Abstract

We present what we believe to be the first implementation of Fourier transform (FT) holography using a tabletop coherent x-ray source. By applying curvature correction to compensate for the large angles inherent in high-NA coherent imaging, we achieve image resolution of $89\mathrm{nm}$ using high-harmonic beams at a wavelength of $29\mathrm{nm}$. Moreover, by combining holography with iterative phase retrieval, we improve the image resolution to $<53\mathrm{nm}$. We also demonstrate that FT holography can be used effectively with short exposure times of $30\mathrm{s}$. This technique will enable biological and materials microscopy with simultaneously high spatial and temporal resolution on a tabletop soft-x-ray source.

© 2009 Optical Society of America

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