Floating solid-state thin films with dynamic structural colour

Yan, Zhibin; Zhang, Zheng; Wu, Weikang; Ji, Xinglong; Sun, Shang; Jiang, Yu; Tan, C. S.; Yang, Le; Chong, Chong Tow; Qiu, Cheng‐Wei; Zhao, Rong

doi:10.1038/s41565-021-00883-7

Cited by 54 publications

(51 citation statements)

References 40 publications

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“…In addition, the achieved color saturation has a strong dependence on the incidence angle and polarization due to the nature of q-BIC resonances. The achieved highly saturated red could be potentially scaled up, e.g., via deep ultraviolet lithography and nano-imprint lithography ( 34 ), to reach the dimensions of reflective displays based on multilayer film configuration ( 35 ) and lead to potential applications of compact red filters ( 36 ), highly saturated reflective displays ( 22 , 37 ), nonlocal metasurfaces ( 38 ), and miniaturized spectrometers ( 39 ).…”

Section: Introductionmentioning

confidence: 99%

“…The achieved highly saturated red could be potentially scaled up, e.g. via deep UV lithography 38 , to reach the dimensions of reflective displays based on multi-layer film configuration [39][40][41] and lead to potential applications of compact red filters, 42 highly saturated reflective displays 26,43,44 and miniaturized spectrometers. [45][46][47] Design of BIC antenna array for achieving the ideal Schrödinger's red pixel.…”

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confidence: 99%

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Schrödinger’s red pixel by quasi-bound-states-in-the-continuum

et al. 2022

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While structural colors are ubiquitous in nature, saturated reds are mysteriously absent. This long-standing problem of achieving Schrödinger’s red demands sharp transitions from “stopband” to a high-reflectance “passband” with total suppression of higher-order resonances at blue/green wavelengths. Current approaches based on nanoantennas are insufficient to satisfy all conditions simultaneously. Here, we designed Si nanoantennas to support two partially overlapping quasi–bound-states-in-the-continuum modes with a gradient descent algorithm to achieve sharp spectral edges at red wavelengths. Meanwhile, high-order modes at blue/green wavelengths are suppressed via engineering the substrate-induced diffraction channels and the absorption of amorphous Si. This design produces possibly the most saturated and brightest reds with ~80% reflectance, exceeding the red vertex in sRGB and even the cadmium red pigment. Its nature of being sensitive to polarization and illumination angle could be potentially used for information encryption, and this proposed paradigm could be generalized to other Schrödinger’s color pixels.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Schrödinger’s red pixel by quasi-bound-states-in-the-continuum

et al. 2022

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“…Photonic crystals (PCs) 1 − 3 with brilliant structural colors have attracted wide attention due to their growing applications in the fields of displays, 4 − 10 printings, 11 − 17 pigments, 18 − 25 sensors, 26 − 32 coding–decoding, 33 − 36 photocatalysis, 37 , 38 and anti-counterfeiting. 39 − 47 As a member of PCs, colloidal PCs self-assembled from the colloidal particles have attracted considerable interest since the particles can be fabricated in a large scale with low cost in an efficient way.…”

Section: Introductionmentioning

confidence: 99%

Photo-Luminescent Photonic Crystals for Anti-Counterfeiting

Huang

Yang

et al. 2022

ACS Omega

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The conventional photonic crystals (PCs) are usually prepared by the self-assembly of silica or polystyrene particles. However, their applications are limited significantly due to the lack of the functions of the building blocks. Here, a new kind of photo-luminescent photonic crystals (PLPCs) with brilliant PL and structural colors were prepared by the self-assembly of dye-doped silica particles. The PL and structural colors of PCs can be well-controlled by altering the species of dyes and the size of the particles, respectively. Based on these advantages, PLPC patterns with encrypted information were fabricated through the combination of PLPCs and PCs with similar structural colors but diverse PL colors. These patterns can reversibly hide and display the encrypted information under sunlight and UV illumination, respectively. This work paves a new way for constructing functional PCs and will promote their applications in anti-counterfeiting, smart labels, and optical devices.

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“…The use of electrostatic forces to align plasmonic resonant metal nanorods to generate colors has also been shown ( 34 ). Very recently, thin films with reversible gate-tunable color switching were also demonstrated ( 35 ). The disadvantages of these techniques are that either their color switching speed is slow, or it is difficult to individually control pixels, or they do not greatly simplify the composite materials required to manufacture the display—while the number of materials in the display unit is closely related to the end-of-life-cycle management ( 2 , 3 , 8 ).…”

Section: Introductionmentioning

confidence: 99%

MEMS cantilever–controlled plasmonic colors for sustainable optical displays

et al. 2022

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Conventional optical displays using indium tin oxide and liquid crystal materials present challenges for long-term sustainability. We show here a cost-effective and complementary metal-oxide semiconductor (CMOS)–compatible fast and full-range electrically controlled RGB color display. This is achieved by combining transmission-based plasmonic metasurfaces with MEMS (microelectromechanical systems) technology, using only two common materials: aluminum and silicon oxide. White light is filtered into RGB components by plasmonic metasurfaces made of aluminum nanohole arrays. The transmission through each color filter is modulated by MEMS miniaturized cantilevers fabricated with aluminum and silicon oxide on top of the color filters. We show that the relative transmission of a color subpixel can be freely modulated from 35 to 100%. The pixels can also operate well above 800 Hz for future ultrafast displays. Our work provides a road to future circular economic goals by exploiting advances in structural colors and MEMS technologies to innovate optical displays.

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Floating solid-state thin films with dynamic structural colour

Cited by 54 publications

References 40 publications

Schrödinger’s red pixel by quasi-bound-states-in-the-continuum

Schrödinger’s red pixel by quasi-bound-states-in-the-continuum

Photo-Luminescent Photonic Crystals for Anti-Counterfeiting

MEMS cantilever–controlled plasmonic colors for sustainable optical displays

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