Focusing and Wavefront Splitting of an Extreme Ultraviolet Laser with a Tubular Optical Element

Autor: Huaiyu Cui, Zhiyuan Wang, Shan Wu, Haojie An, Jinshi Wang, Yongpeng Zhao
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Photonics, Vol 10, Iss 6, p 629 (2023)
Druh dokumentu: article
ISSN: 2304-6732
DOI: 10.3390/photonics10060629
Popis: A capillary discharge extreme ultraviolet laser is focused and wavefront split at 46.9 nm by a tubular optical element. The reflectivity at 46.9 nm is both simulated and measured to be higher than 90% with a slight optical aberration. The operating principle of the tubular element for focusing and wavefront splitting is discussed. Dense and intense grating-like fringes with a period of ~150 nm are achieved. The method used in this work allows nano-scale processing with extreme ultraviolet laser at single-shot exposure mode.
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