不同衬底的钴(Co)膜的超快动力学研究  

The study of ultrafast dynamics of cobalt films on different substrates

作　　者：许孝芳[1] 高永锋[1,2] 吕柳[1] 任乃飞[1] 周明[3] 郭宇娇 谌娇娇 孙鑫[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]宁波大学物理系,浙江宁波315211 [3]江苏大学光子制造科学与技术中心,江苏镇江212013

出　　处：《功能材料》2013年第22期3315-3318,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013004);国家自然科学基金资助项目(11204107);江苏省高校自然科学研究资助项目(13KJB510006;13KJB460004);江苏高校优势学科建设工程资助项目(PAPD);应用非线性科学与技术浙江省重中之重学科开放基金资助项目(xkz11208)

摘　　要：通过磁控溅射镀膜法制备了不同厚度的钴薄膜,利用飞秒激光泵浦探测技术研究了衬底材料分别为单晶硅、K9玻璃以及Tou玻璃的钴薄膜内部的超快动力学变化。实验结果表明,当用80mW的泵浦激光脉冲加热不同厚度、不同衬底的钴膜时,电子的加热时间不变,均为0.1344ps;而电子的热化时间则会发生变化,且与薄膜厚度和衬底材料均有关。在电-声子发生非平衡弛豫阶段,对于不同衬底材料的钴膜,其瞬态反射率曲线的变化趋势也不同。K9 glass substrates and Tou glass substrates,sepa-rately,by magnetron sputtering technique.The ultrafast dynamics of Co films were studied by using femtosec-ond laser pump-probe technology.The results show that,when the pumped power of femtosecond laser pulse was 80mW,and both the substrates and the thickness of cobalt films were not the same,the heating time of electrons in films was equal,was 0.1344ps;however the thermalized time of electrons in films was diverse,it was relative to the thickness and the substrates of Co films.Besides,when the substrates of Co films were changed,during the nonequilibrium lasting time of electrons,the transient reflectance curves were different.

关 键 词：飞秒激光 钴膜 瞬态反射 超快动力学 

分 类 号：O484[理学—固体物理]