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Wrinkling has become a well developed bottom-up technique to make artificial surface textures in about the last decade. However, application of the optical properties of long range ordered wrinkles has been limited to one dimensional gratings to date. We report the demonstration of macroscopic optical focusing using wrinkled membranes, in which concentric(More)
The genetic algorithm and the surplus rectangle algorithm are used for solving the orthogonal packing problem of rectangles. Based on statistical analysis of rectangular packing problem, a comparable standard for judgment of a solution has been proposed, which is adopted in classification of the parent population. A surplus rectangle algorithm is introduced(More)
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