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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
Low-Power Phase Transition of Chalcogenide Glass Using Au Nanoparticle Plasmon Resonance
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论文类型：期刊论文
发表时间：2020-03-01
发表刊物：ADVANCED OPTICAL MATERIALS
收录刊物：SCIE
卷号：8
期号：6
ISSN号：2195-1071
关键字：mid-infrared; phase-change materials; surface-enhanced Raman scattering; surface plasmon resonance; tunable
摘要：Chalcogenide materials are attractive for all-photonic phase-change memories owing to their large optical contrast between amorphous and crystalline structural phases. However, high-power heating pulses are required to switch these structural phases, which can limit the cyclability. To reduce power, Au nanoparticles (NPs) are embedded in a typical chalcogenide phase-change material, Ge2Sb2Te5 (GST). Raman analysis shows that a GST film crystallizes at a low optical power of 2 mW, which is almost 10 times lower than that of materials not embedded with NPs. This lower power is owing to the enhanced light absorptance through the strongly localized surface plasmon resonance (LSPR) of the Au NPs. The Au NPs embedded in the GST film scatter light at lambda = 587 nm, which is close to Au NP's LSPR of approximate to 535 nm. Laser light at 532 nm is used to measure Raman scattering from the Au-GST system. The Raman scattering is enhanced by a factor 12 compared with a bare GST film. This study indicates that the GST film-Au NP system is suitable for high-speed, low-power, phase-change memory and for a new type of tunable surface-enhanced Raman scattering substrate.