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arXiv 1401.4101physics.optics
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磁圆二色光谱中相位匹配圆偏振极紫外高次谐波的产生

Generation of phase-matched circularly-polarized extreme ultraviolet high harmonics for magnetic circular dichroism spectroscopy

Ofer Kfir, Patrik Grychtol, Emrah Turgut, Ronny Knut, Dmitriy Zusin, Dimitar Popmintchev, Tenio Popmintchev, Hans Nembach, Justin M. Shaw, Avner Fleischer, Henr… 展开作者

Ofer Kfir, Patrik Grychtol, Emrah Turgut, Ronny Knut, Dmitriy Zusin, Dimitar Popmintchev, Tenio Popmintchev, Hans Nembach, Justin M. Shaw, Avner Fleischer, Henry Kapteyn, Margaret Murnane, Oren Cohen

摘要:

圆偏振极紫外线和X射线辐射为材料的结构、电子和磁性提供了宝贵的途径。迄今为止,这种能力仅在大型X射线设施(如同步加速器)中可用。在这里,我们展示了第一个明亮的,相位匹配的,极端的紫外圆偏振高次谐波,并使用这种新光源的磁性圆二色性测量在M壳层吸收边缘的Co。我们表明,相位匹配的圆偏振谐波是独特的和强大的,产生与线性偏振高次谐波源相当的光子通量,所述线性偏振高次谐波源已经非常成功地用于超快元件选择性磁致伸缩器,光学实验因此,这项工作代表了一个关键的进步,使可能的元素特定的成像和光谱的多个元素同时在磁性和其他手性介质具有非常高的空间和时间分辨率,使用桌面规模的设置。

英文摘要:

Circularly-polarized extreme UV and X-ray radiation provides valuable access to the structural, electronic and magnetic properties of materials. To date, this capability was available only at large-scale X-ray facilities such as synchrotrons. Here we demonstrate the first bright, phase-matched, extreme UV circularly-polarized high harmonics and use this new light source for magnetic circular dichroism measurements at the M-shell absorption edges of Co. We show that phase matching of circularly-polarized harmonics is unique and robust, producing a photon flux comparable to the linearly polarized high harmonic sources that have been used very successfully for ultrafast element-selective magneto-optic experiments. This work thus represents a critical advance that makes possible element-specific imaging and spectroscopy of multiple elements simultaneously in magnetic and other chiral media with very high spatial and temporal resolution, using tabletop-scale setups.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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