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A new stereolithographic method for obtaining nanoparts—photopolymerization by evanescent waves (PEW)—is presented (see also the cover). The properties of evanescent waves are briefly reviewed, and then the experimental setup developed for PEW and some typical applications are described. PEW is demonstrated to be suitable for the fabrication of very thin parts, with an in-plane resolution of 1 μm and an out-of-plane resolution of 30 nm, and is versatile enough to be coupled to imaging, holographic recording, or pixel-by-pixel addressing setups.