Study on characteristics of mid-infrared laser irradiated VO2 film

Chang Wu; Yuan Lu; Changqi Zhou

doi:10.1117/12.2667687

6 March 2023 Study on characteristics of mid-infrared laser irradiated VO₂ film

Chang Wu, Yuan Lu, Changqi Zhou

Proceedings Volume 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022); 1255311 (2023) https://doi.org/10.1117/12.2667687
Event: 2022 4th International Conference on Optoelectronic Science and Materials (ICOSM2022), 2022, Henfei, China

Abstract

Vanadium dioxide (VO₂) films play an increasingly important role in laser protection. The mid-infrared switching characteristics of VO₂ films are tested. The phase transition response time is measured and is at the nanosecond level. Measured at five wavelengths of 3.5 μm, 3.7 μm, 3.9 μm, 4.1 μm, 4.5 μm and 4.7 μm, the maximum of the power attenuation multiple before and after the phase change of the thin film was 13.29, and the minimum was 7.78. The switching characteristics of VO₂ films are obvious. In addition, the phase transition thresholds and damage thresholds of lasers with wavelengths of 3.7 μm, 3.9 μm and 4.1 μm on VO₂ films were measured. It was found that with the increase of the wavelength, the thin film phase transition threshold decreased and the damage threshold increased. The film has a good protective effect on mid-infrared lasers.

Citation Download Citation

Chang Wu, Yuan Lu, and Changqi Zhou "Study on characteristics of mid-infrared laser irradiated VO₂ film", Proc. SPIE 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022), 1255311 (6 March 2023); https://doi.org/10.1117/12.2667687

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