Editors’ choice for the thematic issue “Wave Phenomena: Physics and Applications” is the paper entitled “A Second-Order Optical Differentiator Based on a Metal–Dielectric–Metal Composite Structure” by A. I. Kashapov, E. A. Bezus, D. A. Bykov and L. L. Doskolovich (Bulletin of the Russian Academy of Sciences: Physics, 2023, Volume 87, Issue 1, P. 13-17).
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