在极端紫外线中使用直频光谱
Arman Cingöz1, Dylan C Yost, Thomas K Allison
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA. acingoz@jila.colorado.edu
Nature
|February 3, 2012
概括
研究人员产生了强大的极紫外频,使得100纳米以下的精确光谱学. 这一突破证实了连贯性,并为基础物理学和先进计量学开辟了新的途径.
科学领域:
- 物理 物理学 物理
- 频谱学是一种光谱学.
- 量子光学是一种量子光学.
背景情况:
- 光学频率子通过将微波和光学频率联系起来,彻底改变了计量学.
- 极紫外线 (XUV) 频率是通过高波生成生成的,但缺乏足够的功率和连贯性.
- 以前的XUV子对于详细的光谱应用或观察相连贯性来说太弱了.
研究的目的:
- 为了生成强大的XUV频率子,用于先进的光谱应用.
- 为了证明XUV频率在极端紫外线光谱范围内的一致性.
- 将超高精度光谱扩展到100纳米以下的波长.
主要方法:
- 将一个高功率近红外频率子合到一个femtosecond增强腔.
- 产生的XUV频率可以达到波长短达40纳米.
- 在和过渡上进行单光子光谱学.
主要成果:
- 产生强大的XUV频率 (低至40nm).
- 对 (82 nm) 和 (63 nm) 过渡的单光子光谱信号的观测,证实XUV合性.
- 用前所未有的精度确定过渡 (82 nm) 的绝对频率.
结论:
- 生成的XUV频率是强大的和连贯的,适合高精度光谱学.
- 这项技术使得100纳米以下的光谱能够实现,这是连续波激光器无法进入的区域.
- 紫外线频率提供了在分子光谱学,基本物理测试和先进时钟应用的巨大潜力.
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