Presentation Information
[2P41]Self-sustained electrical oscillations in layered structures of VO2 films grown on transparent conductive Al-doped ZnO
*Rikuto Ura1, Peng Yu1, Md. Suruz Mian1, Kunio Okimura1 (1. Tokai University)
This study focuses on self-sustained electrical oscillations (SEOs) in vanadium dioxide (VO2) thin films. VO2 undergoes IMT near 68℃, accompanied by a structural phase transition (SPT) that changes its resistance by over four orders of magnitude. Voltage can trigger this IMT to create oscillations. In this work, fabricated VO2 films on Al-doped ZnO(AZO), a transparent and conductive material. They investigated the properties of 160 nm and 200 nm thick VO2 films. The results showed that oscillation characteristics are highly dependent on film thickness. The oscillation frequency for the 160 nm film was 41.8-213 kHz, decreasing significantly to 10.9-24.4 kHz for the 200 nm film. This study proves that VO2 can function as a stable oscillator on a transparent AZO substrate. This achievement paves the way for next-generation functional devices that combine transparency and oscillatory functions, with promising applications in optical such as through the modulation of infrared light.