Abstract
Optical Imaging The practice of slicing through a sample at various depths with extreme ultraviolet (XUV) light to build up a three-dimensional picture of it is usually confined to synchrotron facilities. Intense infrared laser pulses impinging onto a gas cell of noble atoms generates high harmonics and provides access to the short wavelengths of XUV light with a tabletop source. Fuchs et al. show that filtering and focusing the high harmonics can narrow the range of wavelengths to produce a coherent XUV source. They demonstrate extreme coherent tomography by building up a three-dimensional image of a structured semiconductor sample with a depth resolution of 24 nanometers, providing an example of a tabletop laser source for highly spatially and temporally resolved coherent imaging applications. Optica 4 , 903 (2017).
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