Open AccessHigh‐Definition Optophysical Image Construction Using Mosaics of Pixelated Wrinkles
Author(s) -
Kim Kitae,
Kim SeUm,
Choi Subi,
Heo Kyuyoung,
Ahn Sukkyun,
Na JunHee
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202002134
Subject(s) - polarizer , wrinkle , optics , materials science , orientation (vector space) , pixel , computer science , spatial light modulator , planar , fabrication , computer vision , computer graphics (images) , optoelectronics , physics , birefringence , geometry , mathematics , composite material , medicine , alternative medicine , pathology
Despite many efforts in structuring surfaces using mechanical instabilities, the practical application of these structures to advanced devices remains a challenging task due to the limited capability to control the local morphology. A platform that programs the orientation of mechanically anisotropic molecules is demonstrated; thus, the surface wrinkles, promoted by such instabilities, can be patterned in the desired manner. The optics based on a spatial light modulator assembles wrinkle pixels of a notably small dimension over a large area at fast fabrication speed. Furthermore, these pixelated wrinkles can be formed on curved geometries. The pixelated wrinkles can record images, which are naturally invisible, by mapping the gray level to the orientation of wrinkles. They can retrieve those images using the patterned optical phase retardation generated under the crossed polarizers. As a result, it is shown that the pixelated wrinkles enable new applications in optics such as image storage, informative labeling, and anti‐counterfeiting.