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An accurate design of graphene oxide ultrathin flat lens based on Rayleigh-Sommerfeld theory

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Opto-Electronic Advances 2018年第7期1卷 8-14页

作者： guiyuan cao Xiaosong Gan Han Lin Baohua Jia Centre for Micro-Photonics Faculty of Engineering Science and Technology Swinburne University of Technology John Street Hawthorn VIC 3122 Australia

Graphene oxide （GO） ultrathin flat lenses have provided a new and viable solution to achieve high resolution, high efficiency, ultra-light weight, integratable and flexible optical systems. Current GO lenses are designed based on the Fresnel diffraction model, which uses a paraxial approximation for low numerical aperture （NA） focusing process. Herein we develop a lens design method based on the Rayleigh-Sommerfeld （RS） diffraction theory that is able to unambiguously determine the radii of each ring without the optimization process for the first time. More importantly, the RS design method is able to accurately design GO lenses with arbitrary NA and focal length. Our design is experimentally confirmed by fabricating high NA GO lenses with both short and long focal lengths. Compared with the conventional Fresnel design methods, the differences in ring positions and the resulted focal length are up to 13.9% and 9.1%, respectively. Our method can be further applied to design high performance flat lenses of arbitrary materials given the NA and focal length requirements, including metasurfaces or other two-dimensional materials.

关键词： ultrathin flat lens graphene oxide Rayleigh-Sommerfeld diffraction Fresnel diffraction

Graphene metalens for particle nanotracking

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Photonics Research 2020年第8期8卷 1316-1322页

作者： XUEYAN LI SHIBIAO WEI guiyuan cao HAN LIN YUEJIN ZHAO BAOHUA JIA Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Centre for Translational Atomaterials(CTAM) Swinburne University of TechnologyHawthornVIC 3122Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Particle nanotracking(PNT)is highly desirable in lab-on-a-chip systems for flexible and convenient multiparameter *** ultrathin flat lens is the preferred imaging device in such a system,with the advantage of high focusing performance and ***,PNT using ultrathin flat lenses has not been demonstrated so far because PNT requires the clear knowledge of the relationship between the object and image in the imaging *** a relationship still remains elusive in ultrathin flat lens-based imaging systems because they operate based on diffraction rather than *** this paper,we experimentally reveal the imaging relationship of a graphene metalens using nanohole arrays with micrometer *** distance relationship between the object and image as well as the magnification ratio is acquired with nanometer *** measured imaging relationship agrees well with the theoretical prediction and is expected to be applicable to other ultrathin flat lenses based on the diffraction *** analyzing the high-resolution images from the graphene metalens using the imaging relationship,3D trajectories of particles with high position accuracy in PNT have been *** revealed imaging relationship for metalenses is essential in designing different types of integrated optical systems,including digital cameras,microfluidic devices,virtual reality devices,telescopes,and eyeglasses,and thus will find broad applications.

关键词： glasses particle spacing

Broadband Diffractive Graphene Orbital Angular Momentum Metalens by Laser Nanoprinting

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Ultrafast Science 2023年第3期3卷 1-8页

作者： guiyuan cao Han Lin Baohua Jia Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyJohn StreetHawthornVIC 3122Australia. School of Science RMIT University124 La Trobe StreetMelbourneVictoria3000Australia. The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) RMIT University124 La Trobe StreetMelbourneVictoria3000Australia.

Optical beams carrying orbital angular momentum(OAM)play an important role in micro-/nanoparticle manipulation and information multiplexing in optical *** OAM generation setups require bulky optical elements and are unsuitable for on-chip *** generators based on metasurfaces can achieve ultracompact ***,they generally have limited working bandwidth and require complex designs and multistep time-consuming fabrication *** comparison,graphene metalenses based on the diffraction principle have simple designs and can be fabricated by laser nanoprinting in a single ***,we demonstrate that a single ultrathin(200 nm)graphene OAM metalens can integrate OAM generation and high-resolution focusing functions in a broad bandwidth,covering the entire visible wavelength *** graphene OAM metalenses with flexibly controlled topological charges are analytically designed using the detour phase method considering the dispersionless feature of the graphene material and fabricated using ultrafast laser *** experimental results agree well with the theoretical predictions,which demonstrate the accuracy of the design *** broadband graphene OAM metalenses can find broad applications in miniaturized and integrated photonic devices enabled by OAM beams.

关键词： printing Orbital consuming

High tolerance detour-phase graphene-oxide flat lens

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Photonics Research 2021年第12期9卷 2454-2463页

作者： SHIBIAO WEI guiyuan cao HAN LIN HAORAN MU WENBO LIU XIAOCONG YUAN MICHAEL SOMEKH BAOHUA JIA Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Centre for Translational Atomaterials Faculty of EngineeringScience and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Flat lenses thinner than a wavelength promise to replace conventional refractive lenses in miniaturized optical ***,Fresnel zone plate flat lens designs require dense annuli,which significantly challenges nanofabrication ***,we propose a new implementation of detour phase graphene flat lens with flexible annular number and *** graphene metalenses demonstrated that with a flexible selection of the line density and width,the metalenses can achieve the same focal length without significant *** will significantly weaken the requirement of the nanofabrication system which is important for the development of large-scale flat lenses in industry applications.

关键词： phase replace annular

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

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中国科学:技术科学英文版 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang YANG YunYi LIU CiHui DI YunSong cao guiyuan WEI ShiBiao CHEN ZhiHui GAN ZhiXing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

Broadband angular momentum cascade via a multifocal graphene vortex generator

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Chinese Optics Letters 2022年第10期20卷 91-95页

作者： Zhongwei Jin guiyuan cao Hongtao Wang Han Lin Baohua Jia Cheng-Wei Qiu College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Centre of Translational Atomaterials(CTAM) Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia School of Science RMIT UniversityMelbourneVIC 3000Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Light beams carrying orbital angular momentum(OAM)have inspired various advanced applications,and such abundant practical applications in turn demand complex generation and manipulation of optical ***,we propose a multifocal graphene vortex generator,which can produce broadband angular momentum cascade containing continuous integer non-diffracting vortex *** device naturally embodies a continuous spiral slit vortex generator and a zone plate,which enables the generation of high-quality continuous vortex modes with deep depths of ***,the generated vortex modes can be simultaneously tuned through incident wavelength and position of the focal *** elegant structure of the device largely improves the design efficiency and can be fabricated by laser nanofabrication in a single ***,the outstanding property of graphene may enable new possibilities in enormous practical applications,even in some harsh environments,such as aerospace.

关键词： optical vortex multifocus broadband wavelength tunability graphene

Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses

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Light(Science & Applications) 2020年第1期9卷 696-706页

作者： Han Lin Zai-Quan Xu guiyuan cao Yupeng Zhang Jiadong Zhou Ziyu Wang Zhichen Wan Zheng Liu Kian Ping Loh Cheng-Wei Qiu Qiaoliang Bao Baohua Jia Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityWellington RoadClaytonVIC 3800Australia School of Mathematical and Physical Sciences Faculty of ScienceUniversity of Technology Sydney15 BroadwayUltimoNSW 2007Australia Institute of Microscale Optoelectronics Lab of Artificial Microstructure for OptoelectronicsShenzhen University518000 ShenzhenChina School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Chemistry National University of SingaporeSingapore 117543Singapore Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia

Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive *** approach the atomically thin limit,the use of 2D materials is an attractive possibility due to their high refractive ***,achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing *** we report a universal method to transform 2D monolayers into ultrathin flat *** laser direct writing was applied to generate local scattering media inside a monolayer,which overcomes the longstanding challenge of obtaining sufficient phase or amplitude modulation in atomically thin 2D *** achieved highly efficient 3D focusing with subwavelength resolution and diffractionlimited *** high focusing performance even allows diffraction-limited imaging at different focal positions with varying *** work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.

关键词： ultrathin scattering optics

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外泌体在毛乳头细胞诱导毛发再生中的作用

华夏医学 2022年第3期35卷 129-134页

作者：曹贵媛祝宁侠桂林医学院广西桂林541199

毛乳头(DP)细胞能够诱导毛发再生,其表达高水平的雄激素受体是诱导功能丢失的重要原因。外泌体是多种细胞释放的膜结合纳米囊泡,直径约为30~150 nm,广泛存在于体液中,在细胞间通信中起重要作用。近期研究发现,外泌体能够维持毛乳头细胞... 详细信息

毛乳头(DP)细胞能够诱导毛发再生,其表达高水平的雄激素受体是诱导功能丢失的重要原因。外泌体是多种细胞释放的膜结合纳米囊泡,直径约为30~150 nm,广泛存在于体液中,在细胞间通信中起重要作用。近期研究发现,外泌体能够维持毛乳头细胞毛发诱导能力,促进毛发再生,但具体机制仍未明确。本文着眼于不同细胞来源的外泌体对毛乳头细胞诱导毛发再生相关研究做一综述,从而为脱发类疾病的实验研究和临床治疗提供新的思路。

关键词：外泌体毛乳头细胞毛发再生雄激素性脱发

水稻品种直播相关的种子低温和低氧萌发活力评价

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分子植物育种 2018年第10期16卷 3259-3268页

作者：曹微王燕谭斌刘伟储莉潘招远赵光苗曹桂元周玉亮华南农业大学农学院广东省植物分子育种重点实验室广州510642

提高水稻种子耐低温和低氧发芽能力是解决直播稻全苗问题的有效途径。本研究以23份用于构建染色体单片段代换系文库的水稻亲本为材料,在低温和低氧逆境下进行发芽试验,考察了15个种子活力相关的指标,通过多重比较分析、变异分析、主成... 详细信息

提高水稻种子耐低温和低氧发芽能力是解决直播稻全苗问题的有效途径。本研究以23份用于构建染色体单片段代换系文库的水稻亲本为材料,在低温和低氧逆境下进行发芽试验,考察了15个种子活力相关的指标,通过多重比较分析、变异分析、主成分分析和相关性分析等对供试品种进行了综合评价。结果表明,供试水稻品种的各项指标表现出广泛的变异,变异系数为0.10~0.64,变异系数最大的是15℃第7天的发芽率。通过主成分分析,低温和低氧下分别提取到3个和2个主成分,累计贡献率分别为86.3%和91.8%,两者之间无显著相关性。低温下综合排名前3的品种为W5(籽恢100)、W22(Khazar)和W2(Amol 3),低氧下综合排名前3的品种为W10(南洋占)、W22和W13(江西丝苗)。据散点图分析,23个品种被分为4类,6个低氧抗性低温感性型,6个低氧抗性低温抗性型,7个低氧感性低温抗性型,4个为低氧感性低温感性型,其中W22在低温和低氧条件下综合表现优良。本研究结果可以为直播稻新品种选育提供参考。

关键词：水稻直播低温发芽力低氧发芽力胚芽鞘主成分分析