Scalable, full-colour and controllable chromotropic plasmonic printing

Xue, Jiancai; Zhou, Zhang‐Kai; Wei, Zhiqiang; Su, Rongbin; Lai, Jianguo; Li, Juntao; Li, Chao; Zhang, Tengwei; Wang, Xuehua

doi:10.1038/ncomms9906

Cited by 173 publications

(148 citation statements)

References 41 publications

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“…Porous anodic alumina (PAA) formed by electrochemical anodization have already attracted great interest in commercial and various scientific and technological fields12345678910111213141516. Due to the advantages in stability, low-cost, operating convenience and technique compatibility, electrochemical anodization of aluminum surface is employed in the industrial processing to improve its performance, such as dyeing, anti-corrosion, anti-friction2 and anti-dewing3.…”

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confidence: 99%

Fabrication of Self-Ordered Alumina Films with Large Interpore Distance by Janus Anodization in Citric Acid

Wen

et al. 2016

Sci Rep

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Self-organized porous anodic alumina (PAA) formed by electrochemical anodization have become a fundamental tool to develop various functional nanomaterials. However, it is still a great challenge to break the interpore distance (Dint) limit (500 nm) by using current anodization technologies of mild anodization (MA) and hard anodization (HA). Here, we reported a new anodization mode named “Janus anodization” (JA) to controllably fabricate self-ordered PAA with large Dint at high voltage of 350–400 V. JA naturally occurs as anodizing Al foils in citric acid solution, which possessing both the characteristics of MA and HA. The process can be divided into two stages: I, slow pore nucleation stage similar to MA; II, unequilibrium self-organization process similar to HA. The as-prepared films had the highest modulus (7.0 GPa) and hardness (127.2 GPa) values compared with the alumina obtained by MA and HA. The optical studies showed that the black films have low reflectance (<10 %) in the wavelength range of 250–1500 nm and photoluminescence property. Dint can be tuned between 645–884 nm by controlling citric acid concentration or anodization voltage. JA is a potential technology to efficiently and controllably fabricate microstructured or hybrid micro- and nanostructured materials with novel properties.

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confidence: 99%

Fabrication of Self-Ordered Alumina Films with Large Interpore Distance by Janus Anodization in Citric Acid

Wen

et al. 2016

Sci Rep

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“…[ 5,39 ] The corresponding photographs of the fabricated samples are displayed in Figure 1 f (top row), which show four different large-area color fi lters with high saturation and brightness including blue, green, yellow, and purple, demonstrating the broad color coverage of this F-P type confi guration. Remarkably, the maximum refl ectivity reaches over 92% in simulation and was close to 90% in experiment, while the maximum absorptivity surpasses 99.6% in simulation and was also close to 90% in experiment.…”

Section: Communicationmentioning

confidence: 99%

Reflective Color Filters and Monolithic Color Printing Based on Asymmetric Fabry–Perot Cavities Using Nickel as a Broadband Absorber

Yang

Zhou

Chen

et al. 2016

Advanced Optical Materials

167

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COMMUNICATIONDue to its advantage and promising applications, many recent studies have been focused on the design of F-P cavities-based spectral fi lters. [ 35,36 ] For example, Aydin and coworkers proposed a perfect absorber comprised of planar Ag/SiO 2 /Ag cavity with a maximum absorption intensity of ≈97% and a narrow bandwidth of ≈17 nm. [ 37 ] Furthermore, the location of the absorption peak is tunable in the visible light range just by controlling the dielectric spacer thickness. Yang et al. obtained three primary RGB (red, green, and blue) refl ective colors with a low sensitivity to the incidence angle by fabricating asymmetrical resonant cavities comprised of an a-Si dielectric fi lm sandwiched by a thin chromium (Cr) layer and a thick silver (Ag) layer. [ 38 ] In their structure, Cr is adopted as the absorptive layer to absorb the incident light and the RGB fi lters are achieved by adjusting the thickness of the constituent layers. However, it is noteworthy that the purity and brightness of the existing proposed color fi lters to date are not suffi ciently high due to the narrow absorption peak and the relatively low refl ectivity in the wavelength range of the color we are interested in.In this work, F-P cavities-based refl ective color fi lters consisting of a layer of thin nickel (Ni) fi lm and a thick aluminum (Al) fi lm, separated by a silicon dioxide (SiO 2 ) dielectric layer, are demonstrated. We use a thin nickel (Ni) layer as a broadband absorber to obtain abundant structural colors with high saturation and brightness operating at visible range. Combined with grayscale patterning techniques, we also demonstrated that high-resolution, high-contrast monolithic color printing could be achieved enabled by this refl ective color-fi lter confi guration.The schematic confi guration of the proposed refl ective color fi lter is shown in Figure 1 a. It is an asymmetric F-P type resonator comprised of Ni/SiO 2 /Al triple-layer fi lm stacks, in which the refl ectivity of Ni and Al is very different. Ni was chosen to be the top metal because of its relatively uniform and appropriate refl ectivity and absorption in the entire visible light range which is essential to achieve broadband absorption for purer and brighter refl ective colors, as indicated by the simulated refl ectance and transmittance spectra in Figure 1 b. Al was adopted as a highly refl ective mirror at the bottom. SiO 2 is a lossless dielectric material in the visible range, which was used as the spacer layer, and its optical thickness d determines the position of the absorption and refl ectance peaks. Comparing to other designs using Ag as absorber and mirror, both Ni and Al in the confi guration have better adhesion property with SiO 2 and are also inexpensive for practical applications.Metal-based refl ective color fi lters, which display various colors by selectively refl ecting a specifi c wavelength in the visible region, have attracted tremendous interest in recent years as a crucial component for diverse applications, such as optical ...

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“…Surface plasmonic resonance (SPR) is considered to play an important role in the color filtering, where incident light couples to surface plasmon resonance first and then couples back to light via periodic hole array for wave vector matching . Since the first paper by Ebbesen et al in 1998, considerable efforts have been made to increase transmission, improve color purity, suppress angular sensitivity and improve design and fabrication efficiency . Hole shape, lattice structure, index matching layer and multi‐period array were investigated both numerically and experimentally. ii)The metal‐dielectric‐metal (MIM) grating color filters are based on the coupling between two metallic layers .…”

Section: Mechanisms Of Nanophotonic Color Filteringmentioning

confidence: 99%

Nanophotonic Image Sensors

Chen

Wen

et al. 2016

Small

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The increasing miniaturization and resolution of image sensors bring challenges to conventional optical elements such as spectral filters and polarizers, the properties of which are determined mainly by the materials used, including dye polymers. Recent developments in spectral filtering and optical manipulating techniques based on nanophotonics have opened up the possibility of an alternative method to control light spectrally and spatially. By integrating these technologies into image sensors, it will become possible to achieve high compactness, improved process compatibility, robust stability and tunable functionality. In this Review, recent representative achievements on nanophotonic image sensors are presented and analyzed including image sensors with nanophotonic color filters and polarizers, metamaterial‐based THz image sensors, filter‐free nanowire image sensors and nanostructured‐based multispectral image sensors. This novel combination of cutting edge photonics research and well‐developed commercial products may not only lead to an important application of nanophotonics but also offer great potential for next generation image sensors beyond Moore's Law expectations.

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Scalable, full-colour and controllable chromotropic plasmonic printing

Cited by 173 publications

References 41 publications

Fabrication of Self-Ordered Alumina Films with Large Interpore Distance by Janus Anodization in Citric Acid

Fabrication of Self-Ordered Alumina Films with Large Interpore Distance by Janus Anodization in Citric Acid

Reflective Color Filters and Monolithic Color Printing Based on Asymmetric Fabry–Perot Cavities Using Nickel as a Broadband Absorber

Nanophotonic Image Sensors

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