In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses

被引:8
|
作者
Rajeev, Rajendran [1 ]
Hellwagner, Johannes [1 ]
Schumacher, Anne [1 ]
Jordan, Inga [1 ]
Huppert, Martin [1 ]
Tehlar, Andres [1 ]
Niraghatam, Bhargava Ram [1 ]
Baykusheva, Denitsa [1 ]
Lin, Nan [1 ]
von Conta, Aaron [1 ]
Worner, Hans Jakob [1 ]
机构
[1] Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Phys Chem Lab, Vladimir Prelog Weg 2, CH-8093 Zurich, Switzerland
来源
Light-Science & Applications | 2016年 / 5卷
基金
瑞士国家科学基金会; 欧洲研究理事会;
关键词
beam splitting; below-threshold harmonics; coherent extreme-ultraviolet pulses; frequency gating; non-collinear generation; BELOW-THRESHOLD HARMONICS; PHASE-MATCHED GENERATION; ENHANCEMENT CAVITY; NONLINEAR OPTICS;
D O I
10.1038/lsa.2016.170
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Monochromatization of high-harmonic sources has opened fascinating perspectives regarding time-resolved photoemission from all phases of matter. Such studies have invariably involved the use of spectral filters or spectrally dispersive optical components that are inherently lossy and technically complex. Here we present a new technique for the spectral selection of near-threshold harmonics and their spatial separation from the driving beams without any optical elements. We discover the existence of a narrow phase-matching gate resulting from the combination of the non-collinear generation geometry in an extended medium, atomic resonances and absorption. Our technique offers a filter contrast of up to 10(4) for the selected harmonics against the adjacent ones and offers multiple temporally synchronized beamlets in a single unified scheme. We demonstrate the selective generation of 133, 80 or 56 nm femtosecond pulses from a 400-nm driver, which is specific to the target gas. These results open new pathways towards phase-sensitive multi-pulse spectroscopy in the vacuum-and extreme-ultraviolet, and frequencyselective output coupling from enhancement cavities.
引用
收藏
页码:e16170 / e16170
页数:7
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