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Organic Hyperbolic Materials In article number 2102230, Yeon Ui Lee, Zhaowei Liu, and co‐workers develop a structured illumination microscopy technique by using a low loss natural organic hyperbolic material (OHM). This OHM can support record high spatial‐frequency with an effective refractive index larger than 50 at visible frequencies. OHMs based speckle structured illumination microscopy demonstrates imaging resolution at 30 nm scales with enhanced fluorophore photostability, biocompatibility, easy to use, and low cost. [Image: see text] |