Structural color three-dimensional printing by shrinking photonic crystals

Liu, Yejing; Wang, Hao; Ho, Jinfa; Ng, Ryan C.; Ng, Ray Jia Hong; Hall-Chen, V. H.; Koay, Eleen H. H.; Dong, Zhaogang; Liu, Hailong; Qiu, Cheng‐Wei; Greer, Julia R.; Yang, Joel K. W.

doi:10.1038/s41467-019-12360-w

Cited by 236 publications

(135 citation statements)

References 47 publications

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“…Recent studies on biomimicking chameleon skin showed that CPC structures might have more potential applications in military, biomedicine, electroskin, and smart wearable devices [104,105]. Moreover, with the development of material science and technology, especially 3D/4D printing technology [106], there may be more potential for the development of new structures of CPCs. Combined with self-healable or biocompatible hydrogels [107,108], multi-sensitive and renewable HCPCs can be obtained via self-healing processes, and the future design of CPC glucose biosensors still has an exciting future.…”

Section: Summary and Perspectivementioning

confidence: 99%

Hydrogel-Based Colloidal Photonic Crystal Devices for Glucose Sensing

Tang

Chen

2020

Polymers

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Diabetes, a common epidemic disease, is increasingly hazardous to human health. Monitoring body glucose concentrations for the prevention and therapy of diabetes has become very important. Hydrogel-based responsive photonic crystal (PC) materials are noninvasive options for glucose detection. This article reviews glucose-sensing materials/devices composed of hydrogels and colloidal photonic crystals (CPCs), including the construction of 2D/3D CPCs and 2D/3D hydrogel-based CPCs (HCPCs). The development and mechanisms of glucose-responsive hydrogels and the achieved technologies of HCPC glucose sensors were also concluded. This review concludes by showing a perspective for the future design of CPC glucose biosensors with functional hydrogels.

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Section: Summary and Perspectivementioning

confidence: 99%

Hydrogel-Based Colloidal Photonic Crystal Devices for Glucose Sensing

Tang

Chen

2020

Polymers

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“…Recent advances in parallel TPP printing further promise dramatic improvements in fabrication throughput using this technology [85], [86]. Some examples of photonic structures fabricated using TPP include 3-D photonic crystals [87]- [90], photonic wire bonds [91]- [93], multi-lens objectives [94], [95], free-form refractive optical couplers [96], [97], and fiber to waveguide connector [98]. Compared to previously demonstrated refractive optical couplers, our design achieves significantly enhanced optical efficiencies and ultrabroadband performance through concurrent suppression of both chromatic aberration and monochromatic angle-dependent aberrations with simple quadratic reflective surfaces.…”

Section: Experimental Demonstration Of a Low-loss Free-form Wavegmentioning

confidence: 99%

Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface

Zuo

Sun³

et al. 2020

J. Lightwave Technol.

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Coupling of light between different photonic devices, for example on-chip waveguides, fibers, and free-space optical elements, is an essential function enabling integrated optical systems. Efficient optical coupling demands matching the optical mode profiles and effective indices in two devices, and often changing propagation direction of the light. To date, such coupling is predominantly accomplished via direct butt coupling of two devices, or meticulously optimized diffraction gratings. In this paper, we present a new coupling scheme based on microfabricated free-form optical reflectors. The free-form reflector simultaneously achieves the functions of light beam redirection and shaping (for mode matching), and can be versatilely adapted for coupling between photonic chips, fibers, and freespace surface-incident devices. We show that this technology uniquely fulfills all key performance requirements for optical interfaces with exceptionally low coupling loss (0.2-0.3 dB per coupler), large bandwidth (over half an octave), high density (large 2-D coupler arrays), polarization diversity, and superior alignment tolerance commensurate with passive alignment techniques. Preliminary experimental validation demonstrates waveguide-to-fiber coupling with a low insertion loss (IL) of 0.9 dB. We foresee that the technology will become a promising solution to the chip-level photonic interconnection and packaging challenges plaguing integrated photonics.

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“…Extended heating durations at elevated temperatures enables converting the material into amorphous glass or even crystalline ceramic substances [20]. Such templating expands the applications in photonics as the resizing of the object also results in material densification which in turn influences the refractive index [249] and improves the mechanical properties like strength and ductility [250]. Reprinted with permission from [248].…”

Section: Heat Treatmentmentioning

confidence: 99%

“…The first row is tilted SEM images of a representative woodpile photonic crystal before and after heating, the second and third rows are SEM images and corresponding brightfield reflection-mode optical micrographs of the woodpile photonic crystal with different shrinkage, respectively. Scale bars represent 10 m. Reprinted with permission from [249].…”

Section: Heat Treatmentmentioning

confidence: 99%

Photopolymerization Mechanisms at a Spatio-temporally Ultra-confined Light

Skliutas¹,

Lebedevaite²,

Kabouraki³

et al. 2020

Preprint

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Ultrafast laser 3D lithography based on non-linear light-matter interactions, widely known as multi-photon lithography (MPL), offers unrivaled precision rapid prototyping and flexible additive manufacturing options. 3D printing equipment based on MPL are already commercially available, yet there is still no comprehensive understanding of factors determining spatial resolution, accuracy, fabrication throughput, repeatability, and standardized metrology methods for the accurate characterization of the produced 3D objects and their functionalities. The photoexcitation mechanisms, spatial-control or photo-modified volumes, and the variety of processable materials are topics actively investigated. The complexity of the research field is underlined by limited understanding and fragmented knowledge of light-excitation and material response. Research to date has only provided case-specific findings on photoexcitation, chemical modification, and material characterization of the experimental data. In this review, we aim to provide a consistent and comprehensive summary of the existing literature on photopolymerization mechanisms under highly confined spatial and temporal conditions, where, besides the excitation and cross-linking, parameters such as diffusion, temperature accumulation, and the finite amount of monomer molecules start to become of critical importance. Key parameters such as, photoexcitation, polymerization kinetics, and the properties of the additively manufactured materials at the nanoscale in 3D are examined, whereas, the perspectives for future research and as well as emerging applications are outlined.

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Structural color three-dimensional printing by shrinking photonic crystals

Cited by 236 publications

References 47 publications

Hydrogel-Based Colloidal Photonic Crystal Devices for Glucose Sensing

Hydrogel-Based Colloidal Photonic Crystal Devices for Glucose Sensing

Optical Free-Form Couplers for High-density Integrated Photonics (OFFCHIP): A Universal Optical Interface

Photopolymerization Mechanisms at a Spatio-temporally Ultra-confined Light

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