 at 0.2 GHz, dropping to ≈500 at 67 GHz. These results fill an important experimental characterization gap for high‐speed BTO applications and show the high quality of PLD‐grown BTO films. Lastly, the material's crystalline quality is characterized and the domain distribution is imaged. The findings enable the design and fabrication of a new generation of BTO‐based components for sensing and communications.
Funder
HORIZON EUROPE Framework Programme
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Subject
Mechanical Engineering,Mechanics of Materials
Cited by
1 articles.
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