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2012 International Workshop on Metamaterials (Meta)最新文献

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Large scale cylindrical cloak in free space without superluminal propagation 无超光速传播的自由空间大尺度圆柱形斗篷
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.1109/META.2012.6464937
Hongsheng Chen, Su Xu, Baile Zhang, Runren Zhang, H. Moser, Zhi Shen, Yang Xu, Xianmin Zhang
{"title":"Large scale cylindrical cloak in free space without superluminal propagation","authors":"Hongsheng Chen, Su Xu, Baile Zhang, Runren Zhang, H. Moser, Zhi Shen, Yang Xu, Xianmin Zhang","doi":"10.1109/META.2012.6464937","DOIUrl":"https://doi.org/10.1109/META.2012.6464937","url":null,"abstract":"Despite its remarkably fast development in the past few years, the technology of invisibility cloaking is still facing many serious bottlenecks, e.g. the bandwidth, the superluminal limitation, dispersion, loss, etc. In this paper, we experimentally demonstrated an alternative approach of invisibility cloaking that can combine technical advantages of all current major cloaking strategies in a unified manner and thus can solve bottlenecks of individual strategies. A broadband cylindrical invisibility cloak in free space is designed based on scattering cancellation (the approach of previous plasmonic cloaking), and implemented with anisotropic metamaterials (a unique property of previous transformation-optics cloaking). Particularly, non-superluminal speed of light in the cloak, a superior advantage of non-Euclidian conformal mapping cloaks, is inherited in this design, and thus is the reason of its relatively broad bandwidth. This demonstration provides a possibility for future practical implementation of cloaking devices at large scales.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130198531","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
Second-harmonic generations in fishet metamaterials 鱼类超材料中的二次谐波代
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.1109/META.2012.6464945
Shiwei Tang, D. Cho, Hao Xu, Wei Wu, Y. Shen, Lei Zhou
{"title":"Second-harmonic generations in fishet metamaterials","authors":"Shiwei Tang, D. Cho, Hao Xu, Wei Wu, Y. Shen, Lei Zhou","doi":"10.1109/META.2012.6464945","DOIUrl":"https://doi.org/10.1109/META.2012.6464945","url":null,"abstract":"We employed both theoretical calculations and experiments to study the nonlinear responses in optical metamaterials. The spectra of second-harmonic generations measured on a fishnet metamaterial are in quantitative agreements with calculations based on full-wave numerical simulations combined with field integrations, both exhibiting ~80 times enhancements at the magnetic resonance frequency. Our calculations explained several interesting features observed experimentally, and suggested an optimal metamaterial structure to yield the strongest nonlinear signals.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132721578","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 novel approach to further decrease the thickness of ultrathin perfect metamaterial absorbers 一种进一步减小超薄完美超材料吸收体厚度的新方法
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.1109/META.2012.6464921
Li Huang, D. R. Chowdhury, S. Ramani, M. Reiten, Shengnian Luo, A. Azad, A. Taylor, Hou-Tong Chen
{"title":"A novel approach to further decrease the thickness of ultrathin perfect metamaterial absorbers","authors":"Li Huang, D. R. Chowdhury, S. Ramani, M. Reiten, Shengnian Luo, A. Azad, A. Taylor, Hou-Tong Chen","doi":"10.1109/META.2012.6464921","DOIUrl":"https://doi.org/10.1109/META.2012.6464921","url":null,"abstract":"This work presents a novel approach to further decrease the thickness of the ultra thin perfect metamaterial absorbers by adjusting the geometric dimensions of the resonators. Both simulational and experimental results with a typical metamaterial absorber structure show that the thickness of the absorber decreases from ~8 μm to ~4 μm by increasing the width of the cross-resonator from 10 μm to 40 μm. The results can be well explained with the interference theory which shows that the near-unity absorption is due to a destructive interference of the multiple reflections in the metamaterial absorber.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115516379","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
The role of single loading dielectric layer on properties of frequency selective surfaces 单负载介质层对频率选择表面性能的影响
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.1109/META.2012.6464953
S. J. Zhang, J. Liu, M. L. Wang, W. M. Ms, W. Liang, X. Liu, X. Hou
{"title":"The role of single loading dielectric layer on properties of frequency selective surfaces","authors":"S. J. Zhang, J. Liu, M. L. Wang, W. M. Ms, W. Liang, X. Liu, X. Hou","doi":"10.1109/META.2012.6464953","DOIUrl":"https://doi.org/10.1109/META.2012.6464953","url":null,"abstract":"Frequency selective surfaces (FSS) have attracted researchers from many subjects for decades for its tempting applications such as for radome radar cross section (RCS) reduction, sub-reflector, et.al. Many studies was focused on different type FSS, such as unit shape, dielectric loading, layers of FSS. And it is of popular consideration that double dielectric loading on both sides of FSS be an ideal configuration. In this paper, the type of single side loading, which is more similar to the practical configuration, was studied with the numerical method. And it is found that both the thickness of thick loading layer and the constant of the thin substrate play key roles to the properties of FSS.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116056809","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
Rapid analysis of metamaterial structures using the discrete Maxwell;s equation method 用离散麦克斯韦方程方法快速分析超材料结构
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.1109/META.2012.6464955
Q. Guo, Y. Q. Ma, X. Cui, Y. Liu
{"title":"Rapid analysis of metamaterial structures using the discrete Maxwell;s equation method","authors":"Q. Guo, Y. Q. Ma, X. Cui, Y. Liu","doi":"10.1109/META.2012.6464955","DOIUrl":"https://doi.org/10.1109/META.2012.6464955","url":null,"abstract":"We propose a discrete Maxwell equation (DME) method for the rapid analysis of multi-layered metamaterial structures. Different from the conventional numerical methods, which make discretizations within the problem space and use interpolating or iterative technique to obtain the corresponding electromagnetic fields, the DME method is strict in the discretization procedure without any numerical error. The average permittivity and permeability have been used in the DME method, where the spatial dispersion has been considered in details. This method could use very sparse grids in the simulation, which is much more efficient than the conventional numerical methods where 1/10 wavelength for each grid is required. We show that the DME method is particularly valid to the analysis of one-dimensional multi-layered metamaterial structures, where each layer is composed of resonant or nonresonant unit cells. The DME method can greatly reduce the CPU time cost in the multi-layered metamaterial structures, which will find great applications in the microwave and optical metamaterial designs.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130445923","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
Applying effective medium theory in characterizing dielectric constant of solids 应用有效介质理论表征固体介电常数
2012 International Workshop on Metamaterials (Meta) Pub Date : 2012-10-01 DOI: 10.2528/PIERL12072108
Sucheng Li, Ruirui Chen, Shahzad Anwar, Weixin Lu, Yun Lai, Huanyang Chen, Bo Hou, Fengran Ren, Bangming Gu
{"title":"Applying effective medium theory in characterizing dielectric constant of solids","authors":"Sucheng Li, Ruirui Chen, Shahzad Anwar, Weixin Lu, Yun Lai, Huanyang Chen, Bo Hou, Fengran Ren, Bangming Gu","doi":"10.2528/PIERL12072108","DOIUrl":"https://doi.org/10.2528/PIERL12072108","url":null,"abstract":"We present a simple approach to measure the dielectric constant of solid materials. In this approach, the powder for the solid under investigation is mixed with the oil at a specific volume fraction. By measuring the oil and the mixture, the permittivity of the inclusion, i.e. the solid, can be accurately derived from the Maxwell-Garnett effective medium theory. With this method, the strict requirements for the solid shape and surface flatness in the conventional measuring configurations can be waved off, and meanwhile the broadband permittivity can be obtained. The demonstrations on alumina and glucose show this approach is valid and robust.","PeriodicalId":315697,"journal":{"name":"2012 International Workshop on Metamaterials (Meta)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126844964","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: 14
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