Structural Color Circulation in a Bilayer Photonic Crystal by Increasing the Incident Angle

Wu, Shao-Yi; Liu, Tengfei; Tang, Bingtao; Lu, Li; Zhang, Shufen

doi:10.1021/acsami.8b21092

Cited by 74 publications

(78 citation statements)

References 34 publications

(54 reference statements)

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“…The structural color and the stop band of photonic crystals can be controlled through altering the lattice constant, refractive index, or the orientations of ordered structures. These unique properties enable PCs to show considerable applications in color display, [ 1–8 ] sensing, [ 9–22 ] printing, [ 23–29 ] anticounterfeiting, [ 30–38 ] photocatalysis, [ 39–41 ] optical device, [ 42–46 ] and solar energy. [ 47–50 ]…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

Yang

Chen

et al. 2020

Part & Part Syst Charact

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printing, [23][24][25][26][27][28][29] anticounterfeiting, [30][31][32][33][34][35][36][37][38] photo catalysis, [39][40][41] optical device, [42][43][44][45][46] and solar energy. [47][48][49][50] According to the order degree of the structures, the PCs can be divided into highly ordered photonic crystals (OPCs) and amorphous photonic crystals (APCs). These two kinds of PCs show considerable difference in the optical properties. The OPCs with long-range ordered structures show iridescent structural colors, while the APCs with only short-range order exhibit non-iridescent structural colors. For some applications, such as color displays or sensors, [51][52][53][54] angle independent colors are necessary and required. In this regard, APCs with angle independent structural colors show inherent advantages than the OPCs owing to the amorphous packing of the particles. However, the fabrication of APCs remains a big challenge. In particular, the charged colloidal particles tend to crystalize and form long-range order upon the assembly process, which make it rather difficult to prepare APCs.Recently, there have been attempts to fabricate APCs through the dynamic or thermodynamic controlling the assembly process. Spray [55,56] and infiltration [57] are efficient in preparing APCs based on the rapid remove of solvents from the colloidal solution, respectively. In both approaches, the fast remove of solvents will break the longrange packing tendency of particles, resulting in the shortrange order. However, the usage of the environmentally harmful solvent or porous substrates in these two methods will limit their practical utility. Layer by layer strategy [58] is promising in preparing APCs based on consecutively polyelectrolyte coating process but subjected to the tedious and time-consuming processes. Although the bi-disperse suspension [59,60] is successful for fabrication of APCs, it is essential to control the difference in particle size to guarantee the bright colors of APCs. Alternatively, APCs can be fabricated by the self-assembly of soft particles. [61,62] With this approach, subtle fabrications must be well controlled to ensure the success of controlling the thickness of the shell and the assembly of soft particles. Except for the fabrication, the APCs usually exhibit pale structural colors due to the strong multiple scattering light. To deal with this problem, carbon black or other black particles are introduced into the APCs to absorb the Facile and efficient fabrication of amorphous photonic crystals (APCs) with uniform and angle independent structural colors is highly desired due to their unique applications in non-iridescent colors-based displays, pigments, and sensors. Here, a solvent-assisted colloidal assembly approach is reported to fabricate APCs with uniform and angle-independent structural colors by the self-assembly of polydopamine-embedded silica particles in pentanol. The surface charge of the particle mediated by the polarity of solvent is demonstrated to be the key to control the particle arrangeme...

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Section: Introductionmentioning

confidence: 99%

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

Yang

Chen

et al. 2020

Part & Part Syst Charact

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“…The bandgap of top layer becomes narrower and stronger upon the increase of the thickness. At the same time, the transmittance of the top layer will decrease due to the scattering of the spheres (see Figure e) . What is more, the reflected light from the bottom layer will be greatly reduced (see Figure a).…”

Section: Resultsmentioning

confidence: 93%

“…As shown in Figure d (Transmission Mode 1), with increasing thickness of the “Layer B”, the Bragg diffraction effect of Layer B increases, the transmission in the band of 500–600 nm was greatly reduced. At the same time, the increase of the thickness of Layer B undoubtedly increases the probability that the reflected light of “Layer A” will be scattered.…”

Section: Resultsmentioning

confidence: 95%

“…Under the specular reflection angle, however, BIHPC films selectively display vivid iridescent colors of the “Layer B” when the “Layer B” is pointing up. Because the strong Bragg diffraction and the increased scattering of random light of “Layer B”, the reflected light of “Layer A” was scattered . As shown in Figure e and Figure S12 (Supporting Information), it is obviously observed that the increased thickness of the “Layer B” indeed enlarges the scattering effect and decreases the transmittance.…”

Section: Resultsmentioning

confidence: 96%

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New Encryption Strategy of Photonic Crystals with Bilayer Inverse Heterostructure Guided from Transparency Response

Chu

Niu

et al. 2019

Adv Funct Materials

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122

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Combining functional response materials into colloidal photonic crystals is an accepted encryption strategy for information security. Here, bilayer inverse heterostructure photonic crystals that enable instantaneously transparentizing of the top layer and simultaneously releasing the reflected light of the bottom layer when exposed to ethanol are reported. The transition can quickly return to its original state after the evaporation of ethanol. In addition, the bilayer film is responsive to water, which shows redshift of the bandgap position. The mechanism of the design involves optical scattering and diffraction in the fabricated periodic nanostructures and uses the infiltration and capillary evaporation of fluids with low surface tension to realize the spectral diversity of reflectance. The effects of scattering and color superposition of the upper layer can be obliterated and re-established for the fact of the infiltration and capillary evaporation of fluids with low surface tension; meanwhile, it provisionally displays the pattern of the bottom layer. Multiple reversible ways to hide and display information could be easily realized by these characteristics. Reconfigurable bilayer inverse heterostructure photonic crystals simultaneously provide a simple and sensitive optical technique for investigating the intriguing encryption effects at the nanoscale.

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“…[ 32,33 ] The change of the lattice parameters and observation angle can cause color change, which can be applied to achieve the anti‐counterfeiting effect. [ 34,35 ] Besides the iridescent structural color, the angle‐independent structural color also was widely concerned because it can reduce the interference of the observation angle. Thus, it is a great challenge to construct novel thermal response photonic crystal with obvious response signal and large viewing angle by the change of non‐array parameter.…”

Section: Introductionmentioning

confidence: 99%

Thermal Responsive Photonic Crystal Achieved through the Control of Light Path Guided by Phase Transition

Liu

Zhang

Yao

et al. 2020

Small

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Responsive photonic crystal is widely considered in the field of anti‐counterfeiting and information encryption because of their structural color changes caused by external stimulation. However, the response signal is usually achieved by adjusting the periodic lattice constant based on Bragg's law with volume changes. Thus, it is a great challenge to achieve the response of photonic crystals by non‐array parameter control. Herein, novel thermal responsive photonic crystal (TRPC) with low angle dependent structural color is fabricated by introducing poly(ethylene glycol) into the structure of low angle dependent SnO2 inverse opal. The response is achieved through the control of light path guided by phase transition and the significant volume change caused by the change of traditional array parameters can be effectively avoided. Meanwhile, the low angle dependent structural color of TRPC can effectively reduce the interference of observation angle change to response signal caused by external thermal stimulation. Patterned responsive photonic crystals with temperature gradient response are easily obtained by combining confinement self‐assembly and direct template method, and the patterns can be presented and hidden by the control of light path, showing great potential in anti‐counterfeiting and information encryption fields.

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Structural Color Circulation in a Bilayer Photonic Crystal by Increasing the Incident Angle

Cited by 74 publications

References 34 publications

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

Highly Efficient Fabricating Amorphous Photonic Crystals Using Less Polar Solvents and the Wettability‐Based Information Storage and Recognition

New Encryption Strategy of Photonic Crystals with Bilayer Inverse Heterostructure Guided from Transparency Response

Thermal Responsive Photonic Crystal Achieved through the Control of Light Path Guided by Phase Transition

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