基于二氧化钒相变材料的光电器件激光防护研究

Research on laser protection of photoelectric devicesbased on vanadium dioxide phase change material

摘要:

随着激光致盲武器的快速发展，与之对应的激光致盲防护技术逐渐成为了一项重要的研究。相变材料二氧化钒(VO₂)因在合适的热、光、场等激励下发生半导体相与金属相的可逆相变导致光学和电学特性的显著变化而受到激光防护领域的持续关注。使用Drude-Lorentz模型对VO₂的光学常数进行了研究，针对单层二氧化钒在半导体相红外透过率不够高的问题进行了多层膜设计和优化，并实际制作了多层膜系。使用激光器与傅里叶红外光谱仪测试制备的VO₂薄膜，得到了薄膜的相变与防护效果等性能，验证了VO₂良好的激光致盲防护性能，实际测试表明半导体相的透过率大于92%，相变前后多层膜系的红外开关率超过98%。

Abstract:

With the rapid development of laser blinding weapons, the technique of laser blinding protection has attracted a surge of interest in the research community. Vanadium dioxide（VO₂） is a phase change material which has attracted continuous attention in the field of laser protection due to the remarkable change of its optical and electrical properties caused by the reversible phase transition between semiconductor phase and metal phase under appropriate heat, light and field excitation. In this paper, the Drude-Lorentz model was exploited to research the optical constants of VO₂. Design and optimization of vanadium-dioxide based multilayer film were carried out to overcome the shortcoming of low transmittance of semiconductor phases of single-layer VO₂. Lasers and a fourier infrared spectrometer were adopted to evaluate the characteristics and protective effects of the prepared VO₂ film, which verified the promising performance of VO₂ for laser blinding protection. Experimental measurement shows that the transmittance of semiconductor phase is greater than 92%, and the infrared switching ratio of multilayer film system before and after the phase transition is more than 98%.