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Perovskite photodetector-based single pixel color camera for artificial vision

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Light(Science & Applications) 2023年第4期12卷 509-511页

作者： Chaohao Chen Ziyuan Lie Lan Fu School of Electrical and Data Engineering Faculty of Engineering and Information TechnologyThe University of Technology SydneySydneyNSW 2007Australia Australlian research Council centre of Excellence for Transformative Meta-Optical Systems Department of Electronic Materials EngineeringResearch School of PhysicsThe Australian National UniversityCanberraACT 2600Australia MoE Key Lab of Photoelectronic Imaging Technology and System School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Narrowband red,green,blue self-filtering perovskite photodetectors and a broadband white photodetector are incorporated into a single pixel imaging camera to mimic the long-,medium-,and short-wavelength cone cells and... 详细信息

关键词： artificial pixel filtering

Enhanced light-matter interactions in dielectric nanostructures via machine-learning approach

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Advanced photonics 2020年第2期2卷 57-67页

作者： Lei Xu Mohsen Rahmani Yixuan Ma Daria ASmirnova Khosro Zangeneh Kamali Fu Deng Yan Kei Chiang Lujun Huang Haoyang Zhang Stephen Gould Dragomir N.Neshev Andrey E.Miroshnichenko University of New South Wales School of Engineering and Information TechnologyCanberraAustralia Nottingham Trent University School of Science&TechnologyDepartment of EngineeringAdvanced Optics and Photonics LaboratoryNottinghamUnited Kingdom australian National University Research School of PhysicsNonlinear Physics CentreCanberraAustralia australian National University Research School of PhysicsARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS)CanberraAustralia Queensland University of Technology School of Electrical Engineering and Computer ScienceBrisbaneQueenslandAustralia australian National University College of Engineering and Computer ScienceCanberraAustralia

A key concept underlying the specific functionalities of metasurfaces is the use of constituent components to shape the wavefront of the light on *** are versatile,novel platforms for manipulating the scattering,color,phase,or intensity of ***,one of the typical approaches for designing a metasurface is to optimize one or two variables among a vast number of fixed parameters,such as various materials’properties and coupling effects,as well as the geometrical ***,this would require multidimensional space optimization through direct numerical ***,an alternative,popular approach allows for reducing the computational cost significantly based on a deep-learning-assisted *** utilize a deep-learning approach for obtaining high-quality factor(high-Q)resonances with desired characteristics,such as linewidth,amplitude,and spectral *** exploit such high-Q resonances for enhancedlight–matter interaction in nonlinearoptical metasurfaces and optomechanical vibrations,*** demonstrate that optimized metasurfaces achieve up to 400-fold enhancement of the third-harmonic generation;at the same time,they also contribute to 100-fold enhancement of the amplitude of optomechanical *** approach can be further used to realize structures with unconventional scattering responses.

关键词： machine learning dielectric nanostructures Fano resonance third-harmonic generation optoacoustics

Efficient CO_(2)Reduction to Formate on CsPbI_(3) Nanocrystals Wrapped with Reduced Graphene Oxide

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Nano-Micro Letters 2023年第10期15卷 1-14页

作者： Minh Tam Hoang Chen Han Zhipeng Ma Xin Mao Yang Yang Sepideh Sadat Madani Paul Shaw Yongchao Yang Lingyi Peng Cui Ying Toe Jian Pan Rose Amal Aijun Du Tuquabo Tesfamichael Zhaojun Han Hongxia Wang School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia School of Chemical Engineering The University of New South WalesKensingtonNSW 2052Australia centre for Organic photonics&Electronics(COPE) School of Chemistry and Molecular BiosciencesThe University of QueenslandBrisbaneQLD 4072Australia School of Engineering The University of NewcastleCallaghanNSW 2038Australia

Transformation of greenhouse gas(CO_(2))into valuable chemicals and fuels is a promising route to address the global issues of climate change and the energy *** halide perovskite catalysts have shown their potential in promoting CO_(2)reduction reaction(CO_(2)RR),however,their low phase stability has limited their application ***,we present a reduced graphene oxide(rGO)wrapped CsPbI_3 perovskite nanocrystal(NC)CO_(2)RR catalyst(CsPbI_3/rGO),demonstrating enhanced stability in the aqueous *** CsPbI_3/rGO catalyst exhibited>92%Faradaic efficiency toward formate production at a CO_(2)RR current density of~12.7 mA cm^(-2).Comprehensive characterizations revealed the superior performance of the CsPbI_3/rGO catalyst originated from the synergistic effects between the CsPbI_3 NCs and rGO,i.e.,rGO stabilized theα-CsPbI_3 phase and tuned the charge distribution,thus lowered the energy barrier for the protonation process and the formation of~*HCOO intermediate,which resulted in high CO_(2)RR selectivity toward *** work shows a promising strategy to rationally design robust metal halide perovskites for achieving efficient CO_(2)RR toward valuable fuels.

关键词： Perovskite nanocrystal Electrocatalyst Inorganic perovskite CO_(2)reduction Formate production

Electrically programmable solid-state metasurfaces via flash localised heating

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Light(Science & Applications) 2023年第3期12卷 391-397页

作者： Khosro Zangeneh Kamali Lei Xu Nikita Gagrani Hark Hoe Tan Chennupati Jagadish Andrey Miroshnichenko Dragomir Neshev Mohsen Rahmani ARC centre of Excellence for Transformative Meta-Optical Systems(TMOS) Research School of PhysicsThe Australian National UniversityCanberraACT 2601Australia Advanced Optics and photonics Laboratory Department of EngineeringSchool of Science and TechnologyNottingham Trent UniversityNottinghamNG118NSUK School of Engineering and Information Technology University of New South WalesCanberraACT 2600Australia

In the last decades,metasurfaces have attracted much attention because of their extraordinary light-scattering ***,their inherently static geometry is an obstacle to many applications where dynamic tunability in their optical behaviour is ***,there is a quest to enable dynamic tuning of metasurface properties,particularly with fast tuning rate,large modulation by small electrical signals,solid state and programmable across multiple ***,we demonstrate electrically tunable metasurfaces driven by thermo-optic effect and flash-heating in *** show a 9-fold change in transmission by<5 V biasing voltage and the modulation rise-time of<625µ*** device consists of a silicon hole array metasurface encapsulated by transparent conducting oxide as a localised *** allows for video frame rate optical switching over multiple pixels that can be electrically *** of the advantages of the proposed tuning method compared with other methods are the possibility to apply it for modulation in the visible and near-infrared region,large modulation depth,working at transmission regime,exhibiting low optical loss,low input voltage requirement,and operating with higher than video-rate switching *** device is furthermore compatible with modern electronic display technologies and could be ideal for personal electronic devices such as flat displays,virtual reality holography and light detection and ranging,where fast,solid-state and transparent optical switches are required.

关键词： tuning flash state

Recent Advances in Printed Thin-Film Batteries

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Engineering 2022年第6期8卷 238-261页

作者： Benoit Clement Miaoqiang Lyu Eeshan Sandeep Kulkarni Tongen Lin Yuxiang Hu Vera Lockett Chris Greig Lianzhou Wang Nanomaterials centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD 4072Australia Printed Energy Pty.Ltd. BrisbaneQLD 4001Australia Printed Energy Pty.Ltd. TempeAZ 85284USA Dow centre for Sustainable Engineering Innovation School of Chemical EngineeringThe University of QueenslandBrisbaneQLD 4072Australia

The rapidly increasing demand for wearable electronic devices has motivated research in low-cost and flexible printed batteries with diverse form factors and *** the past,technological achieve-ments in the field have been emphasized,overlooking the industrial and market ***,different applications require different battery chemistries and formats,that greatly impacts the manu-facturing process and competition *** chemistries and formats should therefore be selected carefully to maximize the chances for commercial *** some of these technologies are starting to be marketed for portable electronics,there is a pressing need to evaluate different printing technologies and compare them in terms of the processing constraints and product requirements of specific electronic *** evaluating the intrinsic strengths and current limitations of printed battery technologies,development pathways can be prioritized,and potential bottlenecks can be overcome to accelerate the path to market.

关键词： Printed battery Electronic device Flexible battery Roll-to-roll printing Monolithic integration

Topology-empowered membrane devices for terahertz photonics

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Advanced photonics 2022年第4期4卷 29-37页

作者： Quanlong Yang Dongyang Wang Sergey Kruk Mingkai Liu Ivan Kravchenko Jiaguang Han Yuri Kivshar Ilya Shadrivov australian National University Nonlinear Physics CentreResearch School of PhysicsCanberra ActonAustralia Central South University School of Physics and ElectronicsChangshaChina The Hong Kong University of Science and Technology Department of PhysicsHong KongChina Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTennesseeUnited States Tianjin University Center for Terahertz Waves and College of Precision Instrument and Optoelectronics EngineeringTianjinChina

Control of terahertz waves offers a profound platform for next-generation sensing,imaging,and information ***,all conventional terahertz components and systems suffer from bulky design,sensitivity to imperfections,and transmission *** propose and experimentally demonstrate onchip integration and miniaturization of topological devices,which may address many existing drawbacks of the terahertz *** design and fabricate topological devices based on valley-Hall photonic structures that can be employed for various integrated components of on-chip terahertz *** demonstrate valleylocked asymmetric energy flow and mode conversion with topological waveguide,multiport couplers,wave division,and whispering gallery mode *** devices are based on topological membrane metasurfaces,which are of great importance for developing on-chip photonics and bring many features into terahertz technology.

关键词： topological devices terahertz photonics membrane on-chip

Optical storage arrays: a perspective for future big data storage

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Light(Science & Applications) 2014年第1期3卷 200-210页

作者： Min Gu Xiangping Li Yaoyu Cao centre for Micro-photonics Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia

The advance of nanophotonics has provided a variety of avenues for light–matter interaction at the nanometer scale through the enriched mechanisms for physical and chemical reactions induced by nanometer-confined optical probes in nanocomposite *** emerging nanophotonic devices and materials have enabled researchers to develop disruptive methods of tremendously increasing the storage capacity of current optical *** this paper,we present a review of the recent advancements in nanophotonics-enabled optical storage ***,we offer our perspective of using them as optical storage arrays for next-generation exabyte data centers.

关键词： big data centers optical data storage optical storage arrays super-resolution

Perovskite-based low-cost and high-efficiency hybrid halide solar cells

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photonics research 2014年第5期2卷 111-120页

作者： Jiandong Fan Baohua Jia Min Gu centre for Micro-photonics Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVictoria 3122Australia

A cost-effective and high-throughput material named perovskite has proven to be capable of converting 15.9%of the solar energy to electricity,compared to an efficiency of 3.8%that was obtained only four years *** has already outperformed most of the thin-film solar cell technologies that researchers have been studying for ***,the architecture of perovskite solar cells has been simplified from the traditional dye-sensitized solar cells to planar-heterojunction solar ***,the performance of perovskite in solar cells has attracted intensive attention and ***,many transformative steps will be put forward over the coming few *** this review,we summarize the recent exciting development in perovskite solar cells,and discuss the fundamental mechanisms of perovskite materials in solar cells and their structural *** addition,future directions and prospects are proposed toward high-efficiency perovskite solar cells for practical applications.

关键词： perovskite halide simplified

Diffraction-Limited Imaging with a Graphene Metalens

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Chinese Physics Letters 2020年第10期37卷 54-60页

作者：李雪岩林瀚赵跃进贾宝华 Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China centre for Translational Atomaterials Swinburne University of Technology.P.O.Box 218HawthornVIC 3122Australia The australian research Council(ARC)Industrial Transformation Training centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia

Planar graphene metalens has demonstrated advantages of ultrathin thickness(200 nm),high focusing resolution(343 nm)and efficiency(>32%)and robust mechanical strength and ***,diffraction-limited imaging with such a graphene metalens has not been realized,which holds the key to designing practical integrated imaging *** this work,the imaging rule for graphene metalenses is first derived and theoretically verified by using the Rayleigh-Sommerfeld diffraction theory to simulate the imaging performance of the 200 nm ultrathin graphene *** imaging rule is applicable to graphene metalenses in different immersion media,including water or *** on the theoretical prediction,high-resolution imaging using the graphene metalens with diffraction-limited resolution(500 nm)is demonstrated for the first *** work opens the possibility for graphene metalenses to be applied in particle tracking,microfluidic chips and biomedical devices.

关键词： resolution holds rule