High-color-purity, angle-invariant, and bidirectional structural colors based on higher-order resonances

초록

Structural colors with high color purity and low fabrication cost are highly desired in a wide variety of applications including displays, light emitting diodes, decorations, and optical detections. Here, we demonstrate a semitransparent pentalayer structure for creating angle-insensitive, hi ghpurity reflective colors that exploit a higher-order cavity resonance. Moreover, the designed structure in a symmetric configuration presents bright and saturated colors from both directions with a high effidency up to 85% and a high angular tolerance up to +/- 60 degrees. The described scheme involves one deposition run, thereby providing a significant step toward large-area applications in various areas. (C) 2018 Optical Society of America

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