Abstract:We report a structural color printing platform based on aluminum plasmonic metamaterials supporting near perfect light absorption and narrow-band spectral response tunable across the visible spectrum to realize high-resolution, angle-insensitive color printing with high color purity and saturation. Additionally, the fabricated metamaterials can be protected by a transparent polymer thin layer for ambient use with further improved color performance. The demonstrated structural color printing with aluminum plasm… Show more
“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Furthermore, it is an abundant, sustainable material with the potential to transition laboratorybased research into practical applications and commercial products. Much of the current and growing interest in Aluminum plasmonics is due to the wavelength range of the plasmon resonances obtainable with simple geometries.…”
mentioning
confidence: 99%
“…Its use as a potentially superior chromatic material relative to organic media for color displays has captured great interest. 6,7,10,14,17,[20][21][22] A range of nanostructures, such as discs, 7 holes, 22 rods, 6 and crosses, 21 have been fabricated and studied, showing localized plasmon tuning for optical filters and other colorimetric applications.…”
Aluminum is an abundant and high-quality material for plasmonics with potential for large-area, low-cost photonic technologies. Here we examine aluminum nanoclusters with plasmonic Fano resonances that can be tuned from the near-UV into the visible region of the spectrum. These nanoclusters can be designed with specific chromaticities in the blue-green region of the spectrum and exhibit a remarkable spectral sensitivity to changes in the local dielectric environment. We show that such structures can be used quite generally for colorimetric localized surface plasmon resonance (LSPR) sensing, where the presence of analytes is detected by directly observable color changes rather than through photodetectors and spectral analyzers. To quantify our results and provide a metric for optimization of such structures for colorimetric LSPR sensing, we introduce a figure of merit based on the color perception ability of the human eye.
“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Furthermore, it is an abundant, sustainable material with the potential to transition laboratorybased research into practical applications and commercial products. Much of the current and growing interest in Aluminum plasmonics is due to the wavelength range of the plasmon resonances obtainable with simple geometries.…”
mentioning
confidence: 99%
“…Its use as a potentially superior chromatic material relative to organic media for color displays has captured great interest. 6,7,10,14,17,[20][21][22] A range of nanostructures, such as discs, 7 holes, 22 rods, 6 and crosses, 21 have been fabricated and studied, showing localized plasmon tuning for optical filters and other colorimetric applications.…”
Aluminum is an abundant and high-quality material for plasmonics with potential for large-area, low-cost photonic technologies. Here we examine aluminum nanoclusters with plasmonic Fano resonances that can be tuned from the near-UV into the visible region of the spectrum. These nanoclusters can be designed with specific chromaticities in the blue-green region of the spectrum and exhibit a remarkable spectral sensitivity to changes in the local dielectric environment. We show that such structures can be used quite generally for colorimetric localized surface plasmon resonance (LSPR) sensing, where the presence of analytes is detected by directly observable color changes rather than through photodetectors and spectral analyzers. To quantify our results and provide a metric for optimization of such structures for colorimetric LSPR sensing, we introduce a figure of merit based on the color perception ability of the human eye.
“…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.…”
Abstract:Generating colors by employing metallic nanostructures has attracted intensive scientific attention recently, because one can easily realize higher spatial resolution and highly robust colors compared to conventional pigment. However, since the scattering spectra and thereby the resultant colors are determined by the nanostructure geometries, only one fixed color can be produced by one design and a whole new sample is required to generate a different color. In this paper, we demonstrate active metasurface, which shows a range of colors dependent on incident polarization by selectively exciting three different plasmonic nanorods. The metasurface, which does not include any tunable materials or external stimuli, will be beneficial in real-life applications especially in the display applications.
“…Therefore the challenge here is to design a simple plasmonic colour printing approach that addresses these issues and simultaneously guarantees low cost and high throughput scalable fabrication. Sub 100ânm metal structures are employed as plasmonic pixels in many of the reported works 8â17, 20 . The smaller structures demand tight control over several parameters during fabrication involving electron beam lithography (EBL) and nanoimprint lithography (NIL), which is a bottleneck for large scale implementation, even though they ensure near diffraction limit printing resolution.…”
Section: Introductionmentioning
confidence: 99%
“…Besides, aluminum facilitates the lossy interband transition outside visible spectrum, which is crucial for plasmonic colour production tunable across the visible region. Apart from that, when compared with gold, aluminum does not require an adhesion layer and with silver, it does not require a capping layer, which considerably eases the fabrication processes 17, 20â24 .Figure 1SEM image of the plasmonic pixels in the 2D array structure and its simple fabrication process steps. ( a ) SEM image of the Al square patches hovering on PMMA nano pillars periodically arranged in a square lattice in the background of a fishnet like Al back reflector, insets (i) shows the schematic rendering of a single plasmonic color element and (ii) the slightly tilted (tilt angle of 20°) close-up SEM image of the single colour element.…”
It has long been the interests of scientists to develop ink free colour printing technique using nano structured materials inspired by brilliant colours found in many creatures like butterflies and peacocks. Recently isolated metal nano structures exhibiting preferential light absorption and scattering have been explored as a promising candidate for this emerging field. Applying such structures in practical use, however, demands the production of individual colours with distinct reflective peaks, tunable across the visible wavelength region combined with controllable colour attributes and economically feasible fabrication. Herein, we present a simple yet efficient colour printing approach employing sub-micrometer scale plasmonic pixels of single constituent metal structure which supports near unity broadband light absorption at two distinct wavelengths, facilitating the creation of saturated colours. The dependence of these resonances on two different parameters of the same pixel enables controllable colour attributes such as hue, brightness and saturation across the visible spectrum. The linear dependence of colour attributes on the pixel parameters eases the automation; which combined with the use of inexpensive and stable aluminum as functional material will make this colour design strategy relevant for use in various commercial applications like printing micro images for security purposes, consumer product colouration and functionalized decoration to name a few.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citationsâcitations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
