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- W4294959062 abstract "Under white light illumination, gratings produce an angular distribution of wavelengths dependent on the diffraction order and geometric parameters. However, previous studies of gratings are limited to at least one geometric parameter (height, periodicity, orientation, angle of incidence) kept constant. Here, we vary all geometric parameters in the gratings using a versatile nanofabrication technique, two-photon polymerization lithography, to encode hidden color information through 2 design approaches. The first approach hides color information by decoupling the effects of grating height and periodicity under normal and oblique incidence. The second approach hides multiple sets of color information by arranging gratings in sectors around semi-circular pixels. Different images are revealed with negligible crosstalk under oblique incidence and varying sample rotation angles. Our analysis shows that an angular separation >= 10{deg} between adjacent sectors is required to suppress crosstalk. This work has potential applications in information storage and security watermarks." @default.
- W4294959062 created "2022-09-08" @default.
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- W4294959062 date "2022-04-13" @default.
- W4294959062 modified "2023-10-16" @default.
- W4294959062 title "Full Geometric Control of Hidden Color Information in Diffraction Gratings under Angled White Light Illumination" @default.
- W4294959062 doi "https://doi.org/10.48550/arxiv.2204.06191" @default.
- W4294959062 hasPublicationYear "2022" @default.
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