Thermotolerance generated by plant/fungal symbiosis
Thermotolerance generated by plant/fungal symbiosis
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DOI：
10.1126/science.1072191
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发表时间：
2002-11-22
期刊：
影响因子：
56.9
通讯作者：
Henson, JM
中科院分区：
文献类型：
--
作者：
Redman, RS;Sheehan, KB;Henson, JM
我们提出了空间相干测量的极紫外（EUV）光产生的高谐波上转换的飞秒激光的过程中。与相位匹配的中空光纤的几何形状，所产生的光束被发现表现出基本上完全的空间相干性。这种类激光EUV光源的相干性通过记录小物体的伽柏全息图来显示。这项工作证明了与桌面实验装置进行EUV全息的能力。这种具有低发散度和高空间相干性的EUV源可用于涉及高精度计量、EUV光刻的光学部件检查以及具有纳米分辨率的显微镜和全息术的实验。此外，EUV辐射的短持续时间（几飞秒）将使EUV显微镜和全息术能够以100倍的时间分辨率进行。
We present spatial coherence measurements of extreme ultraviolet (EUV) light generated through the process of high-harmonic up-conversion of a femtosecond laser. With a phase-matched hollow-fiber geometry, the generated beam was found to exhibit essentially full spatial coherence. The coherence of this laser-like EUV source was shown by recording Gabor holograms of small objects. This work demonstrates the capability to perform EUV holography with a tabletop experimental setup. Such an EUV source, with low divergence and high spatial coherence, can be used for experiments involving high-precision metrology, inspection of optical components for EUV lithography, and microscopy and holography with nanometer resolution. Furthermore, the short time duration of the EUV radiation (a few femtoseconds) will enable EUV microscopy and holography to be performed with ultrahigh time resolution.