Color generationviasubwavelength plasmonic nanostructures

Abstract

Recent developments in color filtering and display technologies have focused predominantly on high resolution, color vibrancy, high efficiency, and slim dimensions. To achieve these goals, metallic nanostructures have attracted extensive research interest due to their abilities to manipulate the properties of light through surface plasmon resonances. In this paper, we review recent representative developments in plasmonic color engineering at the nanoscale using subwavelength nanostructures, demonstrating their great potential in high-resolution and high-fidelity color rendering, spectral filtering applications, holography, three-dimensional stereoscopic imaging, etc.

Dual Color Plasmonic Pixels Create a Polarization Controlled Nano Color Palette

“…4 Unlike conventional dye-doped polymers, these plasmonic filters can perform over length scales of <100 nm, making them particularly relevant to ultra-high resolution imaging applications, where the absorption limitations and fabrication challenges surrounding conventional filter miniaturization are proving to be a significant technical hurdle in delivering the next generation of image capture and display technologies. 1,5 Although in their infancy, plasmonic filters consisting of positive nanostructures have already been demonstrated as successful for full-color light separation in both transmissive and reflective systems, 3,[6][7][8][9][10] and have enabled colour image reproduction and display at the microscale; producing images with a 'printed' resolution that extends beyond the diffraction limit, and far exceeds the resolution limit of current color-printing technologies. 2,3 They have also been employed in optical storage technologies, 11 as a means to produce ultra-high resolution stereoscopic images, 9 incorporated with active media to enable a degree of color tunability, 12 and exploited as color reporters for biosensor applications.…”

“…Comprised of nano-scale apertures penetrating a metallic thin-film, plasmonic cavity-apertures are typically simpler to produce than their positive counterparts, and provide a less fabrication intensive route towards color selectivity. 1,14,15 Furthermore, these arrangements are perfectly suited to integration with existing CMOS image sensor technologies, such that full-color images can be obtained. 16,17 The implementation of these cavity-aperture filters is underpinned by the phenomena of extraordinary optical transmission (EOT) through periodic sub-wavelength apertures patterned in an otherwise optically opaque aluminum film.…”

Plasmonic Color Filters as Dual‐State Nanopixels for High‐Density Microimage Encoding

“…Recently, structural color systems based on engineered nanophotonic materials have emerged as an appealing alternative to absorptive dyes. [1][2][3][4][5][6][7][8][9][10][11][12] Among these examples are color filters based on plasmonics; filters which rely on the resonant interaction between incident photo ns and the free-electrons of nanoscale metal structures. Thus far, filters based on positive nanostructures, [4,7,9,[11][12][13][14][15] filters based on cavity apertures, [2,[16][17][18] and filters which combine both strategies [8] have been shown, each with distinct fabrication and geometrical solutions to achieving color "nanopixels" for selective white-light separation.…”

“…Chief among these are their subwavelength dimensions (leading to ultradense, ultrathin pixel arrays), and their long-term environmental stability (they do not degrade or fade over time due to radiation exposure). As a result, plasmonic filters have been positioned as new technological solutions for subwavelength color printing, [1,4,[7][8][9]12] anticounterfeiting measures, [19,20] and RGB splitting for image sensors; [2,17,21,22] thus representing one of the most promising, technologically relevant areas of current plasmonic research activity. Here, we explore a new application of polarizationcontrolled plasmonic filters: dual output, full-color optical image encoding.…”

Active Color Control in a Metasurface by Polarization Rotation

“…As its geometric dimensions are comparable to the wavelength of visible light, a periodic array of nanostructures exhibits optical resonances at visible wavelength, thereby producing color that corresponds to the scattering spectrum. The structural color generation by the metasurfaces has been successfully demonstrated in plasmonics [1][2][3][4][5][6] and dielectric systems [7][8][9][10][11] using a variety of designs (See review papers [12][13][14][15][16] for details). However, as the geometry of nanostructures specifies scattering properties, an array of nanostructures usually produces only one fixed color.…”