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Universal frequency engineering tool for microcavity nonlinear optics:multiple selective mode splitting of whispering-gallery resonances

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Photonics Research 2020年第11期8卷 1676-1686页

作者： Xiyuan Lu Ashutosh Rao Gregory Moille Daron A.Westly Kartik Srinivasan Microsystems and Nanotechnology Division Physical Measurement LaboratoryNational Institute of Standards and TechnologyGaithersburgM aryland 20899USA Institute for Research in Electronics and Applied Physics and M aryland nanocenter University of MarylandCollege ParkMaryland 20742USA Department of Chemistry and Biochemistry University of MarylandCollege ParkMaryland 20742USA Joint Quantum Institute NIST/University of MarylandCollege ParkMaryland 20742USA

Whispering-gallery microcavities have been used to realize a variety of efficient parametric nonlinear optical processes through the enhanced light–matter interaction brought about by supporting multiple high quality factor and small modal volume *** to such studies is the ability to control the relative frequencies of the cavity modes,so that frequency matching is achieved to satisfy energy *** this is done by tailoring the resonator cross *** so modifies the frequencies of all of the cavity modes,that is,the global dispersion profile,which may be undesired,for example,in introducing competing nonlinear ***,we demonstrate a frequency engineering tool,termed multiple selective mode splitting(MSMS),that is independent of the global dispersion and instead allows targeted and independent control of the frequencies of multiple cavity *** particular,we show controllable frequency shifts up to 0.8 nm,independent control of the splitting of up to five cavity modes with optical quality factors≳10^5,and strongly suppressed frequency shifts for untargeted *** MSMS technique can be broadly applied to a wide variety of nonlinear optical processes across different material platforms and can be used to both selectively enhance processes of interest and suppress competing unwanted processes.

关键词： resonator nonlinear splitting

A facile method for studying interaction of rhodamine B and bovine serum albumin:Towards physical-binding mediated fluorescence labeling of proteins

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Nuclear Science and Techniques 2015年第6期26卷 104-107页

作者：马宇星钟睿博郭俊刘雨双袁鸣白志军刘涛涛赵欣敏张峰 Agricultural nanocenter School of Life Sciences Inner Mongolia Agricultural University

Strategies for labeling proteins with fluorophores are always important for biotechnology. Here we take a model protein(bovine serum albumin) and a typical fluorophore(rhodamine B) to demonstrate a direct labeling method just by physical adsorption. In combination with size exclusion chromatography and the Scartchard equation, we have developed a facile analysis method for calculating the binding constant and binding *** molecular docking method has been used to study the binding site in amino acid level.

关键词：牛血清白蛋白蛋白质标记荧光蛋白罗丹明B 蛋白相互作用介导体育尺寸排阻色谱

Subnanometer localization accuracy in widefield optical microscopy

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Light(Science & Applications) 2018年第1期7卷 740-754页

作者： Craig R.Copeland Jon Geist Craig D.McGray Vladimir A.Aksyuk J.Alexander Liddle B.Robert Ilic Samuel M.Stavis Center for Nanoscale Science and Technology National Institute of Standards and TechnologyGaithersburgMD 20899USA maryland nanocenter University of MarylandCollege ParkMD 20742USA Engineering Physics Division National Institute of Standards and TechnologyGaithersburgMD 20899USA

The common assumption that precision is the limit of accuracy in localization microscopy and the typical absence of comprehensive calibration of optical microscopes lead to a widespread issue—overconfidence in measurement results with nanoscale statistical uncertainties that can be invalid due to microscale systematic *** this article,we report a comprehensive solution to this underappreciated *** develop arrays of subresolution apertures into the first reference materials that enable localization errors approaching the atomic scale across a submillimeter *** present novel methods for calibrating our microscope system using aperture arrays and develop aberration corrections that reach the precision limit of our reference *** correct and register localization data from multiple colors and test different sources of light emission with equal accuracy,indicating the general applicability of our reference materials and calibration *** a first application of our new measurement capability,we introduce the concept of critical-dimension localization microscopy,facilitating tests of nanofabrication processes and quality control of aperture *** a second application,we apply these stable reference materials to answer open questions about the apparent instability of fluorescent nanoparticles that commonly serve as fiducial *** study establishes a foundation for subnanometer localization accuracy in widefield optical microscopy.

关键词： optical limit field

A facile and precise method for quantifying small–large/light-weighted molecular interaction system

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Nuclear Science and Techniques 2016年第5期27卷 132-139页

作者： Wan-Rong Li Pei Gong Yu-Xing Ma Hai-Yang Gao Xiao-Ling Yun Ming Yuan Yu-Shuang Liu Feng Zhang Agricultural nanocenter School of Life SciencesInner Mongolia Agricultural University306 Zhaowuda RoadHohhot 010018China

It is significant to quantify the intermolecular physisorption extent in biomedical *** taking the advantage of a significant difference from either sizes or weights,we introduced a combination of Scatchard equation and either ultracentrifugation or size exclusion chromatography to obtain both the binding constant and the number of binding sites by using bovine serum albumin and eosin B as *** to the photoluminescence quenching-based methods like Stern-Volmer and Hill equations,the introduced method is not only more precise but also simpler and more straightforward for the ***,the protein conformational changes and the corresponding theoretical binding mode with an atomic resolution were also studied by using three-dimensional fluorescence spectroscopy and molecular docking method,*** comparative results could help scientists select right methods to study any interactions between two molecules with significant differences from either sizes or weights.

关键词：相互作用系统分子间定量方法尺寸排阻色谱简便牛血清白蛋白 Hill方程三维荧光光谱

Viruses and Virus-Like Protein Assemblies--Chemically Programmable Nanoscale Building Blocks

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Nano Research 2009年第5期2卷 349-364页

作者： L.Andrew Lee Zhongwei Niu Qian Wang department of chemistry&biochemistry and nanocenter university of south carolina631 sumter streetcolumbiasc 29208usa

Supramolecular proteins are generated using a limited set of twenty amino acids,but have distinctive functionalities which arise from the sequential arrangement of amino acids configured to exquisite three-dimensional ***,virus-like particles,ferritins,enzyme complexes,cellular micro-compartments,and other supramolecular protein assemblies exemplify these systems,with their precise arrangements of tens to hundreds of molecules into highly organized scaffolds for nucleic acid packaging,metal storage,catalysis or sequestering reactions at the nanometer *** versatile protein systems,dubbed as bionanoparticles(BNPs),have attracted materials scientists to seek new opportunities with these pre-fabricated templates in a wide range of nanotechnology-related ***,we focus on some of the key modification strategies that have been utilized,ranging from basic protein conjugation techniques to more novel strategies,to expand the functionalities of these multimeric protein ***,in combination with molecular cloning and sophisticated chemistries,these BNPs are being incorporated into many applications ranging from functional materials to novel biomedical drug designs.

关键词： Bionanoparticles virus bioconjugation nanomaterials bioimaging drug delivery

Low-loss metasurface optics down to the deep ultraviolet region

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Light(Science & Applications) 2020年第1期9卷 1488-1497页

作者： Cheng Zhang Shawn Divitt Qingbin Fan Wenqi Zhu Amit Agrawal Yanqing Lu Ting Xu Henri J.Lezec School of Optical and Electronic Information&Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology430074 WuhanChina Physical Measurement Laboratory National Institute of Standards and Technology20899 GaithersburgMDUSA maryland nanocenter University of MarylandCollege ParkMD 20742USA National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing University210093 NanjingChina

Shrinking conventional optical systems to chip-scale dimensions will benefit custom applications in imaging,displaying,sensing,spectroscopy,and *** this goal,metasurfaces-planar arrays of subwavelength electromagnetic structures that collectively mimic the functionality of thicker conventional optical elements-have been exploited at frequencies ranging from the microwave range up to the visible ***,we demonstrate highperformance metasurface optical components that operate at ultraviolet wavelengths,including wavelengths down to the record-short deep ultraviolet range,and perform representative wavefront shaping functions,namely,highnumerical-aperture lensing,accelerating beam generation,and hologram *** constituent nanostructured elements of the metasurfaces are formed of hafnium oxide-a loss-less,high-refractive-index dielectric material deposited using low-temperature atomic layer deposition and patterned using high-aspect-ratio Damascene *** study opens the way towards low-form factor,multifunctional ultraviolet nanophotonic platforms based on flat optical components,enabling diverse applications including lithography,imaging,spectroscopy,and quantum information processing.

关键词： ultraviolet optics collective

Polymer-virus core-shell structures prepared via co-assembly and template synthesis methods

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Science China Chemistry 2010年第1期53卷 71-77页

作者： SUTHIWANGCHAROEN Nisaraporn PREVELIGE Peter E.Jr Department of Chemistry and Biochemistry and nanocenter University of South CarolinaColumbiaSouth Carolina 29208USA Department of Microbiology University of Alabama at BirminghamBirminghamAL 35294USA

Bionanoparticles(BNPs),consisting of virus and virus-like assemblies,have attracted much attention in the biomedical field for their applications such as imaging and targeted drug delivery,owing to their well-defined structures and well-controlled ***-based core-shell structures provide a unique system for the investigation of biological interactions such as protein-protein and protein-carbohydrate ***,it is still a challenge to prepare the BNPs-based core-shell ***,we describe(i) co-assembly method and(ii) template synthesis method in the development of polymer-BNPs core-shell *** two methods can be divided into three different *** system A,different polymers including poly(2-vinylpyridine)(P2VP),poly(4-vinylpyridine)(P4VP) and poly(ε-caprolactone)-block-poly(2-vinylpyridine)(PCL-b-P2VP) can form a raspberry-like structure with *** system B,polystyrene(PS) spheres end capped with free amine and BNPs can form a core-shell *** System C,layer-by-layer(LBL) method is used to prepare positive charged PS particles,which can be used as a template to form the core-shell structures with *** two methods may open a new way for preparing novel protein-based functional materials for potential applications in the biomedical field.

关键词： core-shell structures bionanoparticles virus polymers co-assembly template synthesis layer-by-layer

Multifunctional metasurfaces enabled by simultaneous and independent control of phase and amplitude for orthogonal polarization states

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Light(Science & Applications) 2021年第6期10卷 1088-1098页

作者： Mingze Liu Wenqi Zhu Pengcheng Huo Lei Feng Maowen Song Cheng Zhang Lu Chen Henri JLezec Yanqing Lu Amit Agrawal Ting Xu National Laboratory of Solid-State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing University210093 NanjingChina Collaborative Innovation Center of Advanced Microstructures 210093 NanjingChina Physical Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD 20877USA maryland nanocenter University of MarylandCollege ParkMD 20877USA School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology430074 WuhanChina

Monochromatic light can be characterized by its three fun dame ntal properties:amplitude,phase,and *** this work,we propose a versatile,transmission-mode all-dielectric metasurface platform that can independently manipulate the phase and amplitude for two orthogonal states of polarization in the visible frequency *** proof-o仁concept experimental demonstration,various single-layer metasurfaces composed of subwavelength-spaced titanium-dioxide nanopillars are designed,fabricated,and characterized to exhibit the ability of polarization-switchable multidimensional light-field manipulation,including polarization-switchable grayscale nanoprinting,nonuniform cylindrical lensing,and complex-amplitude *** envision the metasurface platform dem on strated here to open new possibilities toward creating compact multifunctional optical devices for applications in polarization optics,information encoding,optical data storage,and security.

关键词： phase proof simultaneous

Optimized sintering and mechanical properties of Y-TZP ceramics for dental restorations by adding lithium disilicate glass ceramics

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Journal of Advanced Ceramics 2021年第6期10卷 1326-1337页

作者： Ke LI Jiancun RAO Congqin NING State Key Laboratory of High Performance Ceramics and Superfine Micro structure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China AIM Lab Maryland NanoCenterUniversity of MarylandCollege ParkMD 20742USA The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Normal UniversityShanghai 200234China

The novel dental ceramics can be fabricated at lower temperatures when sol-gel derived lithium disilicate glass ceramics(LDGC)was used as an additive for yttria stabilized tetragonal zirconia polycrystalline(Y-TZP)*** effect of LDGC on the sintering,mechanical,and translucent properties of Y-TZP ceramics was investigated in the present *** results showed that the LDGC additive effectively improved the densification of Y-TZP at 1100℃,which was much lower than the sintering temperature for pure *** sintered at 1100℃,the Y-TZP with 1 wt%LDGC reached a relative density of 95.45%,and prossessed a flexural strength of 482.4 MPa and a fracture toughness of 5.94 ***,its translucency was also ***,the addition of LDGC could result in an escape of yttrium atoms from the grain lattice of zirconia,which induced the tetragonal-monoclinic transformation of zirconia and abnormal growth of monoclinic *** escaped yttrium atoms diffused into the intergranular glass *** results indicated that the novel Y-TZP-LDGC ceramics has a great potential to be used for all-ceramic restorations.

关键词： yttria stabilized tetragonal zirconia polycrystalline(Y-TZP) lithium disilicate glass ceramics(LDGC) sintering mechanical properties dental restoration