A5044445327- Advanced Optical Imaging Technologies
- Metamaterials and Metasurfaces Applications
- Virtual Reality Applications and Impacts
- Advanced Antenna and Metasurface Technologies
- Visual perception and processing mechanisms
- Orbital Angular Momentum in Optics
- Random lasers and scattering media
- Liquid Crystal Research Advancements
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Computer Graphics and Visualization Techniques
- Advanced Optical Sensing Technologies
- Optical Wireless Communication Technologies
- Digital Holography and Microscopy
- 3D IC and TSV technologies
- Topic Modeling
- Advanced Fluorescence Microscopy Techniques
- Ocular and Laser Science Research
- Electronic Packaging and Soldering Technologies
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Optical Coherence Tomography Applications
- Photorefractive and Nonlinear Optics
Sun Yat-sen University
2016-2025
Third Affiliated Hospital of Guangzhou Medical University
2024
Guangzhou Medical University
2024
Key Laboratory of Guangdong Province
2024
Guangdong University of Technology
2024
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2021-2023
Bridge University
2022-2023
State Key Laboratory of Optoelectronic Materials and Technology
2019-2023
Inner Mongolia Electric Power (China)
2023
Fano Labs (China)
2021-2023
Subwavelength imaging requires the use of high numerical aperture (NA) lenses together with immersion liquids in order to achieve highest possible resolution. Following exciting recent developments metasurfaces that have achieved efficient focusing and novel beam-shaping, race is on demonstrate ultrahigh-NA metalenses. The NA has been demonstrated so far = 1.1, a TiO2 metalens back-immersion. Here, we introduce transmission visible range, based crystalline silicon (c-Si). higher refractive...
Metalenses consist of nanostructures that locally control the optical phase. They offer many degrees freedom for manipulating a wavefront, which gives number advantages over bulk lenses, such as straightforward elimination spherical aberrations and an ultrathin dimension. Here, we compare phase profiles metalenses made different dielectric materials note advantage high refractive index materials. Higher silicon afford more in terms design fabrication are basis high-performance metalenses,...
Metalenses are nanostructured surfaces that mimic the functionality of optical elements. Many exciting demonstrations have already been made, for example, focusing into diffraction-limited spots or achromatic operation over a wide wavelength range. The key is yet missing, however, and most important applications such as smartphones virtual reality, ability to perform imaging function with single element field view. Here, by relaxing constraint on resolution, we demonstrate single-layer...
Abstract Augmented reality (AR) displays, as the next generation platform for spatial computing and digital twins, enable users to view images superimposed on real-world environment, fostering a deeper level of human-digital interactions. However, critical element in an AR system, optical combiners face unprecedented challenges match exceptional performance requirements human vision system while keeping headset ultracompact lightweight. After decades extensive device material research...
Abstract Virtual reality (VR) and augmented (AR) have found widespread applications in education, engineering, healthcare, entertainment. However, these near-eye displays are often bulky heavy, thus not suitable for long-term wearing. Metalenses, with an ultra-thin formfactor, subwavelength modulation scale, high flexibility, promising candidates to replace the conventional optics AR display systems. In this work, we proposed fabricated a novel reflective dielectric metalens-visor based on...
Virtual reality (VR) and augmented (AR) are revolutionizing our lives. Near-eye displays crucial technologies for VR AR. Despite the rapid advances in near-eye display technologies, there still challenges such as large field of view, high resolution, image quality, natural free 3D effect, compact form factor. Great efforts have been devoted to striking a balance between visual performance device compactness. While traditional optics nearing their limitations addressing these challenges,...
Chromatic aberration is a major challenge faced by metalenses. Current methods to achieve broadband achromatic operation in metalenses usually suffer from limited size, numerical aperture, and working bandwidth due the finite group delay of meta-atoms, thus restricting range practical applications. Multiwavelength can overcome those limitations, making it possible realize larger aperture (NA) sizes simultaneously. However, they require three layers, which increases their fabrication...
Human ability to visualize an image is usually hindered by optical scattering. Recent extensive studies have promoted imaging technique through turbid materials a reality where color can be restored behind scattering media in real time. The big challenge now recover objects large field of view with depth resolving ability. Based on the existing research results, we systematically study physical relationship between speckles generated from at different planes. By manipulating given single...
A full resolution, low crosstalk and wide viewing angle auto-stereoscopic display is demonstrated with the use of a novel free-form surface backlight (FFSB) technique, in conjunction hybrid spatial temporal control scenario. The overall coming from adjacent channels shown to be lower than 5% even at angle, minimum achievable can as small 2.41%. key element design giving rise achieving greater 45 degrees also presented.
Li-Ming Zhan, Haowen Liang, Bo Liu, Lu Fan, Xiao-Ming Wu, Albert Y.S. Lam. Proceedings of the 59th Annual Meeting Association for Computational Linguistics and 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers). 2021.
Flat optics have attracted interest for decades due to their flexibility in manipulating optical wave properties, which allows the miniaturization of bulky assemblies into integrated planar components. Recent advances achromatic flat lenses shown promising applications various fields. However, it is a significant challenge with high numerical aperture simultaneously achieve broad bandwidth and expand sizes. Here, we present zone division multiplex meta-atoms on stepwise phase dispersion...
We report a corrugated structure to effectively extract the surface plasmon polaritons (SPP) and waveguiding modes in organic light-emitting diodes (OLEDs). This is formed by nano-imprint of blazed gratings. To study optimum extraction condition terms grating pitches, we compare light efficiency OLEDs with three kinds showing 42.00% external quantum (EQE) enhancement ratio this internal structure. Due transfer SPP into substrate mode, EQE can be further pushed 103.02% attaching macrolens....
A novel design of an autostereoscopic display system with full resolution, low crosstalk, and weak Moiré pattern is presented. The involves the usage LED backlight array a liquid crystal (LCD) panel, in conjunction Fresnel lens array, to form 3D optical image system. finer temporal synchronization made possible dynamic synchronized backlight, so that scanning LCD phase array. systematic optimization presents HD, or even ultra for single left right channel. achieved minimum crosstalk 2.64%,...
We report an effective method to extract light from quantum-dot emitting diodes (QLEDs) by embedding internal nano-scattering pattern structure. use finite-difference time-domain analyze the extraction efficiency of red QLEDs with periodic, quasi-random, and random structures. Our simulation results indicate that can greatly enhance outcoupling while keeping wide viewing angle for QLED. Similar are obtained extending this approach green blue QLEDs. With proposed red, green, combination, we...
A figure-of-merit (FOM) of an auto-stereoscopic display system is introduced and adopted to characterize the performance. This FOM takes into account ratio signal noise arising from crosstalk adjacent channels as well brightness uniformity viewing areas; hence, it directly related glasses-free 3D comfort. With a steadily improving target, genetic algorithm applied optimize optical system, giving rise substantially improved characteristics system. The numerical simulation verified with...
Haode Zhang, Haowen Liang, Yuwei Li-Ming Zhan, Xiao-Ming Wu, Xiaolei Lu, Albert Lam. Proceedings of the 2022 Conference North American Chapter Association for Computational Linguistics: Human Language Technologies. 2022.
Metalenses are typically designed for a fixed focal length, restricting their functionality to static scenarios. Various methods have been introduced achieve the zoom function in metalenses. These methods, however, very limited range, or they require additional lenses direct imaging. Here, we demonstrate metalens based on axial movement that performs both imaging and function. The key innovation is use of polynomial phase profile mimics an aspheric lens, which allows extended depth focus,...
Bacterial vaginitis (BV) is a common vaginal disease. Vitamin E has been shown to reduce BV by enhancing immune function, but no studies have analyzed the relationship between vitamin and at different BMIs ages.
The correction of multiple aberrations in an optical system requires different elements, which increases its cost and complexity. Metasurfaces hold great promise to providing new functionality for miniaturized low-cost systems. A key advantage over their bulk counterparts is the metasurface's ability respond polarization light, adds a degree freedom design. Here, we show that control enables form-birefringent metalens correct both spherical off-axis using single element only, not possible...
Abstract Metalens research has made major advances in recent years. These rely on the simple design principle of arranging meta‐atoms regular arrays to create an arbitrary phase and polarization profile. Unfortunately, concept equally spaced reaches its limit for high deflection angles where efficiency decreases. The can be increased using nano‐antennas with multiple elements, but their sensitivity hinders application metalenses. Here, it is shown that by designing polarization‐insensitive...