Chinese Optics Letters, 2016, 14 (9): 090501, Published Online: Aug. 3, 2018   

Near-field holography enhanced with antireflection coatings—an improved method for fabricating diffraction gratings Download: 1236次

Author Affiliations
1 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
2 Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, Jena 07743, Germany
3 Technische Universität Braunschweig, Laboratory for Emerging Nanometrology, Pockelsstr. 14, Braunschweig 38106, Germany
4 Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig 38116, Germany
Abstract
Near-field holography (NFH), with its virtues of precise critical dimensions and high throughput, has a great potential for the realization of soft x-ray diffraction gratings. We show that NFH with reflections reduced by the integration of antireflective coatings (ARCs) simplifies the NFH process relative to that of setups using refractive index liquids. Based on the proposed NFH with ARCs, gold-coated laminar gratings were fabricated using NFH and subsequent ion beam etching. The efficiency angular spectrum shows that the stray light of the gratings is reduced one level of magnitude by the suppression of interface reflections during NFH.

Yuanfang Li, Huoyao Chen, Stefanie Kroker, Thomas Käsebier, Zhengkun Liu, Keqiang Qiu, Ying Liu, Ernst-Bernhard Kley, Xiangdong Xu, Yilin Hong, Shaojun Fu. Near-field holography enhanced with antireflection coatings—an improved method for fabricating diffraction gratings[J]. Chinese Optics Letters, 2016, 14(9): 090501.

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