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Learning the imaging mechanism directly from optical microscopy observations

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Photonics Research 2024年第1期12卷 7-26页

作者： ZE-HAO WANG LONG-KUN SHAN TONG-TIAN WENG TIAN-LONG CHEN XIANG-DONG CHEN ZHANG-YANG WANG GUANG-CAN GUO FANG-WEN SUN CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China University of Texas at Austin AustinTexas 78705USA Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

The optical microscopy image plays an important role in scientific research through the direct visualization of the nanoworld,where the imaging mechanism is described as the convolution of the point spread function(PSF)and emitters.Based on a priori knowledge of the PSF or equivalent PSF,it is possible to achieve more precise exploration of the nanoworld.However,it is an outstanding challenge to directly extract the PSF from microscopy images.Here,with the help of self-supervised learning,we propose a physics-informed masked autoencoder(PiMAE)that enables a learnable estimation of the PSF and emitters directly from the raw microscopy images.We demonstrate our method in synthetic data and real-world experiments with significant accuracy and noise robustness.PiMAE outperforms DeepSTORM and the Richardson–Lucy algorithm in synthetic data tasks with an average improvement of 19.6%and 50.7%(35 tasks),respectively,as measured by the normalized root mean square error(NRMSE)metric.This is achieved without prior knowledge of the PSF,in contrast to the supervised approach used by DeepSTORM and the known PSF assumption in the Richardson–Lucy algorithm.Our method,PiMAE,provides a feasible scheme for achieving the hidden imaging mechanism in optical microscopy and has the potential to learn hidden mechanisms in many more systems.

关键词： optical emitter mechanism

Publisher’s Erratum to:Metamaterial-based graphene thermal emitter

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Nano Research 2024年第6期17卷 5753-5753页

作者： Cheng Shi Nathan H.Mahlmeister Isaac J.Luxmoore Geoffrey R.Nash College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeterEX44QFUK

The article"Metamaterial-based graphene thermal emitter",written by Cheng Shi,Nathan H.Mahlmeister,IsaacJ.Luxmoore,and Geoffrey R.Nash,was originally published electronically on the publisher’s internet portal(currently SpringerLink)on December 6th 2017 without open access.With the author(s)’decision to opt for Open Choice the copyright of the article changed in February 2018 to©The Author(s)2018 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License(http://***/licenses/by/4.0/),which permits use,duplication,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons license and indicate if changes were made.The original article has been corrected.

关键词： emitter license creative

Thermal analysis and optimization of the emitter in the solar thermophotovoltaic (STPV)

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Science China(Technological Sciences) 2009年第10期52卷 2660-2669页

作者： CHEN Xue XUAN YiMin HAN YuGe School of Power Engineering Nanjing University of Science&TechnologyNanjing 210094China

A model for predicting the performance of the emitter in the solar thermophotovoltaic (STPV) system is presented in this article. The effect of non-parallelism of sun rays on concentration capability is numerically calculated,also the flow field in the emitter cavity and the temperature distribution of the emitter with different inlet conditions are compared. Numerical results show that free convection of the air inside the emitter cavity has great effect on the emitter temperature and may reduce the electricity output of the cells. At last,a new kind of selective film is put forward. Through optimizing the cut-off wavelength of a selective film,radiation loss is further reduced and system efficiency is improved.

关键词： the solar thermophotovoltaic (STPV) emitter free convection selective film

Plasmonic vortex beam emitter

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Photonics Research 2023年第10期11卷 1723-1732页

作者： ZI-WEN ZHANG YU-LU LEI JUAN-FENG ZHU CHAO-HAI DU Center for Carbon-based Electronics School of ElectronicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China Science Mathematicsand Technology(SMT)Singapore University of Technology and DesignSingapore 487372Singapore

Terahertz vortices prompt numerous advanced applications spanning classical and quantum communications,sensing, and chirality-based detection, owing to the inherent physical properties of terahertz waves and orbital angular momentum(OAM). Nonetheless, existing methodologies for generating terahertz vortices face challenges such as unalterable topological charges and intricate feed networks. To address these limitations, we propose a novel approach to generate multi-mode and tunable vortex beams based on chiral plasmons. Through eigenmode analysis, the uniform helical gratings are demonstrated to support chiral plasmons carrying OAM. By leveraging their vortex characteristics and introducing modulation into the periodic system, these chiral plasmons are alternatively diffracted into high-purity vortex radiations according to the Bragg law. To validate the theory, the vortex beam emitter is fabricated and measured in the microwave regime based on the modulated scheme. Experimental results confirm the emission of vortex beams with desirable phase distributions and radiation patterns. Our findings highlight the potential of chiral plasmons as seeds for tunable and compact vortex radiation, offering promising applications in tunable vortex sources.

关键词： emitter tunable vortex

Plasmon-exciton interaction in colloidally fabricated metal nanoparticlequantum emitter nanostructures

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Nano Research 2019年第9期12卷 2164-2171页

作者： Yi Luo Jing Zhao Department of Chemistry University of Connecticut55 North Eagleville RoadStorrs06269USA Institute of Materials Science University of Connecticut97 North Eagleville RoadStorrs06269USA

When quantum emitters and plasmonic nanoparticles are in close vicinity,the energy exchange,termed as plasmon-exciton coupling,can make the absorption and emission behavior of the hybrid structure very different from those of the two constituents alone.The coupling strength between the two constituents highly depends on how the hybrid structure is constructed.As a result,a diverse range of coupling effect arise including plasmon induced fluorescence quenching/enhancing (weak coupling),Fano interference (intermediate coupling),Rabi-splitting and lasing (strong coupling).The emergence of different coupling behavior can be controlled by the different combinations of quantum emitters and plasmonic nanoparticles as well as the spatial arrangement of the individual components.Colloidal assembly/synthesis methods are essentially delicate strategies that can build the hybrid nanostructures with nanometer precision and allow for large-scale processing.In this review,we discuss the theoretical models that apply to different coupling behaviors,the optical properties of the hybrid systems,and the advancement of colloidal methods to manipulate the plasmon-exciton in the hybrid structures.We also provide perspectives on the challenges and future directions of the research in coupled plasmon-exciton nanosystems.

关键词： quantum emitter metal nanoparticles plasm on-exciton coupling colloidal assembly Purcell effect Rabi-splitting

Optimization of Metal Coverage on the emitter in n-Type Interdigitated Back Contact Solar Cells Using a PC2D Simulation

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Chinese Physics Letters 2013年第7期30卷 254-257页

作者：张巍陈晨贾锐 Janssen G.J.M. 张代生邢钊 Bronsveld P.C.P. Weeber A.W. 金智刘新宇 Institute of Microelectronics Chinese Academy of SciencesBeijing 100029 ECN Solar Energy P.O.X1NL-1755 ZGPettenThe Netherlands

In interdigitated back contact(IBC)solar cells,the metal-electrode coverage on a p-type emitter is optimized by a PC2D simulation.The result shows that the variation of the metal coverage ratio(MCR)will affect both the surface passivation and the electrode-contact properties for the p-type emitter in IBC solar cells.We find that when R_(c) ranges from 0.08 to 0.16Ω·cm^(2),the MCR is optimized with a value of 25%and 33%,resulting in a highest energy-conversion efficiency.The dependences of both Voc and fill factor on MCR are simulated in order to explore the mechanism of the IBC solar cells.

关键词： emitter digit electrode

Photoluminescence Investigation of Charge Build-Up Process in the emitter of a Double-Barrier Resonant Tunneling Structure

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Chinese Physics Letters 1996年第9期13卷 707-710页

作者： LUO Ke-jian ZHENG Hou-zhi ZHANG Ting LI Cheng-fang YANG Xiao-ping ZHANG Peng-hua ZHANG Wei TIAN Jin-fa National Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083

Charge build-up process in the emitter of a double-barrier resonant tunneling structure is studied by using photoluminescence spectroscopy.Clear evidence is obtained that the charge accumulation in the emitter keeps almost constant with bias voltages in the resonant regime,while it increases remarkably with bias voltages beyond resonant regime.The optical results are in good agreement with the electrical measurement.It is demonstrated that the band gap renormalization plays a certain role in the experiment.

关键词： measurement emitter resonant

Sharpening emitter localization in front of a tuned mirror

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Light(Science & Applications) 2018年第1期7卷 71-78页

作者： Hannah S.Heil Benjamin Schreiber Ralph Götz Monika Emmerling Marie-Christine Dabauvalle Georg Krohne Sven Höfling Martin Kamp Markus Sauer Katrin G.Heinze Rudolf Virchow Center Research Center for Experimental BiomedicineUniversity of WürzburgJosef-Schneider-Str.297080 WürzburgGermany Department of Biotechnology and Biophysics BiozentrumUniversity of WürzburgAm Hubland97074 WürzburgGermany Technische Physik Physikalisches Institut and Wilhelm Conrad Röntgen-Center for Complex Material SystemsUniversity of WürzburgAm Hubland97074 WürzburgGermany Division of Electron Microscopy BiozentrumUniversity of WürzburgAm Hubland97074 WürzburgGermany SUPA School of Physics and AstronomyUniversity of St AndrewsSt Andrews KY169SSUK

Single-molecule localization microscopy(SMLM)aims for maximized precision and a high signal-to-noise ratio1.Both features can be provided by placing the emitter in front of a metal-dielectric nanocoating that acts as a tuned mirror2–4.Here,we demonstrate that a higher photon yield at a lower background on biocompatible metal-dielectric nanocoatings substantially improves SMLM performance and increases the localization precision by up to a factor of two.The resolution improvement relies solely on easy-to-fabricate nanocoatings on standard glass coverslips and is spectrally and spatially tunable by the layer design and wavelength,as experimentally demonstrated for dual-color SMLM in cells.

关键词： emitter mirror tunable

Double co-host emitter based top emitting white organic light emitting diodes with enhanced brightness and efficiency

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Optoelectronics Letters 2021年第10期17卷 581-585页

作者： Neha Jain Sujata Pandey Rajiv Kr.Singh O.P.Sinha Department of ECE Amity School of Engineering and TechnologyAmity UniversityUPNoidaIndia Department ofEEE Galgotia College of Engineering and TechnologyGreater NoidaIndia CSIR-National Physical Laboratory New DelhiIndia Amity Institute of Nanotechnology Amity University UPNoidaIndia

Novel and simplified bi-layer top-emitting white organic light emitting diodes(OLEDs)with dual co-host emitters have been simulated and analyzed.They consist of yellow-green emitting layer(EML)as electron transport layer(ETL)and blue EML as hole transport layer(HTL).Novelty of the device lies in simplification of tri-layer white OLED to a bi-layered device which is done by merging yellow-green EML with ETL and blue EML with HTL.The simulated devices show Commission Internationale de L’Eclairage(CIE)colour coordinates well within the emission range of white light.The results show that device A with 5,6,11,12-tetraphenylnaphthacene(rubrene)doped ETL has achieved the lowest luminance but longest excited state lifetime.Device D with tris-(8-hydroxyquinoline)aluminum:4-(dicyanomethylene)-2-t-butyle-6-(1,1,7,7-tetra-methyljulolidyl-9-enyl)4 H-pyran(Alq3:DCJTB)as ETL which emits yellow light and 2,7-bis[N,N-bis(4-methoxy-phenyl)amino]-9,9-spirobifluorene(MS-TPD):bis(2-methyl-8-quninolinato)-4-phenylphenolate alu-minium(BAlq)as HTL which is responsible for blue light emission is found to have best characteristics when compared to other simulated devices.It has a maximum luminance of 10000 cd/m2 and current efficiency of 15.25 cd/A,respectively,and CIE coordinates are at(0.329,0.319).The device is found to be compatible to be used in solid state lighting applications because of the low driving voltage of the device.

关键词： emitter diodes white