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Journal of Innovative Optical Health Sciences 2010年第3期3卷 213-219页

作者： GUANGXIA HU ZHIYU QIAN TIANMING YANG WEITAO LI JIERU XIE Department of Biomedical Engineering Nanjing University of Aeronautics and Astronautics 29 Yudao Street Nanjing 210016China Zhongda Hospital Southeast University 87 Dingjiaqiao RoadNanjing 210009China

Near-infrared spectroscopy(NIRS)technology and mie theory are utilized for fundamental research on radiofrequency ablation of biological tissue.Firstly,NIRS is utilized to monitor rats undergoing radiofrequency ablation surgery in real time so as to explore the relationship between reduced scattering coefficient(μ_(s)')and the degree of thermally induced tissue coagulation.Then,mie theory is utilized to analyze the morphological structure change of biological tissue so as to explore the basic mechanism of the change of optical parameters caused by thermally induced tissue coagulation.Results show that there is a close relationship between μ_(s)' and the degree of thermally induced tissue coagulation;the degree of thermal coagulation can be obtained by the value of μ_(s)';when biological tissue thermally coagulates,the average equivalent scattering particle decreases,the particle density increases,and the anisotropy factor decreases.

关键词： Near-infrared spectroscopy(NIRS) mie theory radiofrequency ablation reducing scattering coefficient(μ_(s)') the average equivalent scattering particle radius

Multiple scattering and modeling of laser in fog

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Chinese Physics B 2021年第6期30卷 311-319页

作者：薛积禹曹运华吴振森陈杰李艳辉张耿杨凯高若婷 School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China School of Environment and Safety Engineering North University of ChinaTaiyuan 030000China

When a laser is transmitted in fog, and the water droplets will scatter and absorb the laser, which affects the intensity of the laser transmission and the accuracy of radar detection. Therefore, it is of great significance to study the laser transmission in the fog. At present, the main method of calculating the scattering and attenuation characteristics of fog is based on the radiation transmission theory, which is realized by a large number of numerical calculations or physical simulation methods, which takes time and cannot meet the requirements for obtaining the fast and accurate results. Therefore, in this paper established are a new laser forward attenuation model and backward attenuation model in low visibility fog. It is found that in low visibility environments, the results calculated by the Monte Carlo method are more accurate than those from most of the existing forward attenuation models. For the cases of 0.86-μm, 1.06-μm, 1.315-μm, 10.6-μm typical lasers incident on different fogs with different visibilities, a backscatter model is established, the error between the fitting result and the calculation result is analyzed, the backward attenuation fitting parameters of the new model are tested, and a more accurate fitting result is obtained.

关键词： mie theory Monte Carlo method engineering model multiple scattering error analysis

Surface lattice resonances in dielectric metasurfaces for enhanced light-matter interaction [Invited]

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Chinese Optics Letters 2021年第6期19卷 66-71页

作者：贾曰辰任莹莹赵兴娟陈峰 School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250014China

Lithium niobate(LiNbO_(3)) is a versatile crystalline material for various photonic applications. With the recent advances in LiNbO_(3)-on-insulator(LNOI) thin film technology, LiNbO_(3) has been regarded as one of the most promising platforms for multifunctional integrated photonics. In this work, we present the field enhancement due to collective resonances in arrayed LiNbO_(3) nanoantennas. These resonances arise from the enhanced radiative coupling of localized mie resonances in the individual nanoparticles and Rayleigh anomalies due to in-plane diffraction orders of the lattice. We describe the pronounced differences in field enhancement and field distributions for electric and magnetic dipoles, offering valuable information for the design and optimization of high-quality-factor optical metasurfaces based on LiNbO_(3).

关键词： integrated optics nanophotonics lithium niobate mie theory

Super scattering phenomenon in active spherical nanoparticles

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Chinese Physics B 2017年第6期26卷 430-436页

作者：刘昌宇解亚明王治国 School of Physics Science and Engineering Tongji University Shanghai 200092 China Beijing Computational Science Research Center Beijing 100193 China Department of Physics University of Science and Technology of China Hefei 230026 China

Localized surface electromagnetic resonances in spherical nanoparticles with gain are investigated by using the mie theory. Due to the coupling between the gain and resonances, super scattering phenomenon is raised and the total scattering efficiency is increased by over six orders of magnitude. The dual frequency resonance induced by the electric dipole term of the particle is observed. The distributions of electromagnetic field and the Poynting vector around nanoparticles are provided for better understanding different multipole resonances. Finally, the scattering properties of active spherical nanoparticles are investigated when the sizes of nanoparticles are beyond the quasi-static limit. It is noticed that more highorder multipole resonances can be excited with the increase of the radius. Besides, all resonances dominated by multipole magnetic terms can only appear in dielectric materials.

关键词： super scattering gain plasmonic resonance mie theory

Numerical calculation of multiple scattering with the layer model

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Particuology 2009年第1期7卷 76-82页

作者： Yuehuan Wei Jianqi Shen Haitao Yu University of Shanghai for Science and Technology Shanghai 200093 China

The optical measurement technique based on mie scattering has been applied to various areas, in which single scattering at low particle concentration is assumed. Nevertheless, since multiple scattering is usually unavoidable in online measurements, we present in this work a multiple scattering calculation method, in which a layer model is employed. The three-dimensional particle system is divided into a pile of layers the number of which is automatically determined, depending on the obscuration of the particle system. The calculation is found to be fast, reasonable and reliable.

关键词： Multiple scattering Layer model mie theory Forward scattering Particle analysis

Multipole resonance in the interaction of a spherical Ag nanoparticle with an emitting dipole

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Chinese Physics B 2014年第8期23卷 357-361页

作者： Liu Jia-Dong Song Feng Zhang Jun Liu Shu-Jing Wang Feng-Xiao Wang Li-Chao TEDA Applied Physics School Nankai University Tianjin 300457 China School of Physics Nankai University Tianjin 300071 China School of Biomedical Engineering Tianjin Medical University Tianjin 300070 China

The effect of multipole resonance in the interaction between a spherical metallic nanoparticle （MNP） and an emitting dipole is studied with the mie theory. The results show that the absorption peak of the MNP with respect to the field of the emitting dipole is blue-shifted with the decrease of the spacing between MNP and emitting dipole due to the enhanced multipole resonance. At a short distance, the enhanced multipole terms of scattering are not obvious compared with the dipole term. For the decay rate of the emitting dipole, multipole resonance brings about the enhancement of it largely at short spacing. For the radiative decay rate, the behavior is quite different. The dipole term is dominant at a short spacing, and the multipole term is dominant at a larger spacing.

关键词： mie theory multipole resonance absorption decay rate

Enhanced optical absorption in semiconductor nano- particles enabled by nearfield dielectric scattering

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Nano Research 2017年第4期10卷 1292-1301页

作者： Kowsalya D. Rasamani Jonathan J. Foley IV Brittney Beidelman Yugang Sun Department of Chemistry Temple University 1901 North 13th Street Philadelphia Pennsylvania 19122 USA Department of Chemistry William Paterson University 300 Pompton Road Wayne New Jersey 07470 USA Department of Physics Bryn Mawr College 101 North Merion Avenue Bryn Mawr Pennsylvania 19010 USA

The optical absorption of semiconducting AgBr nanocubes is significantly increased by up to 5 times in the measured spectral range when they are bonded to the surface of dielectric SiO2 nanospheres through electrostatic interaction. The absorption enhancement factor depends on the wavelength and the size of the SiO2 nanoparticles （NPs）. Finite-difference time-domain calculations provide the nearfield intensity mapping of a heterostructure that is composed of a AgBr nanocube in close contact with a SiO2 nanosphere. The electric-field distributions indicate the field enhancement near the SiO2/AgBr interface due to light scattering and absorption enhancement in the AgBr nanocube, implying that the enhanced scattering nearfield increases the absorption cross section of the AgBr nanocube. The absorption cross-section spectra calculated using mie theory agree with the experimental observations. This discovery sheds light on the utilization of dielectric spherical particles to increase the absorption in semiconductor NPs, thus improving the light-harvesting efficiency for solar-energy conversion.

关键词： enhanced scattering nearfield dielectric scattering absorption enhancement mie theory

Manipulated localized surface plasmon resonances in silver nanoshells coated with a spherical anisotropic layer

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Chinese Physics B 2012年第12期21卷 481-486页

作者：蒋书敏吴大建程营刘晓峻 Faculty of Science Jiangsu University School of Physics Nanjing University

The influences of the anisotropy of the outer spherically anisotropic （SA） layer on the far-field spectra and near- field enhancements of the silver nanoshells are investigated by using a modified mie scattering theory. It is found that with the increase of the anisotropic value of the SA layer, the dipole resonance wavelength of the silver nanoshell first increases and then decreases, while the local field factor （LFF） reduces. With the decrease of SA layer thickness, the dipole wavelength of the silver nanoshell shows a distinct blue-shift. When the SA layer becomes very thin, the modulations of the anisotropy of the SA layer on the plasmon resonance energy and the near-field enhancement are weakened. We further find that the smaller anisotropic value of the SA layer is helpful for obtaining the larger near-field enhancement in the Ag nanoshell. The geometric average of the dielectric components of the SA layer has a stronger effect on the plasmon resonance energy of the silver nanoshell than on the near-field enhancement.

关键词： Ag nanoshell spherically anisotropic mie theory localized surface plasmon resonance

Scattering by Large Bubbles: Correction for Debye Coefficient at a Small Number of Sub-Waves

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Optics and Photonics Journal 2022年第4期12卷 53-63页

作者： Zetian Liu College of Science University of Shanghai for Science and Technology Shanghai China

I found that when the Debye theory calculates the far-field scattered light intensity of bubbles, the forward scattered light intensity is quite different from the result calculated by the mie theory due to the convergence problem, so the expression of the Debye coefficient has been revised. I derived the Debye reflectance and transmittance according to the physical meaning of Debye theory and compared them with Fresnel’s formula. I modified the Debye coefficient expressions for bubbles based on the differences between the Debye reflectance and transmittance from the Fresnel formula. Finally, compared with the far-field scattered light intensity calculated by the original Debye theory, the far-field scattered light intensity calculated based on the modified Debye coefficient can obtain more accurate forward scattered light intensity with fewer sub-waves.

关键词： Debye Series Expansion mie theory Bubble Forward Scattered Light Intensity

Fano resonances in heterogeneous dimers of silicon and gold nanospheres

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Frontiers of physics 2018年第3期13卷 121-127页

作者： Qian Zhao Zhong-Jian Yang Jun He Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of Physics and Electronics Central South University Changsha 410083 China

We theoretically investigate the optical properties of dimers consisting of a gold nanosphere and a silicon nanosphere. The absorption spectrum of the gold sphere in the dimer can be significantly altered and exhibits a pronounced Fano profile. Analytical mie theory and numerical simulations show that the Fano profile is induced by constructive and destructive interference between the incident electric field and the electric field of the magnetic dipole mode of the silicon sphere in a narrow wavelength range. The effects of the silicon sphere size, distance between the two spheres, and excitation configuration on the optical responses of the dimers are studied. Our study reveals the coherent feature of the electric fields of magnetic dipole modes in dielectric nanostructures and the strong interactions of the coherent fields with other nanophotonic structures.

关键词： silicon nanosphere gold nanosphere magnetic dipole resonance Fano resonance mie theory