基于高次谐波光源的X射线全息成像实验研究

项目名称： 基于高次谐波光源的X射线全息成像实验研究

项目编号： No.61275126

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 兰鹏飞

作者单位： 华中科技大学

项目金额： 92万元

中文摘要： 微纳尺度的精密成像技术是认识微观世界的重要手段，在材料、生物、物理学等领域有重要的应用价值。近年来，由于同步辐射和自由电子X射线激光的出现，基于这些光源的成像技术引起了人们极大的兴趣，并在相关学科中取得了重要成果。然而，由于这些大型光源造价昂贵、脉宽长、相干控制技术难度高、仪器规模大等原因，限制了其在世界范围内的普及和应用。为了克服这些困难，本项目提出了基于台面化高次谐波X射线光源的成像方案，同时结合我们最新提出的对称弧形参照物全息成像技术以实现百纳米级的超快成像。另外，拟采用中红外光参量激光获得水窗波段的X射线光源，从而可以实现更高分辨率的全息成像，并进一步开拓水窗X射线光源成像技术在生物医学方面的应用。该成像系统的建立将为国内外同行提供台面化的纳米成像研究平台，必将促进物理、化学、材料和生命等应用前沿的创新。

中文关键词： 飞秒激光；高次谐波；衍射成像；；

英文摘要： Precision imaging technique on the micro- and nano- scales is of great importance for understanding the microscopic world, especially for the applications in materials, biology, physics sciencens. With the development of the synchrotron raditiaon and X-ray free electron laser, x-ray imaging has attracted great interest in the recent years. However, the cost of such large scale sources is very high. Also it is a great chanllenge for conheret controling these soucres. These difficulties limite the worldwide applications of x-ray imaging based on the large-scale sources. To overcome these problems, in this project, a time-resolved x-ray holography imaging based on a tabletop coherent high-order harmonic soft-x-ray beams is developed. By using our lastly-development Arc-holography technique, high temporal and spatial of about 100 nm can be achieved. Moreover, tabletop high-order harmonic x-ray source in the "water window" region will be obtained using a infrared laser pulse, which will be generated by optical parametric application technique. The "water window" x-ray souce will enables us achieve a higher spatial resolution and also can be used to for lots of applications in nanomatericals and biomedical sicences. Such a tabletop x-ray holographic imaging system will provide a micro-nano research platform that is e

英文关键词： Femtosecond laser；High harmonic generation；Diffraction imaging；；