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2008 International Workshop on Metamaterials最新文献

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Experimental study on transparency induced by metamaterials 超材料诱导透明的实验研究
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723535
Jin Hu, Qibo Deng, X. Cai, Xiaoming Zhou, G. Hu
{"title":"Experimental study on transparency induced by metamaterials","authors":"Jin Hu, Qibo Deng, X. Cai, Xiaoming Zhou, G. Hu","doi":"10.1109/META.2008.4723535","DOIUrl":"https://doi.org/10.1109/META.2008.4723535","url":null,"abstract":"With the deformation theory of continuum mechanics, we extend the coordinate transformation method to design arbitrary transformation metamaterials, which are inherently transparent for electromagnetic waves. In the experiment, the metamaterial capable of bending waves is verified. The transparency phenomenon based on the field cancellation effect is also discussed. The composites fabricated with Carbon nanotubes and rubbers are demonstrated experimentally to have the cloaking effect for metal cylinders.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"21 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123543602","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
Improvement on two-dimensional experimental platform for metamaterials 二维超材料实验平台的改进
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723627
Yuan Ji, X. Yang, Q. Cheng, T. Cui
{"title":"Improvement on two-dimensional experimental platform for metamaterials","authors":"Yuan Ji, X. Yang, Q. Cheng, T. Cui","doi":"10.1109/META.2008.4723627","DOIUrl":"https://doi.org/10.1109/META.2008.4723627","url":null,"abstract":"Based on the earlier design and structure of a two-dimensional experimental platform (2D mapper) which was used to measure the scattering parameters of the metamaterial samples, we have succeeded in designing and manufacturing a revised version of two-dimensional experimental platform. Moreover, using the concept of time-division multiplex, we have managed to speed up the measurement of the system up to three times.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122917597","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
Arbitrary N-sided regular polygonal invisible cloak 任意n面正多边形隐形斗篷
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723532
Qun Wu, Kuang Zhang, F. Meng, Lewei Li
{"title":"Arbitrary N-sided regular polygonal invisible cloak","authors":"Qun Wu, Kuang Zhang, F. Meng, Lewei Li","doi":"10.1109/META.2008.4723532","DOIUrl":"https://doi.org/10.1109/META.2008.4723532","url":null,"abstract":"Arbitrary N-sided regular polygonal cylindrical cloaks are proposed and designed basing on the coordinate transformation theory. First, the general expressions of constitutive tensors of the N-sided regular polygonal cylindrical cloaks are derived, then there are some full-wave simulations of the cloaks that are composed of inhomogeneous and anisotropic metamaterials, which will bend incoming electromagnetic waves and guide them to propagate around inner region, such electromagnetic waves will return to their original propagation directions without distorting the waves outside the polygonal cloak. The results of full-wave simulations validate the general expressions of constitutive tensors of the N-sided regular polygonal cylindrical cloaks we derived.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571210","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
Thermally tunable microring resonator for self-collimated beams in photonic crystals 用于光子晶体自准直光束的热可调谐微环谐振器
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723560
Xiaopeng Shen, Kui Han, Haishun Liu, Haipeng Li, G. Tang
{"title":"Thermally tunable microring resonator for self-collimated beams in photonic crystals","authors":"Xiaopeng Shen, Kui Han, Haishun Liu, Haipeng Li, G. Tang","doi":"10.1109/META.2008.4723560","DOIUrl":"https://doi.org/10.1109/META.2008.4723560","url":null,"abstract":"We demonstrate an ultra-compact thermally tunable microring resonator based on self-collimation effect in photonic crystals. Thermo-optical effect and the index of refraction changes due to temperature in microring resonator are used to manipulate dispersion quantity. Finite-difference time-domain method (FDTD) is used to investigate the characteristics of the microring resonator. The new design exhibits an ON-OFF contrast with an extinction ratio of more than 12 dB, an ultra-compact footprint of 3.3times3.3 mum2, and tuning efficiency of 0.08 nm/degC when it operates at the optical communication wavelength lambda =1.55 mum. The design presented may find applications in areas including ultra-compact optical switch and wavelength filer in integrated optical circuits.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117080863","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
Wideband and low loss metamaterials for microwave and RF applications: Fast algorithm and antenna design 用于微波和射频应用的宽带和低损耗超材料:快速算法和天线设计
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723514
Lewei Li, Ya-Nan Li, T. Yeo
{"title":"Wideband and low loss metamaterials for microwave and RF applications: Fast algorithm and antenna design","authors":"Lewei Li, Ya-Nan Li, T. Yeo","doi":"10.1109/META.2008.4723514","DOIUrl":"https://doi.org/10.1109/META.2008.4723514","url":null,"abstract":"The paper is split into two major parts: (1) the first is to look into the EM wave properties in metamaterials and to develop an efficient solvers for their designs; and (2) the second is to try to design the metamaterials for antenna applications. For the efficient algorithms developed, the integral equation solvers accelerated using the adaptive integral (equation) method (AIM) and also the pre-corrected fast Fourier transform (pFFT) technique were developed and various examples in the designs will be demonstrated. In the second case, a single antenna designed using the metamaterial properties is considered, designed, fabricated, and measured. It is shown that the new design of the metamaterial antenna has a low loss (or high gain) and a broad bandwidth and this was never achieved using the conventional technique. The development of the metamaterial antennas was further extended to an array antenna and some interesting and promising results will be provided.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122027767","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
Dynamic spectrum allocation based on GA 基于遗传算法的动态频谱分配
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723619
Ding Xiao-feng, Meng Xu-hang, Han Ke, Niu Dun-jin
{"title":"Dynamic spectrum allocation based on GA","authors":"Ding Xiao-feng, Meng Xu-hang, Han Ke, Niu Dun-jin","doi":"10.1109/META.2008.4723619","DOIUrl":"https://doi.org/10.1109/META.2008.4723619","url":null,"abstract":"According to some specific spectrum rules, this paper represents two kinds of bandwidth scale: relative scale and absolute scale. Genetic algorithm with decimal encoding is applied to analyze and estimate the feasibility of dynamic spectrum allocation.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125189858","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: 4
Design of electromagnetic cloaks for generalized superellipse using coordinate transformations 基于坐标变换的广义超椭圆电磁隐身设计
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723552
K. Yao, C. Li, F. Li
{"title":"Design of electromagnetic cloaks for generalized superellipse using coordinate transformations","authors":"K. Yao, C. Li, F. Li","doi":"10.1109/META.2008.4723552","DOIUrl":"https://doi.org/10.1109/META.2008.4723552","url":null,"abstract":"Invisibility cloaks for generalized superellipse are proposed and investigated. Spatial coordinate transformation approach in polar coordinates form is applied to design the electromagnetic constitutive parameters. The required material properties, which do not involve discontinuities in the cloak shell, are derived in general form, and the cloaking performance is found relates to the properties of the shape to be cloaked. Fullwave finite element simulations are given to confirm the validity of the design, where the cloaking device is illuminated by plane waves and cylindrical waves, respectively. The proposed design provides a possible approach for cloaking many objects with reduced symmetry in shape.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128165997","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: 2
Composite Right/Left Handed Metamaterial structures for RF narrow bandpass filter design 用于RF窄带通滤波器设计的复合左/右超材料结构
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723599
G. Shaik, H. Schenkel, J. Detlefsen, G. Fischer
{"title":"Composite Right/Left Handed Metamaterial structures for RF narrow bandpass filter design","authors":"G. Shaik, H. Schenkel, J. Detlefsen, G. Fischer","doi":"10.1109/META.2008.4723599","DOIUrl":"https://doi.org/10.1109/META.2008.4723599","url":null,"abstract":"In this paper we have proposed Metamaterial based Composite Right-Left Handed transmission line new structure with microstrip gap capacitors and open stub inductors. By using this structure and also to check the possibility of performance, we have designed narrow bandwidth RF bandpass filter in shielded suspended substrate for EGSM base station applications (Tx band, 925 MHz - 960 MHz). To validate the proposed structured design and analysis, the layout board of bandpass filter was fabricated and measured. It is shown that the simulated and measured performances are good in agreement. For three unit cells within a narrow bandwidth of 35 MHz, the layout board of bandpass filter has achieved an insertion loss of nearly -0.7 dB and a stopband of -10 dB approximately.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131288087","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: 4
Manipulate light polarizations by metamaterials: From microwave to optics 利用超材料操纵光偏振:从微波到光学
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723541
J. Hao, Q. Ren, Z. An, Yu-qun Yuan, L. Ran, Zhanghai Chen, M. Qiu, Lei Zhou
{"title":"Manipulate light polarizations by metamaterials: From microwave to optics","authors":"J. Hao, Q. Ren, Z. An, Yu-qun Yuan, L. Ran, Zhanghai Chen, M. Qiu, Lei Zhou","doi":"10.1109/META.2008.4723541","DOIUrl":"https://doi.org/10.1109/META.2008.4723541","url":null,"abstract":"Recently, artificially designed metamaterials have become of considerable interests, because they exhibit extraordinary optical characteristics that do not exist in nature and promise many potential applications, such as negative refraction, subwavelength imaging, and electromagnetic invisibility cloaking. Although creating metamaterials at the optical frequency range faces numerous technological challenges, such materials with particular properties have been realized gradually based on new device concepts. In this talk, we present our efforts to employ specific metamaterials to manipulate the polarization states of incident lights, in both microwave [1, 2] and optical frequency regimes [3]. Experimental results reveal that the maximum polarization conversion ratio (PCR) value can reach 100% in microwave regime (see left figure below) and 92% in optical frequency (see right figure blow) under certain conditions. Theoretical studies combined with numerical simulations show that the governing physics is dominated by the unique reflection properties of the metamaterials.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131330201","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
Acoustic metamaterials of sonic crystals 声学晶体的声学超材料
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723525
Yan-feng Chen, Ming-Hui Lu, Liang Feng, Yong‐yuan Zhu, Shi-ning Zhu, N. Ming
{"title":"Acoustic metamaterials of sonic crystals","authors":"Yan-feng Chen, Ming-Hui Lu, Liang Feng, Yong‐yuan Zhu, Shi-ning Zhu, N. Ming","doi":"10.1109/META.2008.4723525","DOIUrl":"https://doi.org/10.1109/META.2008.4723525","url":null,"abstract":"Acoustic wave exhibits inherently different characters when propagating in sonic band-gap materials. We address negative refractions of acoustic wave both experimentally and theoretically in two dimensional sonic crystals constructed with steel rods embedded in air. With lattice symmetry and artificial ldquoatomsrdquo designing, refraction of acoustic wave in the crystals could be manipulated from positive to negative and from defocusing to focusing with sonic crystal plates. Analogous to enhanced transmission of optical wave, enhanced acoustic wave transmission through narrow slit smaller than wavelength has been established as well, which is modeled as the coupling of surface waves and cavity mode in the slits. These abnormal behaviors show that sonic crystal is emerging as a kind of acoustic metamaterials.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"436 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132471189","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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