基于相变材料的可调谐滤波开关  

Tunable Filter Switch Based on Phase Change Materials

作　　者：张文琪 汪剑波[1] ZHANG Wenqi;WANG Jianbo(College of Physics,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学物理学院,长春130022

出　　处：《现代应用物理》2023年第2期137-143,共7页Modern Applied Physics

基　　金：吉林省教育厅科学技术研究基金资助项目(JJKH20220724)。

摘　　要：基于相变材料GexSbyTez(GST)可在非晶态、晶态及二者间的任意相态中切换,使本身的电磁属性发生显著变化。将这一独特的相变特性GST与超表面结合,设计了一种可用于红外波段的宽带滤波开关,并计算了GST不同结晶状态下的透射强度,实现了GST相变前后宽带滤波开关的调制深度大于70.8%。研究结果表明,通过调节GST的晶化率,可实现开关位置的可调谐,所设计开关覆盖的宽带滤波范围为2.054~4.757μm,且对小于30°的小角度入射不敏感。Based on the unique phase transition characteristic of Ge x Sb y Te z(GST)material,which can switch between amorphous,crystalline,and any phase state between them,resulting in significant changes in its electromagnetic properties.A filter switch that can be used in the infrared band was designed by combining GST with metasurfaces.The transmissivity of GST in different crystal states was calculated,achieving a broadband switching filtering effect,with an absolute change of over 70.8%before and after the phase change.The results indicate that the tunable switch positions can be achieved by adjusting the crystallization rate of GST.The designed switch covers a broadband filtering range from 2.054μm to 4.757μm and is insensitive to small incidence angles(<30°).

关 键 词：超表面 相变材料 晶化率 宽带 红外 

分 类 号：TB34[一般工业技术—材料科学与工程] TN713[电子电信—电路与系统]