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2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics最新文献

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Bound and leaky modes in PT-symmetric epsilon-near-zero metamaterial slabs pt对称epsilon-近零超材料平板的束缚模和漏模
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948667
S. Savoia, Vincenzo Galdi
{"title":"Bound and leaky modes in PT-symmetric epsilon-near-zero metamaterial slabs","authors":"S. Savoia, Vincenzo Galdi","doi":"10.1109/METAMATERIALS.2014.6948667","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948667","url":null,"abstract":"We show that a judicious combination of balanced gain and loss, inspired by parity-time symmetry concept, can be exploited in epsilon-near-zero metamaterials to support exponentially-localized bound modes that propagate without attenuation. We study the dispersion relationship of these modes for moderate levels of gain/loss, and the exponentially-localized bound modes that propagate without attenuation. We study the dispersion relationship of these modes for moderate levels of gain/loss, and their eventual transition to leaky modes below a gain/loss threshold. These waveguiding/radiation mechanisms may open up intriguing venues for novel nanophotonics platforms.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122784271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A circular polarization reconfigurable antenna based on reconfigurable electromagnetic band-gap structures 一种基于可重构电磁带隙结构的圆极化可重构天线
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948628
K. Krishnamoorthy, B. Majumder, J. Mukherjee, K. P. Ray
{"title":"A circular polarization reconfigurable antenna based on reconfigurable electromagnetic band-gap structures","authors":"K. Krishnamoorthy, B. Majumder, J. Mukherjee, K. P. Ray","doi":"10.1109/METAMATERIALS.2014.6948628","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948628","url":null,"abstract":"A circular polarization reconfigurable dipole antenna allowing switching between two circular polarizations is proposed. It consists of a linearly polarized dipole antenna and array of polarization dependant EBG structures as the ground plane. Switching elements are used on the ground plane to get the required reflection phase for reconfigurable circular polarization.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126164314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Absorption and reflection characteristics of a circular disk with gridded-square loop-loaded FSS structure for X-band operations 用于x波段操作的网格-方形环负载FSS结构圆盘的吸收和反射特性
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948546
S. Can, A. Egemen Yilmaz
{"title":"Absorption and reflection characteristics of a circular disk with gridded-square loop-loaded FSS structure for X-band operations","authors":"S. Can, A. Egemen Yilmaz","doi":"10.1109/METAMATERIALS.2014.6948546","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948546","url":null,"abstract":"This paper presents the absorption and reflection characteristics of a circular disk with gridded-square loop-loaded Frequency Selective Surface (FSS). The paper demonstrates the parameters affecting the absorption and reflection characteristics, and additionally performs the parametric analysis of the proposed structure. The parametric performance is investigated in two aspects: the former being the geometry, and the latter being the material properties. The proposed structure achieves to absorb the electromagnetic waves between 8 and 13GHz; therefore, that structure is available for use in X-band applications to make an invisible surface for the aforementioned band. Moreover, tunability of the frequency is stressed via varying the parameters in light of the parametric analysis in this study.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126395924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effective dynamic susceptibility of a one-dimensional array of ferromagnetic wires 一维铁磁线阵列的有效动态磁化率
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948541
R. Zivieri
{"title":"Effective dynamic susceptibility of a one-dimensional array of ferromagnetic wires","authors":"R. Zivieri","doi":"10.1109/METAMATERIALS.2014.6948541","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948541","url":null,"abstract":"In this paper the calculation of the effective dynamic susceptibility for a one-dimensional array of permalloy rectangular nanowires periodic along the in-plane x direction is presented. The external magnetic field is assumed aligned along the long side of the wires (y direction) and the in-plane Bloch wave vector is along the wires width (x direction). The calculation is performed by means of a finite-difference micromagnetic approach, the Lagrangian-based dynamical matrix method. It is shown that the excited spin-wave mode is always the quasi-uniform or fundamental mode of the spectrum. This spin excitation has a non-uniform amplitude along the wire width due to confinement with no nodal planes and can be regarded as the metamaterial wave of the one-dimensional periodic system.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"7 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129867362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Topology optimization of an electromagnetic cloak using a ferrite material 铁氧体材料电磁斗篷的拓扑优化
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948572
M. Otomori, T. Yamada, J. Andkjær, K. Izui, S. Nishiwaki, N. Kogiso
{"title":"Topology optimization of an electromagnetic cloak using a ferrite material","authors":"M. Otomori, T. Yamada, J. Andkjær, K. Izui, S. Nishiwaki, N. Kogiso","doi":"10.1109/METAMATERIALS.2014.6948572","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948572","url":null,"abstract":"This paper numerically demonstrates that a systematic design approach based on topology optimization can be applied to find the layout of a ferrite material that functions as an electromagnetic cloak with a relatively small cloaking region. The numerical results indicate that the frequency-dependent aspect of a ferrite material's permeability may enable cloak designs with novel functions, such as on-off operation in response to on-off application of an external magnetic field.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124662084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-local susceptibility for a bounded homogenized wire medium in the spatial domain 空间域中有界均匀化导线介质的非局部磁化率
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948538
G. Hanson, M. Silveirinha, P. Burghignoli, A. Yakovlev
{"title":"Non-local susceptibility for a bounded homogenized wire medium in the spatial domain","authors":"G. Hanson, M. Silveirinha, P. Burghignoli, A. Yakovlev","doi":"10.1109/METAMATERIALS.2014.6948538","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948538","url":null,"abstract":"Here, we present different formulations for wave interaction problems of bounded homogenized wire media in the spatial domain. We demonstrate that two previous methods based on the wave expansion and transport equation are equivalent to each other, and to a charge carrier model involving particle reflection at the boundary. The role of a virtual interface is discussed, and it is found to be analogous to that for natural excitonic materials. An important observation is that the non-local susceptibility x(r, r') for a non-translationally invariant homogenized wire medium is represented by a Green's function in the spatial domain subject to boundary conditions at the material boundaries.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130939893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resonant mode dynamics of two-dimensional ferromagnetic antidot lattices in the effective stripe limit 二维铁磁反点晶格在有效条纹极限下的共振模式动力学
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948542
R. Zivieri
{"title":"Resonant mode dynamics of two-dimensional ferromagnetic antidot lattices in the effective stripe limit","authors":"R. Zivieri","doi":"10.1109/METAMATERIALS.2014.6948542","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948542","url":null,"abstract":"The resonant mode dynamics of two-dimensional permalloy antidot lattices in the nanometric range is studied theoretically in the effective stripe limit. The analysis is performed both according to a finite-difference micromagnetic approach, the dynamical matrix method, and by means of analytical calculations. The external magnetic field applied along the y-axis aligns the static magnetization along the same direction which induces the formation of “surface magnetic charges” on the border of the holes. The passage from a discontinuous to a continuous effective “surface magnetic charges” distribution in the effective stripe limit has a strong influence on the dynamics of the resonant mode of the system. Due to the large demagnetizing field it is shown via analytical calculations that the resonant mode of the effective one-dimensional stripe cannot exist above a given aspect ratio. The dynamical properties of the resonant mode dramatically change passing from a two-dimensional to a one-dimensional magnonic metamaterial.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122439419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum plasmonics in graphene nano-flakes: A time-dependent density functional theory study 石墨烯纳米薄片中的量子等离子体:随时间变化的密度泛函理论研究
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948679
Wei Wu, N. Panoiu
{"title":"Quantum plasmonics in graphene nano-flakes: A time-dependent density functional theory study","authors":"Wei Wu, N. Panoiu","doi":"10.1109/METAMATERIALS.2014.6948679","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948679","url":null,"abstract":"The optical spectra for a variety of single and coupled graphene nano-flakes have been studied using time-dependent density functional theory within generalized gradient approximation. The time evolution of the charge density induced by a continuous-wave electrical field excitation has been calculated as well, in order to investigate the plasmonic properties of these graphene nano-structures. For the small graphene nano-flakes (diameter ~1nm), the edge plasmons are dominant, whereas for larger ones (diameter ~2nm) the edge plasmons are accompanied by multipolar collective charge oscillations, a typical characteristics for surface plasmons. This study might be used to guide the experimental observation of quantum plasmons in graphene nano-structures.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126602513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Semi-analytic technique for the polarizability extraction of chiral helix particles 手性螺旋粒子极化率提取的半解析技术
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948629
T. Karamanos, N. Kantartzis
{"title":"Semi-analytic technique for the polarizability extraction of chiral helix particles","authors":"T. Karamanos, N. Kantartzis","doi":"10.1109/METAMATERIALS.2014.6948629","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948629","url":null,"abstract":"In this paper, a consistent method for the polarizability matrix retrieval of chiral helix particles is presented. First, it is assumed that, under certain circumstances, the particle can be modelled by electric and magnetic dipoles placed on its shape center. Then, the chiral particles are positioned at a 2D array illuminated by plane waves, and dipole moments are analytically calculated as a function of polarizabilities and incident waves. The scattered fields from the same surface are, also, analytically computed as a function of dipole moments, while the resulting non-linear system is numerically solved for the desired polarizabilities. The proposed algorithm is verified by means of a chiral helix particle at microwave frequencies.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127800257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Huygens source nanoparticle lasers and their applications 惠更斯源纳米粒子激光器及其应用
2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI: 10.1109/METAMATERIALS.2014.6948583
I. Liberal, R. Gonzalo, I. Ederra, R. Ziolkowski
{"title":"Huygens source nanoparticle lasers and their applications","authors":"I. Liberal, R. Gonzalo, I. Ederra, R. Ziolkowski","doi":"10.1109/METAMATERIALS.2014.6948583","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2014.6948583","url":null,"abstract":"An induction theorem-inspired approach is adopted for the design of a Huygens source nanoparticle laser. The proposed nanoparticle consists of a three-layer silicon-silver-silicon (Si-Ag-Si) concentric sphere, which enables the amplified and balanced excitation of the electric and magnetic dipole modes with scattering efficiencies in excess of 600. Moreover, with its dipolar modes designed to be in balance, its scattering directivity pattern is an almost perfect replica of the cardioid radiation pattern of a Huygens source, featuring Dscat = 3 in the forward direction and a null (Dscat ≃ 0) in the backward direction. Innovative electromagnetic force manipulation and trapping effects that are empowered with Huygens source nanoparticle lasers are considered.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116624427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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