Abstract
Color plays an important role in human life: without it life would be dull and monochromatic. Printing color with distinct characteristics, like hue, brightness and saturation, and high resolution, are the main characteristic of image sensing devices. A flexible design of color filter is also desired for angle insensitivity and independence of direction of polarization of incident light. Furthermore, it is important that the designed filter be compatible with the image sensing devices in terms of technology and size. Therefore, color filter requires special care in its design, operation and integration. In this paper, we present a comprehensive review of nanostructured color filter designs described to date and evaluate them in terms of their performance.
Highlights
The incoming electromagnetic waves of the visible spectrum (400–700 nm) are capable of stimulating the photo-receptor cells of the human retina, which enables color perception
This review focuses on working principles of nanostructure color filters and absorbers based on Fabry-Perot (FP) cavity thin films, plasmonics, dielectric and liquid crystal technologies
Spatial resolution of approximately 141,000 dpi with a wide gamut and large angle invariant was achieved by implementing circular nanohole-nano-disk hybrid nanostructure arrays based on the uncoupled Localized Surface Plasmon Polaritons (LSPPs) [171] (Figure 5c)
Summary
The incoming electromagnetic waves of the visible spectrum (400–700 nm) are capable of stimulating the photo-receptor cells of the human retina, which enables color perception. Additive or subtractive color and Bayer filter [2], along with polymer-based filter technologies, have been exploited for image sensing. Over the last three decades, synthetic dyes and pigment-based colors [3] have been extensively used for decorating objects, printing ink, synthetic fibers and identification [4,5,6]. These filters have many disadvantages such as non-recyclability, non-affordability, and cause environmental damage. The reader is referred to [20,21,22] for review articles related to these areas
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