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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：光电工程与仪器科学学院院长、党委副书记
其他任职：辽宁省先进光电子技术重点实验室副主任，大连市新型功能材料与光电子器件重点实验室主任，中国超材料学会理事，中国机械工程学会极端制造分委员会委员，国际先进材料学会会士，Microsystems&Nanoengineering、chemosensors等期刊副编辑
性别：男
毕业院校：布里斯托尔大学
学位：博士
所在单位：光电工程与仪器科学学院
学科：光学工程. 电磁场与微波技术. 光学. 测试计量技术及仪器. 精密仪器及机械
办公地点：研教楼706
联系方式：0411-84706156
电子邮箱：caotun1806@dlut.edu.cn
Tunable Mid-Infrared Phase-Change Metasurface
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论文类型：期刊论文
发表时间：2018-07-18
发表刊物：ADVANCED OPTICAL MATERIALS
收录刊物：SCIE
卷号：6
期号：14
ISSN号：2195-1071
关键字：metamaterials; mid-infrared; phase change materials; surface plasmon resonance; tunable
摘要：The intense light-matter interaction of plasmonic metasurfaces provides an appealing platform for optical sensing. To date, most metasurface sensors are not spectrally tuned. Moreover, they operate in a total reflection mode, which complicates the optical setup. Transmissive tunable filters are therefore desirable. A mid-infrared (M-IR) tunable metasurface is described that operates in transmission mode. The resonant frequency of the filter is tuned by nonvolatile phase transitions to the dielectric properties of the chalcogenide material Ge2Sb2Te5. A broad transmittance spectral shift of 500 nm across the M-IR region is experimentally demonstrated. This shift is in good agreement with finite-difference time-domain simulations of the same structure. The design paves the way for on-chip M-IR multispectral interferometry and provides a promising approach for compact real-time M-IR measurements.