2023
DOI: 10.3390/photonics10060629
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Focusing and Wavefront Splitting of an Extreme Ultraviolet Laser with a Tubular Optical Element

Abstract: 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 … Show more

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