Single‐Shot Reference‐Free Holographic Imaging using a Liquid Crystal Geometric Phase Diffuser

Oh, Jeong-hun; Lee, KyeoReh; Park, Yong Keun

doi:10.1002/lpor.202100559

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…Moreover, since the calibration and usage of such systems can be realized under well-defined or preferable environments, existing challenges associated with medium stability and/or calibration time consumption can become a matter of choice that can be balanced between application, complexity, and cost. For example, most recently, metasurface 179 and liquid crystal geometric phase diffusers 180 have been introduced to the field to tackle the calibration time consumption issue. The breakthrough of the applications of wavefront shaping, at least for static and moderately dynamic scenarios, is on the horizon.…”

Section: Discussion and Perspectivesmentioning

confidence: 99%

Wavefront shaping: A versatile tool to conquer multiple scattering in multidisciplinary fields

Zhong

et al. 2022

The Innovation

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Section: Discussion and Perspectivesmentioning

confidence: 99%

Wavefront shaping: A versatile tool to conquer multiple scattering in multidisciplinary fields

Zhong

et al. 2022

The Innovation

Self Cite

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“…[16][17][18] Some photochemical approaches have been proposed to direct the rational organization of LCs, thereby enabling novel functionalities and matching the burgeoning requirements of modern science and technology. [19][20][21][22] By these means, LC optical jigsaw puzzles, typically based on the Pancharatnam-Berry (PB) phase, offer a powerful route to control light propagation via reflection, [23] scattering, [24,25] and phase modulation, [26,27] supplying a versatile strategy to achieve a fascinating planar, compact and integrated system with impressive capability in stimuli responsiveness; this architecture is referred to as "soft photonics". Nevertheless, the stability of photoresponsive materials used in photochemical approaches is a major concern from the very beginning of their development.…”

Section: Introductionmentioning

confidence: 99%

Programmable Jigsaw Puzzles of Soft Materials Enabled by Pixelated Holographic Surface Reliefs

et al. 2023

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block to establish numerous ingenious applications, such as supramolecular engineering, [1] nanotechnology, [2] soft robotics, and mechanical metamaterials. [3,4] When scaling down the size of each piece of the jigsaw puzzle and extending the concealed information to contain both light polarization and phase, the concept of optical jigsaw puzzles aiming for programmable optics can be obtained. It is known that the functions of traditional optical elements are endowed by a complex phase wavefront, e.g., an imaging lens has a parabolashaped phase distribution, and a grating has a periodic phase distribution, [5,6] and are expressed using the curved interface between different optical materials in geometrical optics. Metasurfaces, [7,8] composed of pixelated nanoantennas with different parameters of orientation, size, aspect ratio, spacing, etc., to obtain delicate control over the optical phase, polarization, or amplitude, have attracted tremendous scientific and industrial interest. However, these materials face the challenges of limited size, complicated microfabrication, and the dynamic manipulation of optical performance, which are the main obstacles to promoting the commercialization of smart, adaptive, and programmable photonics.Manual intervention in the self-organization of soft matter to obtain a desired superstructure is a complex but significant project. Specifically, optical components made fully or partially from reconfigurable and stimuli-responsive soft materials, referred to as soft photonics, are poised to form versatile platforms in various areas; however, a limited scale, narrow spectral adaptability, and poor stability are still formidable challenges. Herein, a facile way is developed to program the optical jigsaw puzzle of nematic liquid crystals via pixelated holographic surface reliefs, leading to an era of manufacturing for programmable soft materials with tailored functions. Multiscale jigsaw puzzles are established and endowed with unprecedented stability and durability, further sketching a prospective framework toward customized adaptive photonic architectures. This work demonstrates a reliable and efficient approach for directly assembling soft matter, unlocking the long-sought full potential of stimuli-responsive soft systems, and providing opportunities to inspire the next generation of soft photonics and relevant areas.

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“…Recent advances in optical modulation mechanisms and computational imaging algorithms have overcome many physical limitations of traditional optical microscopy, promoting the pioneering progress of microscopic imaging techniques. Many emerging computational imaging technologies were developed, such as differential phase contrast imaging, [8][9][10] quantitative phase imaging, [11][12][13][14][15][16][17][18] high-throughput imaging, [19][20][21][22][23] refractive index diffraction tomography, [24,25] etc. These technologies provide unique optical imaging capabilities for various biological and medical applications.…”

Section: Introductionmentioning

confidence: 99%

Efficient Synthetic Aperture for Phaseless Fourier Ptychographic Microscopy with Hybrid Coherent and Incoherent Illumination

Fan

Sun

Shu

et al. 2022

Laser & Photonics Reviews

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Fourier ptychographic microscopy (FPM) is a computational high‐throughput technique for high‐resolution and wide field‐of‐view (FOV) imaging applications such as cell biology, medicine screening, and digital pathology. By integrating angle‐varied illumination, iteration phase retrieval, and synthetic aperture, it achieves a significantly enhanced imaging resolution beyond the diffraction limit of the objective lens while retaining its original large FOV without any mechanical movement. However, sufficient data redundancy is a prerequisite for the convergence of the iteration algorithm, which in turn requires dozens or even hundreds of raw images to get a decent resolution, leaving ample room for further improvement. In this paper, an efficient synthetic aperture scheme for FPM is proposed, termed ESA‐FPM. It employs both coherent and incoherent illuminations to maximize the efficiency of data utilization and achieve high spatial‐bandwidth product (SBP) reconstruction with few acquisitions. The data redundancy requirements are further analyzed, suggesting that ESA‐FPM reaches imaging resolution of 3NAobj$3NA_{\rm obj}$ using only seven images. The experiment with USAF target demonstrates that ESA‐FPM achieves theoretical resolution with only 1.6% of the data of conventional FPM. A customized miniaturized ESA‐FPM system with a high‐numerical‐aperture, low‐magnification objective lens, and a high‐brightness LED array is built, demonstrating its potential for biomedical and pathological applications.

show abstract

Single‐Shot Reference‐Free Holographic Imaging using a Liquid Crystal Geometric Phase Diffuser

Cited by 8 publications

References 48 publications

Wavefront shaping: A versatile tool to conquer multiple scattering in multidisciplinary fields

Wavefront shaping: A versatile tool to conquer multiple scattering in multidisciplinary fields

Programmable Jigsaw Puzzles of Soft Materials Enabled by Pixelated Holographic Surface Reliefs

Efficient Synthetic Aperture for Phaseless Fourier Ptychographic Microscopy with Hybrid Coherent and Incoherent Illumination

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