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Optical polarization response at gold nanosheet edges probed by scanning near-field optical microscopy
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作者 Zhuan-Fang Bi Mu Yang Guang-Yi Shang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第8期554-558,共5页
Optical properties of metallic edge-like structures known as knife-edges are a topic of interest and possess potential applications in enhanced Raman scattering, optical trapping, etc. In this work, we investigate the... Optical properties of metallic edge-like structures known as knife-edges are a topic of interest and possess potential applications in enhanced Raman scattering, optical trapping, etc. In this work, we investigate the near-field optical polar- ization response at the edge of a triangular gold nanosheet, which is synthesized by a wet chemical method. A homemade scanning near-field optical microscope (SNOM) in collection mode is adopted, which is able to accurately locate its probe at the edge during experiments. An uncoated straight fiber probe is used in the SNOM, because it s611 preserves the prop- erty of light polarization though it has the depolarization to some extent. By comparing near-field intensities at the edge and glass substrate, detected in different polarization directions of incident light, the edge-induced depolarization is found, which is supported by the finite differential time domain (FDTD) simulated results. The depolarized phenomenon in the near-field is similar to that in the far-field. 展开更多
关键词 NANOSHEET scanning near-field optical microscopy edge effect depotarization
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Influence of the probe-sample interaction on scanning near-field optical microscopic images in the far field
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作者 李智 张家森 +1 位作者 杨景 龚旗煌 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第11期2558-2563,共6页
We have studied the influence of probe-sample interaction in a scanning near-field optical microscopy (SNOM) in the far field by using samples with a step structure. For a sample with a step height of - λ/4, the SN... We have studied the influence of probe-sample interaction in a scanning near-field optical microscopy (SNOM) in the far field by using samples with a step structure. For a sample with a step height of - λ/4, the SNOM image contrast between the two sides of the step changes periodically at different scan heights. For a step height of-λ/2, the image contrast remains approximately the same. The probe-sample interaction determines the SNOM image contrast here. The influence of different refractive indices of the sample has been also analysed by using a simple theoretical model. 展开更多
关键词 SNOM probe-sample interaction near-field scanning optical microscopy
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Standing-wave spectrometry in silicon nano-waveguides using reflection-based near-field scanning optical microscopy
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作者 Yi-Zhi Sun Wei Ding +5 位作者 Bin-Bin Wang Rafael Salas-Montiel Sylvain Blaize Renaud Bachelot Zhong-Wei Fan Li-Shuang Feng 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第1期306-312,共7页
Utilizing reflection-based near-field scanning optical microscopy(NSOM) to image and analyze standing-wave patterns, we present a characterization technique potentially suitable for complex photonic integrated circuit... Utilizing reflection-based near-field scanning optical microscopy(NSOM) to image and analyze standing-wave patterns, we present a characterization technique potentially suitable for complex photonic integrated circuits. By raster scanning along the axis of a straight nano-waveguide in tapping mode and sweeping wavelength, detailed information of propagating waves in that waveguide has been extracted from analyses in both space and wavelength domains. Our technique needs no special steps for phase stabilization, thus allowing long-duration and environment-insensitive measurements. As a proof-of-concept test, in a silicon single-mode waveguide with a few of etched holes, the locations and reflection strengths of the inner defects have been quantified. The measurement uncertainty of the reflection amplitude is less than 25% at current stage. Our technique paves the way for non-destructively diagnosing photonic circuits on a chip with sub-wavelength spatial resolution and detailed information extraction. 展开更多
关键词 near-field scanning optical MICROSCOPES integrated optics interferometry
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A novel phase-sensitive scanning near-field optical microscope 被引量:2
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作者 武晓宇 孙琳 +1 位作者 谭峭峰 王佳 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第5期346-351,共6页
Phase is one of the most important parameters of electromagnetic waves. It is the phase distribution that determines the propagation, reflection, refraction, focusing, divergence, and coupling features of light, and f... Phase is one of the most important parameters of electromagnetic waves. It is the phase distribution that determines the propagation, reflection, refraction, focusing, divergence, and coupling features of light, and further affects the intensity distribution. In recent years, the designs of surface plasmon polariton (SPP) devices have mostly been based on the phase modulation and manipulation. Here we demonstrate a phase sensitive multi-parameter heterodyne scanning near-field opti- cal microscope (SNOM) with an aperture probe in the visible range, with which the near field optical phase and amplitude distributions can be simultaneously obtained. A novel architecture combining a spatial optical path and a fiber optical path is employed for stability and flexibility. Two kinds of typical nano-photonic devices are tested with the system. With the phase-sensitive SNOM, the phase and amplitude distributions of any nano-optical field and localized field generated with any SPP nano-structures and irregular phase modulation surfaces can be investigated. The phase distribution and the interference pattern will help us to gain a better understanding of how light interacts with SPP structures and how SPP waves generate, localize, convert, and propagate on an SPP surface. This will be a significant guidance on SPP nano-structure design and optimization. 展开更多
关键词 phase detection scanning near-field optical microscope (SNOM) heterodyne interferometry surface plasmon polariton (SPP) devices
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Multi-mode Scanning Near-field Optical Microscope
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作者 WANG Jia, LIU Xiu-mei (State Key Lab. of Precision Measurement Technology and Instruments, Dept. of Precision Instruments, Tsinghua University, Beijing 100084, CHN) 《Semiconductor Photonics and Technology》 CAS 2002年第2期116-120,共5页
A scanning near-field optical microscope using uncoated fiber tipis described, which can work in transmission and reflectionconfigurations, both capable of working in illumination andcollection-mode, so that either tr... A scanning near-field optical microscope using uncoated fiber tipis described, which can work in transmission and reflectionconfigurations, both capable of working in illumination andcollection-mode, so that either transparent of opaque sample can beinvestigated. Depending on different applications, eitherconstant-gap or constant-height images can be achieved. A compacthomemade translator permits to elect interested area of sample in therange of 4 mm×4 mm. 展开更多
关键词 near-field optical scanning microscope optical resolution
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Tip-Nanoparticle Near-Field Coupling in Scanning Near-Field Microscopy by Coupled Dipole Method
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作者 Yi Ruan Kan Li +1 位作者 Qiang Lin Ting Zhang 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第4期42-45,共4页
We use the couple dipole method to investigate the scanning near-field optical microscopy metallic tip-nanoparticle near-field interaction. Dependences of the local field intensity inside the nanoparticle on the nanos... We use the couple dipole method to investigate the scanning near-field optical microscopy metallic tip-nanoparticle near-field interaction. Dependences of the local field intensity inside the nanoparticle on the nanosized tip shape,the tip open angle and the illumination angle are revealed. In combination with the previous results, we establish a complete model to understand the tip-nanoparticle near-field coupling mechanism. 展开更多
关键词 Tip-Nanoparticle near-field Coupling in scanning near-field microscopy by Coupled Dipole Method
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Scanning Head for the Apertureless near Field Optical Microscope
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作者 D. V. Kazantsev H. Ryssel 《Modern Instrumentation》 2013年第2期33-40,共8页
The design and characterization of a tip control unit for an apertureless scanning near field optical microscope (ASNOM) is reported. To make the instrument operation easier, the cantilever control parts (piezo excita... The design and characterization of a tip control unit for an apertureless scanning near field optical microscope (ASNOM) is reported. To make the instrument operation easier, the cantilever control parts (piezo excitation of the cantilever vibration for the dynamic mode feedback and the parts necessary for the optical lever scheme of the vibration control) were placed in a separate detachable assembly. To suppress the influence of vibrations of the setup, the assembly was made lightweight. Good optical access to the ASNOM tip from various directions is provided in the system. High long-term mechanical stability of the system (~50 nm lateral drift in 18 hours) as well as low sensitivity to seismic vibrations (~400 pm RMS) is demonstrated. It is shown that external sound is not a main source of noise in the topography image (~200 pm RMS). The light field distribution (with its amplitude and phase) around the ASNOM tip was acquired by scanning the focal spot around the tip, and a high optical quality of the system is demonstrated. 展开更多
关键词 near-field opticS Apertureless SNOM scanning HEAD
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One-pot synthesis and optical properties of In- and Sn-doped ZnO nanoparticles 被引量:1
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作者 Li-ping Wang Fu Zhang +1 位作者 Shuai Chen Zi-heng Bai 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第4期455-461,共7页
Colloidal indium-doped zinc oxide (IZO) and tin-doped zinc oxide (ZTO) nanoparticles were successfully prepared in organic solution, with metal acetylacetonate as the precursor and oleylamine as the solvent. The cryst... Colloidal indium-doped zinc oxide (IZO) and tin-doped zinc oxide (ZTO) nanoparticles were successfully prepared in organic solution, with metal acetylacetonate as the precursor and oleylamine as the solvent. The crystal and optical properties were characterized by X-ray diffraction, UV−visible spectrophotometry, and fluorescence spectroscopy, respectively; the surface and structure morphologies were observed by scanning electron microscopy and transmission electron microscopy. The XRD patterns of the IZO and ZTO nanoparticles all exhibited similar diffraction peaks consistent with the standard XRD pattern of ZnO, although the diffraction peaks of the IZO and ZTO nanoparticles were slightly shifted with increasing dopant concentration. With increasing dopant concentration, the fluorescent emission peaks of the IZO nanoparticles exhibited an obvious red shift because of the difference in atomic radii of indium and zinc, whereas those of the ZTO nanoparticles exhibited almost no shift because of the similarity in atomic radii of tin and zinc. Furthermore, the sizes of the IZO and ZTO nanoparticles distributed in the ranges 20–40 and 20–25 nm, respectively, which is attributed to the difference in ionic radii of indium and tin. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg. 展开更多
关键词 Crystal structure Doping (additives) Electron microscopy Fluorescence Fluorescence spectroscopy High resolution transmission electron microscopy INDIUM Metal nanoparticles Nanoparticles optical properties scanning electron microscopy Semiconductor doping Tin Tin oxides Transmission electron microscopy X ray diffraction Zinc Zinc oxide
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Optical Constants and Structure of ZnO Films by Radio Frequency Magnetron Sputtering 被引量:1
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作者 HUANG Bo LI Jing +2 位作者 WU Yue-bo GUO Dong-hui WU Sun-tao 《Semiconductor Photonics and Technology》 CAS 2007年第2期93-96,共4页
ZnO films are deposited on glass slides by radio frequency(RF) magnetron sputtering under different powers. The polycrystal structures and surface morphologies of the film are investigated. The optical transmission sp... ZnO films are deposited on glass slides by radio frequency(RF) magnetron sputtering under different powers. The polycrystal structures and surface morphologies of the film are investigated. The optical transmission spectra for the ZnO films are measured within the range from 300 nm to 800 nm. The optical constants and thickness of the films are determined using a nonlinear programming method suggested by Birgin et al. The band gap of the film increases with reducing the nano-size of the film grains. The packing density of the films can be improved by reducing the RF power. 展开更多
关键词 ZNO thin films scanning electron microscopy optical materials nonlinear programming
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Clustering study in Eu(DBM)_3Phen-doped polymer optical fibers by optical properties and near-field scanning microscopy
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作者 郑志强 明海 +1 位作者 孙晓红 谢建平 《Chinese Optics Letters》 SCIE EI CAS CSCD 2005年第10期605-607,共3页
The clusters of Eu^3+ ion in Eu(DBM)3Phen-doped polymethyl methacrylate (PMMA) have been studied by three means. The relative fluorescence intensity ratio of the ^5D0 → ^7F2 to ^5D0 → ^7F1 transitions with diff... The clusters of Eu^3+ ion in Eu(DBM)3Phen-doped polymethyl methacrylate (PMMA) have been studied by three means. The relative fluorescence intensity ratio of the ^5D0 → ^7F2 to ^5D0 → ^7F1 transitions with different concentrations of Eu^3+ in Eu(DBM)3Phen-doped PMMA and metastable-state (^5D0) lifetime dependence on Eu^3+ concentration axe analyzed. The analysis indicates that there axe no clustering effects in Eu^3+ ions of Eu(DBM)3Phen-doped PMMA when the Eu^3+ doping concentration is up to 1.0 wt.-%. At the same time, the clustering effect has not been observed by the scanning neax-field optical microscopy (SNOM) in Eu(DBM)3Phen-doped PMMA with 1.0 wt.-% of Eu^3+ ions. The analysis reveals that a high concentration of Eu^3+ can be incorporated into polymer optical fiber (POF) without clustering effect. 展开更多
关键词 Concentration (process) Doping (additives) Fluorescence Near field scanning optical microscopy optical properties POLYMERS Polymethyl methacrylates
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Effect of Co Doping on Structural and Optical Properties of Zinc Oxide Nanoparticles Synthesized by Sol-Gel Method
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作者 Aravapalli Vanaja Karumuri Srinivisa Rao 《Advances in Nanoparticles》 2016年第1期83-89,共7页
In the present work Pure and Cobalt (Co) doped Zinc Oxide (ZnO) Nanoparticles were synthesized by Sol-gel method. The effect of Co doping on structural and optical properties of Nanoparticles were investigated using X... In the present work Pure and Cobalt (Co) doped Zinc Oxide (ZnO) Nanoparticles were synthesized by Sol-gel method. The effect of Co doping on structural and optical properties of Nanoparticles were investigated using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopic characterization techniques. The XRD spectrum revealed the formation of Wurtzite structure of ZnO. The structural properties of nanoparticles including particle size and lattice strain were calculated from XRD data. SEM shows the morphology of Nanoparticles. The presence of functional groups was analyzed from FTIR spectra. The properties of Cobalt doped zinc oxide nanoparticles prepared through simple cost effective, Sol-gel method can be used in optoelectronics and thermally stable devices. 展开更多
关键词 NANOPARTICLES Structural Properties optical Properties X-Ray Diffraction scanning Electron microscopy ZnO
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探测激子极化激元在超薄范德华微晶中的光传播
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作者 Talha Ijaz 边琦 +10 位作者 曹琰 丁皓璇 陈晓瑞 卢欢 杨树 邢雪婷 方思敏 刘孟源 张鑫 高健智 潘明虎 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2024年第1期35-42,I0001-I0004,I0117,共13页
激子极化激元是一种准粒子,过渡金属二硫族化合物材料即使在室温下也能支持传播激子极化子,是非常好的纳米光子学研究平台.已有研究表明,通过散射型扫描近场光学显微镜可以对过渡金属二硫族化合物薄片中激子极化激元进行实空间探测,但... 激子极化激元是一种准粒子,过渡金属二硫族化合物材料即使在室温下也能支持传播激子极化子,是非常好的纳米光子学研究平台.已有研究表明,通过散射型扫描近场光学显微镜可以对过渡金属二硫族化合物薄片中激子极化激元进行实空间探测,但波导厚度仅限于低至30 nm.本文采用三种不同波长的入射光(1550和1064 nm的近红外以及633 nm的可见光),通过基于原子力显微镜的散射型扫描近场光学显微镜测量,探测到MoS2和WSe2薄片中激子极化子普通横电模式的纳米光学成像.在厚度分别低至~3 nm(相当于4原子层)和~8 nm(相当于12原子层)的超薄MoS2和WSe2薄片上,可以清楚地观察到干涉条纹图案,大大打破了之前的测量厚度限制.当厚度接近几个原子层时,波矢量始终保持在1.6k0~1.7k0左右,而不是理论预言的1k0.这些模式的特性表明,体系是由近乎悬浮的过渡金属二硫族化合物薄片的三层对称波导构成,其对激子极性子的传播产生限域效应.研究结果为探索基于超薄过渡金属二硫族化合物材料的近红外区极化器件提供了深入的理解和开辟了新的途径. 展开更多
关键词 二维过渡金属二硫族化合物材料 散射型扫描近场光学显微镜 激子极化子
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Latest advances in soft X-ray spectromicroscopy at SSRF 被引量:5
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作者 张立娟 许子健 +10 位作者 张祥志 于怀娜 邹鹰 郭智 甄香君 曹杰峰 孟祥雨 李俊琴 陈振华 王勇 邰仁忠 《Nuclear Science and Techniques》 SCIE CAS CSCD 2015年第4期1-11,共11页
The BL08U1 A beamline is established as a sophisticated platform at Shanghai Synchrotron Radiation Facility(SSRF), taking advantage of its high spatial resolution(< 30 nm) and high energy resolving power(>10 000... The BL08U1 A beamline is established as a sophisticated platform at Shanghai Synchrotron Radiation Facility(SSRF), taking advantage of its high spatial resolution(< 30 nm) and high energy resolving power(>10 000),for studying properties of solid, liquid, gas, film and other forms of materials at sub-micron scale. In this paper,we present a review on newly implemented techniques, such as total electron yield(TEY), dual energy contrast imaging, nano-CT, soft X-ray excited optical luminance(SXEOL), and coherent diffraction imaging(CDI)under development. Several research cases in nanomaterials, environmental science and biology are presented to demonstrate capabilities of the beamline. 展开更多
关键词 软X射线 上海同步辐射装置 测试 谱学 高能量分辨率 高空间分辨率 纳米材料 衍射成像
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Effect of Melt Scan Rate on Microstructure and Macrostructure for Electron Beam Melting of Ti-6Al-4V 被引量:3
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作者 Karina Puebla Lawrence E. Murr +3 位作者 Sara M. Gaytan Edwin Martinez Francisco Medina Ryan B. Wicker 《Materials Sciences and Applications》 2012年第5期259-264,共6页
Microstructure and variations in porosity in Ti-6Al-4V samples built with electron beam melting (EBM) over a range of melt scan speeds, ranging from 100 mm·s-1 to 1000 mm·s-1 were examined. Microstructure wa... Microstructure and variations in porosity in Ti-6Al-4V samples built with electron beam melting (EBM) over a range of melt scan speeds, ranging from 100 mm·s-1 to 1000 mm·s-1 were examined. Microstructure was characterized by refinement of α-phase and transformation to α′-martensite. Light optical microscopy, scanning electron microscopy, and transmission electron microscopy were used to observe these phenomena, while corresponding tensile testing and associated macro and microindentation hardness measurements were used to define the microstructural variations. Relative stiffness was observed to be linearly log-log related to relative density, corresponding to ideal porosity associated with open-cellular structures. 展开更多
关键词 ELECTRON Beam Melting Additive Manufacturing α-Phase and α′-Martensite optical and ELECTRON microscopy Melt-scan RATE
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Optical waveguide behavior of Se-doped and undoped CdS one-dimensional nanostructures using near-field optical microscopy
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作者 WANG Xiao LIU Dan +3 位作者 PAN Anlian FANG Zheyu HUANG Shan ZHU Xing 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2009年第1期26-30,共5页
The optical waveguide behaviors of CdS and CdSxSe1?x nanostructures are studied using near-field optical microscopy. Optical measurements demonstrate that light may be guided on sub-wavelength scales along CdS nanorib... The optical waveguide behaviors of CdS and CdSxSe1?x nanostructures are studied using near-field optical microscopy. Optical measurements demonstrate that light may be guided on sub-wavelength scales along CdS nanoribbons in straight or bent structures. The photoluminescence (PL) spectra from nanoribbon emission using scanning near-field optical microscopy are analyzed under different incident laser intensities. The PL spectra along Se-doped and undoped CdS nanoribbons at different propagation distances are investigated. Both the guided PL spectra of Se-doped and undoped CdS nanoribbons show red-shifts because of the band-edge absorption. Our results are useful for the development of new kinds of functional nano devices. 展开更多
关键词 near-field optical microscopy ONE-DIMENSIONAL NANOSTRUCTURE PHOTOLUMINESCENCE CDS
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Hematite, Biotite and Cinnabar on the Face of the Turin Shroud: Microscopy and SEM-EDX Analysis
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作者 Gérard Lucotte Thierry Derouin Thierry Thomasset 《Open Journal of Applied Sciences》 2016年第9期601-625,共26页
The Turin Shroud, recently accessible for hands-on scientific research, is now extensively investigated. Its pinkish red blood stains that seem anomalous ones are studied by modern techniques (notably by resolute opti... The Turin Shroud, recently accessible for hands-on scientific research, is now extensively investigated. Its pinkish red blood stains that seem anomalous ones are studied by modern techniques (notably by resolute optical microscopy and scanning electron microscopy coupled with energy dispersive X-ray). Exploration by these techniques of a blood stain located on the face permits us to discover some red-colour particles (hematite, biotite and cinnabar) of exogenous material in this stain. We finally characterize these red-colour particles and try to explain their presences in the blood stain. Globally, all these red-colour particles cannot explain all of the reddish appearance of the area under study. 展开更多
关键词 Turin Shroud Blood Stains Face Area HEMATITE BIOTITE CINNABAR optical microscopy scanning Electron microscopy Energy Dispersive X-Ray
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Development and prospect of near-field optical measurements and characterizations 被引量:2
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作者 Jia WANG Qingyan WANG Mingqian ZHANG 《Frontiers of Optoelectronics》 2012年第2期171-181,共11页
Scanning near-field optical microscopy (SNOM) is an ideal experimental measuring system in nano-optical measurements and characterizations. Besides microscopy with resolution beyond the diffraction limit, spectrosco... Scanning near-field optical microscopy (SNOM) is an ideal experimental measuring system in nano-optical measurements and characterizations. Besides microscopy with resolution beyond the diffraction limit, spectroscope with nanometer resolution and other instruments with novel performances have been indispensable for researches in nano-optics and nanophotonics. This paper reviews the developing history of near-field optical (NFO) measuring method and foresees its prospects in future. The development of NFO measurements has gone through four stages, including optical imaging with super resolution, near-field spectroscopy, measurements ofnanooptical parameters, and detections of near-field interac- tions. For every stage, research objectives, technological properties and application fields are discussed. 展开更多
关键词 scanning near-field optical microscopy(SNOM) near-field optical (NFO) measurement super-resolution imaging near-field spectroscopy nano-optics nanophotonics
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偏硼酸锂熔融-电感耦合等离子体发射光谱法结合扫描电镜-能谱测定锡矿石中锡钨锌铜铁锰 被引量:4
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作者 王冠 董俊 +1 位作者 徐国栋 胡志中 《岩矿测试》 CAS CSCD 北大核心 2023年第1期114-124,共11页
锡石不溶于盐酸、硝酸及王水,测定其中元素含量时通常采用碱熔融分解样品,电感耦合等离子体发射光谱法(ICP-OES)测定。而传统的过氧化钠或其他氧化性熔剂会引入大量的盐类,酸化提取后的溶液需要进一步分离或稀释,这样不仅影响分析的准... 锡石不溶于盐酸、硝酸及王水,测定其中元素含量时通常采用碱熔融分解样品,电感耦合等离子体发射光谱法(ICP-OES)测定。而传统的过氧化钠或其他氧化性熔剂会引入大量的盐类,酸化提取后的溶液需要进一步分离或稀释,这样不仅影响分析的准确度及较低含量元素的测定限,长时间测定还会引起等离子体信号降低,造成仪器损伤。本文将锡矿石经偏硼酸锂熔融,超声波水浴处理,用ICP-OES法同时测定锡、钨、铁、锰、铜、锌元素含量,在标准溶液中匹配等量锂盐,各待测元素之间无明显干扰,操作简单快捷,环境污染小。实验过程中结合扫描电镜-能谱(SEM-EDX)微区分析技术,观察和分析不同熔剂量下样品熔珠的形貌特征和成分差异,发现随着熔剂与样品比例从小至大,熔珠表面结构呈现由松散、易碎向细粒、致密均匀的规律性变化,当熔剂与样品的比例达到7∶1后,熔珠表面形态无明显变化,当熔剂与样品的比例为8∶1时,熔珠表面能明显检测出硼元素的存在,说明此时的熔剂过量,从而实现了应用SEM-EDX技术来确定ICP-OES法分析中熔剂与样品的最佳配比。本研究还探讨了锡矿石样品的熔融温度和时间、介质酸度,对锡矿石标准物质GBW07281进行分析测定,方法精密度(RSD)为1.20%~8.06%,方法检出限为0.0012%~0.0098%,满足了样品中元素定量分析的要求。 展开更多
关键词 锡矿石 金属元素 偏硼酸锂熔融 电感耦合等离子体发射光谱法 扫描电镜-能谱
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储粮品质检测评价方法研究进展 被引量:1
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作者 张书龙 蒋华伟 +4 位作者 郭陶 杨震 赵丽科 周颜 周德祥 《食品科学》 EI CAS CSCD 北大核心 2023年第11期291-300,共10页
品质检测评价是粮食储藏管理工作中的关键环节,一直是研究人员高度关注的热点研究领域,其在保障粮食储藏安全以及加工制品中发挥至关重要的作用。为了今后更好地开展相关工作,本文首先回顾常规基于光学、声学、介电、理化等特性和挥发... 品质检测评价是粮食储藏管理工作中的关键环节,一直是研究人员高度关注的热点研究领域,其在保障粮食储藏安全以及加工制品中发挥至关重要的作用。为了今后更好地开展相关工作,本文首先回顾常规基于光学、声学、介电、理化等特性和挥发性物质的储粮品质检测评价方法的研究进展;然后阐述当前新型检测技术如强磁场、激光诱导击穿光谱、核磁共振波谱以及扫描电子显微镜在储粮品质评价中的应用,并对比分析各种技术方法的优缺点;最后展望储粮品质检测评价方法的未来研究方向。 展开更多
关键词 储粮品质 光学检测 强磁场 激光诱导击穿光谱 核磁共振波谱 扫描电子显微镜
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叠层/转角二维原子晶体结构与极化激元的近场光学表征 被引量:2
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作者 徐琨淇 胡成 +4 位作者 沈沛约 马赛群 周先亮 梁齐 史志文 《物理学报》 SCIE EI CAS CSCD 北大核心 2023年第2期239-255,共17页
极化激元是一种光与物质发生强相互作用形成的准粒子,可以极大地压缩光波长,提供一种突破衍射极限的光调制方式,为纳米光子学、非线性光学、量子光学等相关学科的发展提供了重要支持.范德瓦耳斯二维原子晶体是研究极化激元的理想平台,... 极化激元是一种光与物质发生强相互作用形成的准粒子,可以极大地压缩光波长,提供一种突破衍射极限的光调制方式,为纳米光子学、非线性光学、量子光学等相关学科的发展提供了重要支持.范德瓦耳斯二维原子晶体是研究极化激元的理想平台,通过叠层、转角可以为极化激元的调控提供额外的自由度,从而展示出新颖的光学结构和极化激元特性.本文以近场光学为主要研究方法,对近几年出现的叠层及转角二维原子晶体的各种光学结构及极化激元进行综述.综述内容包括叠层石墨烯的畴结构、转角二维原子晶体的莫尔超晶格结构、转角二维拓扑极化激元、转角石墨烯手性等离激元等.最后,对叠层/转角二维原子晶体及其极化激元的未来发展进行展望. 展开更多
关键词 转角二维原子晶体 极化激元 莫尔超晶格 扫描近场光学显微技术
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