脉冲激光制备ZnO薄膜的结构和光学特性

通过脉冲激光沉积方法在1.3 Pa氧氛围,石英衬底上制备了ZnO薄膜.用X射线衍射(XRD)谱,原子力显微镜(AFM),光致发光谱(PL)表征了薄膜的结构和光学特性.XRD谱显示在生长温度500℃时获得了六方结构的单晶薄膜;AFM显示出随着温度的提升,晶粒提升,而表面粗糙度变小;PL谱显示出强烈的紫外发射和蓝光发射.随着温度的提升,薄膜的结构和光学特性得到显著提高.     

利用生物机能实验系统开展传感器实验教学

医用传感器实验是医学院校传统的教学内容,目的是使医学生掌握生物信号的测量原理、方法,过去的实验内容已不能满足科技发展的需要。现代生物信号的数据记录与分析处理大都采用计算机系统,其能快速完成信息的采集、显示、保存和处理。为此开设了生物机能实验系统实验课,使医学生了解该系统工作原理,通过具体的实验系统操作掌握生物信号的测量方法,为以后的学习打下良好的基础。     

Scheme for splitting quantum information via W states in cavity QED systems

Assisted by multipartite entanglement, Quantum information may be split so that the original qubit can be reconstructed if and only if the recipients cooperate. This paper proposes an experimentally feasible scheme for splitting quantum information via W-type entangled states in cavity QED systems, where three-level Rydberg atoms interact with nonresonant cavities. Since W-type states are used as the quantum channel and the cavities are only virtually excited, the scheme is easy to implement and robust against decoherence, and the dependence on the quality factor of the cavities is greatly reduced.