Suppression of higher diffraction orders in the extreme ultraviolet with a trapezoidal nano-mirror array

Higher diffraction orders from a grating introduce harmonic contamination in 'monochromatic' output beams processed by grating monochromators at synchrotron radiation facilities, resulting in imprecise calibration of optical elements and detectors. Suppressing these orders can be achieved...

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Bibliographic Details
Published inJournal of modern optics Vol. 66; no. 17; pp. 1754 - 1762
Main Authors Wei, Lai, Chen, Yong, Wang, Shaoyi, Fan, Quanping, Yang, Zuhua, Zhang, Qiangqiang, Wu, Yinzhong, Shen, Zhengxiang, Zhang, Zhong, Hua, Yilei, Zhu, Xiaoli, Xie, Changqing, Wang, Zhanshan, Cao, Leifeng
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 07.10.2019
Taylor & Francis Ltd
Subjects
Arrays
Astrophysics
Beams (radiation)
Calibration
Contamination
Fabrication
grating
Higher-order diffraction suppression
monochromatization
Monochromators
Optical components
Plasmas
Radiation
Synchrotron radiation
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Summary:Higher diffraction orders from a grating introduce harmonic contamination in 'monochromatic' output beams processed by grating monochromators at synchrotron radiation facilities, resulting in imprecise calibration of optical elements and detectors. Suppressing these orders can be achieved with a quasi-random nano-hole array, but its fabrication can be a significant limiting factor for implementation. Here, an advanced type of grating is demonstrated that contains a periodic array of several hundred million trapezoidal nano-mirrors with a grazing-incidence reflection geometry that suppresses higher diffraction orders. Moreover, it reduces the difficulty of fabrication to the level of a traditional grating. It has great potential for harmonic suppression in synchrotron radiation, spectral diagnostics of plasmas, and astrophysics.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2019.1663285