A comprehensive review of optical diffusers: progress and prospects

Zhou, Le; Liu, Sijie; Zhong, Tingjun

doi:10.1039/d2nr04579f

Cited by 14 publications

(6 citation statements)

References 81 publications

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“…When the laser beam illuminates the ground glass, the widespread presence of numerous small scatterers causes the scattered light field to follow a Gaussian distribution in both the space and time domains. This phenomenon allows for the simulation of the statistical properties of thermal light [28,29]. In order to modify the randomness and achieve a non-Gaussian distribution of light fields, fabrication methods such as laserwrite metasurfaces need to be employed [30].…”

Section: Methodsmentioning

confidence: 99%

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Tian

Sun

et al. 2023

Photonics

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In this study, the influence of hybrid speckle patterns on the contrast-to-noise ratio (CNR) and resolution in pseudo-thermal ghost imaging (PGI) was examined based on the object dimensions in the macroscopic and microscopic regimes. This research shows that an enhanced scaling of the ghost image CNR and resolution from that of the hybrid speckle pattern was observed with the increase in speckle size for a macroscopic object, compared with the use of single-size speckle patterns. For microscopic objects, the hybrid speckle pattern also offered the advantage of retrieving ghost images even if the CNR followed the same trend as the resolution. These results were verified using two different slits with the same transmitted area. In addition, the numerical analysis revealed that the interference of the hybrid speckle pattern was the major factor for a better CNR. Based on these findings, the novel hybrid speckle pattern found in this research provides a possible way for future experiments in PGI to regulate hybrid speckle patterns to obtain a better ghost image quality.

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Section: Methodsmentioning

confidence: 99%

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Tian

Sun

et al. 2023

Photonics

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“…An optical diffuser is an element to scatter point and line light sources, and it holds significant importance in various applications such as displays, imaging systems, and optical sensors. , One representative example of an optical diffuser in bioapplications has been demonstrated by Elsherif and Butt. In their work, glucose sensors comprising microengineered optical diffuser structures and phenylboronic acid-based hydrogels were prepared through a fast and cost-effective imprinting process, and their concentration-sensitive scattering efficiency could lead to readout variations for real-time glucose monitoring .…”

Section: Pcms For Medical Devicesmentioning

confidence: 99%

Polymer Complex Multilayers for Drug Delivery and Medical Devices

Lang,

Huang,

Yang

et al. 2023

ACS Appl. Bio Mater.

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Polymer complex multilayers (PCMs) can be engineered into various structures with tunable properties via layer-by-layer (LBL) assembly driven by noncovalent forces. Due to their ease of preparation, capability of integrating multiple functional components, and excellent substrate compliance, biocompatible PCMs as coating materials or individual entities have attracted extensive attention in biomedical applications. This Spotlight on Applications presents recent progress on PCMs applied for drug delivery and medical devices. We provide several examples to address the importance of using PCM platforms to achieve controlled drug delivery including stimuli-triggered release, sustained release, and spatiotemporal sequential release. The effects of PCM coatings on the bioresponse regulation and performance enhancement of implantable devices are also highlighted. Moreover, the design and fabrication of flexible electrical and optical elements modified with LBL PCMs have been discussed, which demonstrates the great potential to advance emerging wearable devices for disease monitoring and health management.

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“…On the other hand, it can lead to diminishing ⅱ) wide-angle diffusion and/or ⅲ) low color dispersion, especially in the case that the size of incident light is small. Although various novel diffusers have been proposed 6,7 , most of these utilize multiple scattering and/or refraction. Thus, even novel diffusers, they also face the same challenges as conventional ones.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the optical diffuser inspired by Morpho butterflies for the feasible fabrication

Sakamoto,

Yamashita,

Ohga

et al. 2024

Bioinspiration, Biomimetics, and Bioreplication XIV

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Optical diffusers serve to a variety of applications by spreading incident light over a wide angular range. In general, the ideal conditions of the optical diffuser are to simultaneously satisfy high transmittance, wide angular spread, and low color dispersion. However, in the conventional diffusers based on scattering or refraction, the above conditions fall into tradeoff relationship, which make realization a challenge. Inspired by the specific color of Morpho butterflies that give simultaneously high reflectance, wide angular spread, and low color dispersion, we have recently proposed a design of new diffuser that satisfies the ideal conditions. However, our original design was difficult to fabricate because of its high aspect ratio at nanoscale. Then, we designed a new Morpho-type diffuser having double-step structures with disordered height for the feasible fabrication. The design was verified by numerical simulations, and the structural parameters were optimized. Finally, the optimal design was proposed with ideal optical properties, which is feasible to fabrication.

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A comprehensive review of optical diffusers: progress and prospects

Abstract: Optical diffusers made of polymer composite materials are vital for many photonics and optoelectronics such as backlight unit (BLU) in liquid crystal displays (LCDs), light extraction unit of organic light...

Cited by 14 publications

References 81 publications

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Polymer Complex Multilayers for Drug Delivery and Medical Devices

Optimization of the optical diffuser inspired by Morpho butterflies for the feasible fabrication

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