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| 1 | Fundamentals of phase-only liquid crystal on silicon (LCOS) devices显示文摘This paper describes the fundamentals of phase-only liquid crystal on silicon(LCOS)technology,which have not been previously discussed in detail.This technology is widely utilized in high efficiency applications for real-time holography and diffractive optics.The paper begins with a brief introduction on the developmental trajectory of phase-only LCOS technology,followed by the correct selection of liquid crystal(LC)materials and corresponding electro-optic effects in such devices.Attention is focused on the essential requirements of the physical aspects of the LC layer as well as the indispensable parameters for the response time of the device.Furthermore,the basic functionalities embedded in the complementary metal oxide semiconductor(CMOS)silicon backplane for phase-only LCOS devices are illustrated,including two typical addressing schemes.Finally,the application of phase-only LCOS devices in real-time holography will be introduced in association with the use of cutting-edge computer-generated holograms. | Zichen Zhang Zheng You Daping Chu | 2014 | Light(Science & Applications)2014，3，1： | 25 |
| 2 | Study of high-precision earth sensor with triple-FOV显示文摘Earth sensors are widely used in spacecraft for attitude determination. They need to have a very large field of view(FOV)( > 120°) and relatively low accuracy while being used in the aircrafts around orbit. A triple-FOV infrared earth sensor is proposed in this paper. It uses three pieces of standard infrared detectors with a wavelength range of 14;16μm,to sense the horizontal circle by detecting the infrared light emitted from the earth. From which,the geocentric vector can be obtained. A mathematic model is established and a validation model is set up to provide input parameters for the mathematic model. The simulation results of the two models show that the output of the mathematic model coincides with the known parameters. Based on the above analysis,a prototype has been built and tested. The test results show that the angle measurement error is about 0. 002° and hence such a triple-FOV earth sensor is capable to provide high-precision position information for autonomous navigation. | WANG Hongjian XING Fei YOU Zheng CHU Daping ZHENG Lungui | 2014 | Instrumentation2014，1，2： | 6 |
| 3 | A high-resolution optically addressed spatial light modulator based on ZnO nanoparticles显示文摘An optically addressed spatial light modulator(OASLM)can modulate the wavefront of a read light by displaying a phase pattern or a hologram configured by the intensity distribution of a write light.Using ZnO nanoparticles(NPs)as a novel photoconductor,a high-resolution OASLM was fabricated.A ZnO NP suspension was spin-coated on an indium tin oxide(ITO)-coated glass substrate and annealed to form a photosensitive layer.The device was characterized electrically and optically.The device was operated at low driving voltages in the transmission mode.Updatable recording of a diffraction grating up to 825 lp mm^(-1) with a diffraction efficiency(DE)of 0.05%and binary holograms with pixel sizes from 2 mm down to 0.72 mm were demonstrated using a 405 nm wavelength write laser and a 635 nm wavelength read laser. | Pawan Kumar Shrestha Young Tea Chun Daping Chu | 2015 | Light(Science & Applications)2015，4，1： | 5 |
| 4 | Overview of one transistor type of hybrid organic ferroelectric non-volatile memory显示文摘Organic ferroelectric memory devices based on field effect transistors that can be configured between two stable states of on and off have been widely researched as the next generation data storage media in recent years.This emerging type of memory devices can lead to a new instrument system as a potential alternative to previous non-volatile memory building blocks in future processing units because of their numerous merits such as cost-effective process,simple structure and freedom in substrate choices.This bi-stable non-volatile memory device of information storage has been investigated using several organic or inorganic semiconductors with organic ferroelectric polymer materials.Recent progresses in this ferroelectric memory field,hybrid system have attracted a lot of attention due to their excellent device performance in comparison with that of all organic systems.In this paper,a general review of this type of ferroelectric non-volatile memory is provided,which include the device structure,organic ferroelectric materials,electrical characteristics and working principles.We also present some snapshots of our previous study on hybrid ferroelectric memories including our recent work based on zinc oxide nanowire channels. | Young Tea Chun Daping Chu | 2015 | Instrumentation2015，2，1： | 3 |
| 5 | Accommodation-Free Head Mounted Display with Comfortable 3D Perception and an Enlarged Eye-box显示文摘An accommodation-free displays,also known as Maxwellian displays,keep the displayed image sharp regardless of the viewer’s focal distance.However,they typically sufer from a small eye-box and limited efective feld of view(FOV)which requires careful alignment before a viewer can see the image.Tis paper presents a high-quality accommodation-free head mounted display(aHMD)based on pixel beam scanning for direct image forming on retina.It has an enlarged eye-box and FOV for easy viewing by replicating the viewing points with an array of beam splitters.A prototype aHMD is built using this concept,which shows high defnition,low colour aberration 3D augmented reality(AR)images with an FOV of 36∘.Te advantage of the proposed design over other head mounted display(HMD)architectures is that,due to the narrow,collimated pixel beams,the high image quality is unafected by changes in eye accommodation,and the approach to enlarge the eye-box is scalable.Most importantly,such an aHMD can deliver realistic three-dimensional(3D)viewing perception with no vergence-accommodation confict(VAC).It is found that viewing the accommodation-free 3D images with the aHMD presented in this work is comfortable for viewers and does not cause the nausea or eyestrain side efects commonly associated with conventional stereoscopic 3D or HMD displays,even for all day use. | Pawan K.Shrestha Matt J.Pryn Jia Jia Jhen-Si Chen Hector Navarro Fructuoso Atanas Boev Qing Zhang Daping Chu | 2019 | Research2019，，1： | 3 |
| 6 | Holobricks:modular coarse integral holographic displays显示文摘Here,we propose and demonstrate a modular holographic display system that allows seamless spatial tiling of multiple coarse integral holographic(CIH)displays called'holobricks'.A holobrick is a self-contained CIH module enclosing a spatial light modulator(SLM),a scanner,and periscopic coarse integral optics.Modular CIH uses a coarse pitch and small area but high-bandwidth SLM in conjunction with periscopic coarse integral optics to form the angularly tiled 3D holograms with large viewing areas and fields of view.The creation of periscopic coarse integral optics prevents the optical system from being larger than the holographic image and allows the holographic fringe pattern to fill the entire face of the holobrick.Thus,multiple holobricks can be seamlessly abutted to form a scalable spatially tiled holographic image display capable of both wide feld-of-view angle and arbitrary large-size area.We demonstrate an initial prototype that seamlessly tiles two holobricks each with 1024×768 pixels,40°FOV,full color,24 fps,displaying 2D,3D holographic stereograms,and full parallax 3D CGI Fresnel holograms. | Jin Li Quinn Smithwick Daping Chu | 2022 | Light(Science & Applications)2022，11，4： | 2 |
| 7 | Rapid hologram generation utilizing layer-based approach and graphic rendering for realistic three- dimensional image reconstruction by angular tiling显示文摘 | Chen J S Chu Daping Smithwick Q | 2014 | Journal of Electronic Imaging2014，23，02： | 1 |
| 8 | Auxiliary resonant scanner to increase the scanning capability of coarse integral holographic displays显示文摘This Letter proposes a scanned holographic display system that takes the advantage of a high-speed resonant scanner to augment a galvanometer and hence improves the opto-mechanical information distribution capabilities,thereby potentially achieving an increased image size and enlarged viewing angles. | Jhen-Si Chen Quinn Smithwick Jin Li Daping Chu | 2017 | Chinese Optics Letters2017，15，4： | 0 |
| 9 | Harnessing decellularised extracellular matrix microgels into modular bioinks for extrusion-based bioprinting with good printability and high post-printing cell viability显示文摘The printability of bioink and post-printing cell viability is crucial for extrusion-based bioprinting.A proper bioink not only provides mechanical support for structural fidelity,but also serves as suitable three-dimensional(3D)microenvironment for cell encapsulation and protection.In this study,a hydrogel-based composite bioink was developed consisting of gelatin methacryloyl(GelMA)as the continuous phase and decellularised extracellular matrix microgels(DMs)as the discrete phase.A flow-focusing microfluidic system was employed for the fabrication of cell-laden DMs in a high-throughput manner.After gentle mixing of the DMs and GelMA,both rheological characterisations and 3D printing tests showed that the resulting DM-GelMA hydrogel preserved the shear-thinning nature,mechanical properties,and good printability from GelMA.The integration of DMs not only provided an extracellular matrix-like microenvironment for cell encapsulation,but also considerable shear-resistance for high post-printing cell viability.The DM sizes and inner diameters of the 3D printer needles were correlated and optimised for nozzle-based extrusion.Furthermore,a proof-of-concept bioink composedg of RSC96 Schwann cells encapsulated DMs and human umbilical vein endothelial cell-laden GelMA was successfully bioprinted into 3D constructs,resulting in a modular co-culture system with distinct cells/materials distribution.Overall,the modular DM-GelMA bioink provides a springboard for future precision biofabrication and will serve in numerous biomedical applications such as tissue engineering and drug screening. | Hanyu Chu Kexin Zhang Zilong Rao Panpan Song Zudong Lin Jing Zhou Liqun Yang Daping Quan Ying Bai | 2023 | Biomaterials Translational2023，4，2： | 0 |
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