检索结果-内蒙古大学图书馆

Design of microscale plasmonic devices for temperature change sensing at visible wavelengths

JOURNAL OF NANOPHOTONICS 2016年第3期10卷

作者： Kusaka, Kosuke Okamoto, Hiroyuki Natl Inst Technol Dept Creat Technol Engn Anan Coll 265 Aoki Minobayashi Anan 7740017 Japan

Photonic devices used in photonic integrated circuits are very important to understand high performance devices. To increase reliability of these devices, temperature characteristics of these devices need to be investigated. Still, no device that can simply sense temperature change in microscale exists. Hence, we have designed microscale plasmonic devices for temperature change sensing at the wavelength of near 633 nm. The designed device consists of a single- and a multimode plasmonic channel waveguide with two different trench depths. The designed device utilizes multimode interference of channel plasmon polaritons for sensing temperature change. The designed device can be applied in the range of the temperature change that silver coefficient of thermal expansion does not greatly change, such as the temperature from room temperature to +/- 30 degrees C. The temperature change sensitivity of the designed device has been numerically confirmed by the finite-difference time-domain method. The temperature change sensitivity of the designed device is a little inferior to that of existing temperature sensing devices. However, the designed device can be realized under one hundredth of the size of existing temperature change sensing devices. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： plasmonic device temperature change sensing multimode interference finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

Research on surface lossy electromagnetic scattering of the scales of Morpho rhetenor butterflies

引用

OPTIK 2016年第10期127卷 4418-4421页

作者： Huangfu, Miao-Miao Liu, Yu-Jie Xie, Xun Zhang, Yun Yang, Hong-Wei Nanjing Agr Univ Dept Phys Nanjing 210095 Jiangsu Peoples R China Wuxi Inst Commerce Sch Electromech Technol Wuxi 214153 Peoples R China

In view to the attenuation of the electromagnetic (EM) wave propagating energy in media, the EM scattering of the simple model of the iridescent tropical butterfly Morpho rhetenor in visible light irradiation is investigated by using finite-difference time-domain (FDTD) method, combined with extensive surface technique. And it is compared with that of the lossless media, and prospective scattering characteristics are verified. As the scattering performance of the structure is characteristic with not only the structural stealth but also the material stealth characteristic, taking all kinds of factors that influence the properties of the media into account, it will help to accurately select and develop late-model high performance stealth material to make a further investigation. (C) 2016 Elsevier GmbH. All rights reserved.

关键词： Morpho rhetenor butterfly Scattering finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

Photonic crystal all-optical switch based on a nonlinear cavity

引用

OPTIK 2016年第8期127卷 3955-3958页

作者： Shirdel, Mehdi Mansouri-Birjandi, Mohammad Ali USB Fac Elect & Comp Engn POB 98164-161 Zahedan 161 Iran

We demonstrate high-speed all-optical switch structure using an ultra-small nonlinear cavity coupled to input and output waveguide. The whole structure is based on a square lattice photonic crystal formed by rods of refractive index n(r) = 3.4 in an air background. finite-difference time-domain method is used to analyze the device characteristics. By analyzing of behavior of structure, we show that switching from OFF to ON occurred because resonant wavelength shift is caused by Kerr effect. The simulation result shows that switch has a high-speed response of similar to 26 ps. Since the structure has an ultra-small length of 12 mu m, it has a potential to use in integrated optical-circuits. (C) 2016 Elsevier GmbH. All rights reserved.

关键词： All-optical switching Photonic crystal cavity finite-difference time-domain method Optical Kerr effect

来源：评论

学校读者我要写书评

暂无评论

domain-wall dynamics in magnetoelastic nanostripes

引用

Physical Review B 2017年第14期95卷 140405(R)-140405(R)页

作者： Théo Mathurin Stefano Giordano Yannick Dusch Nicolas Tiercelin Philippe Pernod Vladimir Preobrazhensky Institute of Electronics Microelectronics and Nanotechnology - UMR 8520 LIA LICS Université Lille CNRS Centrale Lille ISEN Université Valenciennes F-59000 Lille France

We numerically demonstrate the possibility to manipulate domain walls in magnetoelastic nanostripes by means of uniform mechanical stresses. The symmetry breaking of the magnetic states in unidimensional ferromagnets allows the control of the domain-wall position or velocity in geometrically tailored nanostripes coupled to piezoelectric substrates. We further predict that this approach yields unusual domain-wall configurations with velocities of the same order of magnitude as that induced by magnetic fields or spin-polarized currents, while the energy consumption is considerably smaller.

关键词： Ferromagnetism Magnetoelastic effect Magnetoelectric effect Piezoelectricity Ferromagnets Magnetic multilayers Multiferroics Piezoelectrics Thin films finite-difference time-domain method Landau-Lifschitz-Gilbert equation methods in magnetism

来源：评论

学校读者我要写书评

暂无评论

Manipulating the Lorentz force via the chirality of nanoparticles

引用

OPTICAL MATERIALS 2016年 62卷 411-418页

作者： Wang, Maoyan Li, Hailong Dong, Yuliang Zhang, Xiaochuan Du, Ming Wang, Rui Xu, Tong Wu, Jian Univ Elect Sci & Technol China Sch Phys Elect Chengdu 610054 Peoples R China Chengdu Univ Informat Technol Coll Optoelect Technol Chengdu 610225 Peoples R China China Res Inst Radiowave Propagat Natl Key Lab Elect Environm Qingdao 266107 Peoples R China

We demonstrate that a single plane wave pulls a chiral nanoparticle toward the light source. The nanoparticle exhibits optical gain in a particular wavelength region. The equivalence of the generalized and alternative expressions of the Lorentz force density relating to bound charges for chiral media is numerically validated. By considering the two-dimensional electromagnetic problem of incident plane waves normally impinged on active chiral cylinders, it is shown that the gradient force is mainly contributed by the bound electric and magnetic current densities of the cross-polarized waves. We also investigate how the medium parameters and impedance mismatch can be used to manipulate the pulling or pushing Lorentz forces between two chiral cylinders. This finding may provide a recipe to understand the light interaction with multiple chiral nanoparticles of arbitrary shapes (in general) with the aid of the numerical approach. It could be a promising avenue in controlling the optical micromanipulation for chiral nanoparticles with mirroring asymmetry. (C) 2016 Elsevier B.V. All rights reserved.

关键词： Chiral Lorentz force Dispersive finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

FDTD Simulation of Lightning Current in a Multilayer CFRP Panel With Triangular Prism Cells

引用

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY 2016年第1期58卷 327-330页

作者： Nakagawa, Masaki Baba, Yoshihiro Tsubata, Hiroyuki Nishi, Takayuki Fujisawa, Hiroshi Doshisha Univ Kyoto 6100321 Japan Aerosp Co Fuji Heavy Ind Ltd Utsunomiya Tochigi 3210106 Japan

Transient distribution of lightning current, which flows in a multilayer carbon fiber reinforced plastic (CFRP) material of aircraft, has been studied using the finite difference time domain (FDTD) method with triangular prism cells. The use of triangular prism cells allows us to represent a multilayer CFRP panel, each layer of which has a fiber direction of 45 degrees, 90 degrees, -45 degrees or 0 degrees and, therefore, has an anisotropic conductivity. An experiment for evaluating the transient distribution of magnetic field over the surface of a multilayer CFRP panel has also been carried out. The FDTD-computed distribution of magnetic field agrees reasonably well with the corresponding measured one. This shows that the present FDTD simulation with triangular prism cells is valid and effective in analyzing lighting current in a CFRP aircraft.

关键词： Aircraft carbon fiber reinforced plastic finite-difference time-domain method lightning

来源：评论

学校读者我要写书评

暂无评论

Influence of biological subject, shielding cage, and resonance frequency on radio wave propagation in a birdcage coil

引用

ELECTRONICS LETTERS 2016年第10期52卷 801-U45页

作者： Seo, J. -H. Ryu, Y. Han, S. -D. Song, H. Kim, H. -K. Kim, K. -N. Gachon Univ Neurosci Res Inst Inchon South Korea Gachon Univ Dept Biomed Engn Inchon South Korea

Radio wave propagation of three types of birdcage transmit/receive radio-frequency (RF) coils (lowpass filter, highpass filter, and bandpass filter configurations) was analysed for mouse body magnetic resonance imaging at main magnetic fields of 1.5, 3.0, 4.7, 7.0, 9.4, and 11.7 T (Larmor frequencies of 63.87, 127.74, 200, 300, 400, and 500 MHz) in terms of magnetic (|B-1|) field sensitivity and homogeneity. The observed radio wave propagation in the central axial |B-1| field, as influenced by the biological subject, was calculated numerically in the finite-difference time-domain method and compared with assessment criteria using the mean value and standard deviation. The results for different Larmor frequencies RF shielding cage configurations, and biological subject loading versus unloading were compared and are discussed in detail.

关键词： radiowave propagation coils radio transmitters radio receivers low-pass filters high-pass filters band-pass filters biomedical MRI finite difference time-domain analysis biomedical communication biological subject resonance frequency radio wave propagation birdcage transmit-receive radiofrequency coil RF coil lowpass filter configuration highpass filter configuration bandpass filter configuration mouse body magnetic resonance imaging numerical analysis finite-difference time-domain method RF shielding cage configuration magnetic flux density 1 5 T magnetic flux density 3 0 T magnetic flux density 4 7 T magnetic flux density 7 0 T magnetic flux density 9 4 T magnetic flux density 11 7 T frequency 63 87 MHz frequency 127 74 MHz frequency 200 MHz frequency 300 MHz frequency 400 MHz frequency 500 MHz

来源：评论

学校读者我要写书评

暂无评论

Study of blood plasma optical properties in mice grafted with Ehrlich carcinoma in the frequency range 0.1-1.0 THz

引用

QUANTUM ELECTRONICS 2017年第11期47卷 1031-1040页

作者： Smolyanskaya, O. A. Kravtsenyuk, O. V. Panchenko, A. V. Odlyanitskiy, E. L. Guillet, J. P. Cherkasova, O. P. Khodzitsky, M. K. ITMO Univ Kronverksky Prosp 49 St Petersburg 197101 Russia Minist Healthcare Russian Federat NN Petrov Res Inst Oncol Leningradskaya Ul 68 St Petersburg 197758 Russia Bordeaux Univ IMS UMR CNRS 5218 351 Cours Liberat F-33405 Talence France Russian Acad Sci Inst Laser Phys Siberian Branch Prosp Akad Lavrentyeva 13-3 Novosibirsk Russia

In the course of in vitro studies of blood of laboratory animals with progressing Ehrlich carcinoma, we have revealed the change of the blood plasma optical properties in the THz range, which can be used for developing the express diagnostics of the presence of oncological diseases. An applied software package is elaborated that allows the phantoms of biological samples having a complex structure to be numerically simulated and the parameters of the electromagnetic wave reflected from these samples in the THz frequency range to be calculated.

关键词： THz time-domain spectroscopy (THz TDS) Ehrlich tumour SHR mice line blood plasma finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

Dipole, Quadrupole, and Octupole Plasmon Resonance Modes in Ag Nanoring Structure: Local Field Enhancement in the Visible and Near Infrared Regions

引用

PLASMONICS 2016年第1期11卷 37-44页

作者： Yi, Zao Niu, Gao Chen, Jiafu Luo, Jiangshan Liu, Xiaonan Yi, Yong Duan, Tao Kang, Xiaoli Ye, Xin Wu, Pinghui Tang, Yongjian Southwest Univ Sci & Technol Joint Lab Extreme Condit Matter Properties Mianyang 621900 Peoples R China Res Ctr Laser Fus CAEP Mianyang 621900 Peoples R China China Acad Engn Phys Res Ctr Laser Fus Mianyang 621900 Peoples R China Sichuan Univ Coll Mat Sci & Engn Chengdu 610064 Peoples R China Southwest Univ Sci & Technol Sch Mfg Sci & Engn Mianyang 621010 Peoples R China Zhejiang Univ Dept Opt Engn State Key Lab Modern Opt Instrumentat Hangzhou 310027 Zhejiang Peoples R China

Here, we provide a simulation based on finite-difference time-domain (FDTD) way of the properties of surface plasmons on Ag nanoring and study their electric field distribution in order to identify different multiple surface plasmon resonances. We can obtain the symmetric field distribution that parallels to the orientation of direction of incident light. We find their propagation can be controlled. And we discuss some of the parameters that influence the optical response of the Ag nanoring. Adjustment of nanoring radius (inner radius and outer radius) and height can change the absorption intensity and the resonance peaks. The simulation of the field distribution also displays that the location of the field enhancement is specified by the different resonance patterns. Dipole, quadrupole, and octupole plasmon resonance modes can be found in the Ag nanoring at resonance wavelength. This is an important step toward a thorough understanding of plasmon resonance in Ag nanorings.

关键词： Ag nanoring Surface plasmons Octupole plasmon resonances finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

Optical characteristics of rounded silver nanoprisms

引用

OPTICAL REVIEW 2016年第2期23卷 260-264页

作者： Mori, Tomohiro Yamaguchi, Kenzo Tanaka, Yasuhiro Suzaki, Yoshifumi Haraguchi, Masanobu Kagawa Univ Fac Engn Dept Adv Mat Sci 2217-20 Hayashicho Takamatsu Kagawa 7610396 Japan Ind Technol Ctr Wakayama Prefecture 60 Ogura Wakayama 6496261 Japan Univ Tokushima Inst Sci & Technol 2-1 Minamijosanjima Tokushima 7708506 Japan

We analyzed numerical optical characteristics of silver nanoprisms with rounded corners using the three-dimensional finite-difference time-domain method. The enhancement of the electric field was decreased from 240 to 13 times by introducing a large radius of curvature at the nanoprism corners such that it became a cylinder. This caused the optical multi-mode to change to single dipole mode. In the largest local electric field enhancement using the bowtie structure, which consisted of a pair of nanoprisms with rounded corners (the curvature radius and the gap distance were 8.66 and 1 nm, respectively), the electric field was enhanced by a factor of 360 at the hot-spot. The bowtie structure that has non-zero curvature radii produces a larger electric field enhancement than does the single nanoprism without a curvature radius. Furthermore, the numerical simulation elucidates that the change of the curvature radius and the change of the gap distance have the same influence on the electric field enhancement.

关键词： Surface plasmon Nanoprism Bowtie structure Rounded corners finite-difference time-domain method

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：