{"title":"A new approach for fundamental dark - bright solitons in nonlinear left-handed materials","authors":"M. Johan","doi":"10.1109/META.2008.4723527","DOIUrl":"https://doi.org/10.1109/META.2008.4723527","url":null,"abstract":"We investigate the nonlinear propagation of electromagnetic waves in Kerr like left-handed materials. Maxwellpsilas equations for electric and magnetic fields lead naturally within the slowly varying envelope approximation to a nonlinear Schrodinger equations which admits dark and bright soliton solutions. It shows the left and right-handed materials have dark and bright soliton solutions respectively.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"317 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":"121011255","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}
Q. Zhou, E. Liang, P. Ding, L. Zhang, Y. Yuan, Q. Xue
{"title":"Modes selecting in all-dielectric resonators with different shapes","authors":"Q. Zhou, E. Liang, P. Ding, L. Zhang, Y. Yuan, Q. Xue","doi":"10.1109/META.2008.4723574","DOIUrl":"https://doi.org/10.1109/META.2008.4723574","url":null,"abstract":"Left-handed behaviors of all-dielectric resonators with different cross section shapes have been studied. It is shown that simultaneous negative permittivity and permeability can be realized at either the first or the second resonant modes governed by the shape of the cross section. For a dielectric resonator with rectangular cross section of 0.5 mm times 2 mm, the second resonant mode resulting from the electric and magnetic dipole moments are expected to give rise to simultaneous negative effective permittivity and permeability. Whereas, simultaneous negative effective permittivity and permeability can be achieved at the first resonant mode for a dielectric resonator with a square cross section of 1 mm times 1 mm.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"59 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":"130478411","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}
{"title":"A compact low-profile wideband omni-directional microstrip patch loading composite right/left-handed transmission line","authors":"Duan Zhang-shan, Qu Shao-bo, Zhang Jie-qiu, Wu Yu","doi":"10.1109/META.2008.4723604","DOIUrl":"https://doi.org/10.1109/META.2008.4723604","url":null,"abstract":"A compact and low-profile wideband omni-directional microstrip patch antenna is proposed. The antenna is loaded by a novel spiral composite right/left-handed (CRLH) transmission line (TL), which is realized by replacing the interdigital capacitors of the conventional CRLH-TL with the spiral inductors. The antenna is composed with a four arms spiral line, a circle patch, four stubs connecting the patch and the ground. The antenna is fed by a standard SMA coaxial connector from the bottom. The bandwidth of the proposed antenna is up to 25.3% (VSWR<2). The antenna has a field pattern with a vertical electric field polarization, and has an omni-directional radiation pattern. The omni-directional radiation pattern is stable in desired operating band.","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":"131257749","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}
{"title":"Theoretical studies on the epsilon’s nonlinearity of a left-handed material","authors":"Z. Wang, Li Hua Wu, X. Zhang","doi":"10.1109/META.2008.4723543","DOIUrl":"https://doi.org/10.1109/META.2008.4723543","url":null,"abstract":"In order to realize the tunable transmission properties of left-handed materials (LHMs), based on the nonlinear optics theory, we study the epsilonpsilas nonlinearity of a two-dimensional composite created by arrays of wires and split-ring resonators embedded into a nonlinear dielectric. We calculate the dependences of the real part and imaginary part of the effective permittivity of the structure on the varying external magnetic field strength. The results show that the real part of the effective permittivity has hysteresis structures, and the switching of the material among different kinds (RHM, LHM, ENG, MNG) under some conditions can be controlled by a proper choice of the strength of the external magnetic field (intensity of incident electromagnetic waves) at a certain frequency. This phenomenon may be used to realize the switching between left-handed materials and right-handed materials.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"11 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":"131850151","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}
{"title":"Tunable plasmonic metamaterials based on fractal geometry","authors":"Lei Zhou, Xueqin Huang, Shiyi Xiao","doi":"10.1109/META.2008.4723516","DOIUrl":"https://doi.org/10.1109/META.2008.4723516","url":null,"abstract":"Surface plasmon polaritons (SPPs) are elementary electromagnetic (EM) excitations bounded at a metal/dielectric interface. Due to two important features - local field enhancement and subwavelength resolution capability - of the SPP, it has attracted considerable attention recently and many SPP-based applications were proposed or demonstrated. However, for a natural material, its plasmon frequency (pomega) is fixed by electron density. This restriction limits the aforementioned SPP-based applications to a wider frequency regime. In this talk, we show that a metallic plate with subwavelength fractal-shaped slits supports SPpsilas with omegaptuned efficiently by the geometry of the fractal structure. We derive effective-medium models to describe such tunable plasmonic metamaterials, and found that the latter can mimic plasmonic metals in frequency regimes beyond the (fixed) plasmon frequencies of natural metals (gold, silver, etc.). We show that our plasmonic metamaterials possess many applications. As one example, we show that one can use it to focus light sources with subwavelength imaging abilities and enhanced field strengths. Finite-difference-time-domain (FDTD) simulations are performed to design realistic structures and verify all predicted phenomena.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"9 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":"113931393","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}
P. Ding, E. Liang, Q. Zhou, L. Zhang, Y. Yuan, Q. Xue
{"title":"Influence of metal-layer thickness on the losses in fishnet metamaterial","authors":"P. Ding, E. Liang, Q. Zhou, L. Zhang, Y. Yuan, Q. Xue","doi":"10.1109/META.2008.4723573","DOIUrl":"https://doi.org/10.1109/META.2008.4723573","url":null,"abstract":"The influence of metal-layer thickness on the left-handed performance of fishnet metamaterial is investigated. It is found that an appropriate thickness design of the metal layer is important for reducing losses and increasing the figure of merit. Low-loss and extraordinary transmission can be achieved for the fishnet metamaterial operating around 1.5 mum with the metal-layer thickness of about 90 nm, which is larger than the conventionally reported thickness of about two times of the skin depth.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"16 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":"128626922","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}
{"title":"Broadside subwavelength microstrip antennas partially loaded with metamaterials","authors":"K. S. Zheng, Wai-Yip Tam, D. B. Ge","doi":"10.1109/META.2008.4723526","DOIUrl":"https://doi.org/10.1109/META.2008.4723526","url":null,"abstract":"A new designing for solving zero radiation problem of subwavelength microstrip antenna at broadside loaded with double-positive material and double-negative metamaterials is presented. The subwavelength rectangular microstrip antenna does not radiate efficiently at broadside because of the radiation from the two radiating edges cancels each other. So, the new structure of subwavelength microstrip antenna array made of two identical subwavelength rectangular microstrip antenna partially filled with metamaterials is proposed and studied. Due to the phase compensation properties of double-negative metamaterials, arbitrarily low resonant frequency can be also obtained for a fixed dimension for the proposed antenna array. And, two elements for the new antenna array are aligned regularly along the coordinates and the phase difference between the excitation sources of two-element subwavelength antenna array is set to a special value pi. With this scheme, the radiation of antenna array at broadside in the direction normal to the radiator and the ground plane is clearly enhanced by comparing radiation patterns between the subwavelength microstrip antenna and the subwavelength antenna array.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"14 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":"124148435","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}
{"title":"Study of active superlens using an active metamaterial model","authors":"N. N. Wan, Da Huang, Q. Cheng, T. Cui","doi":"10.1109/META.2008.4723622","DOIUrl":"https://doi.org/10.1109/META.2008.4723622","url":null,"abstract":"We propose a pi-shaped circuit model for active metamaterials using periodic circuit structures with series inductors and shunt capacitors (LC) and series capacitors and shunt inductors (CL). By inserting negative resistances in the LC and CL structures, active components are fulfilled. Then we attain the superlens using three slabs of these active metamaterial circuit structures and finally show that the amplitude of voltage will be augmented on two interfaces after adding the active/lossy components, which evidently illustrates the active features of the medium.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"82 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":"124465856","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}
{"title":"Electric and magnetic responses from metamaterial unit cells at terahertz","authors":"W. Tang, Q. Cheng, T. Cui","doi":"10.1109/META.2008.4723588","DOIUrl":"https://doi.org/10.1109/META.2008.4723588","url":null,"abstract":"Metamaterials are artificial media with novel electromagnetic properties. We study the metamaterial unit cells at terahertz frequencies, investigate their electric and magnetic responses to the incident wave, and retrieve their effective material parameters. Simulation results reveal the origins of the effective permittivity and permeability and prove the predicted responses persuasively. In addition, we prove that symmetric resonant structures exhibit purer resonance properties than the asymmetric ones.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"45 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":"131458628","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}
{"title":"Influence of structural parameters on the resonance frequencies of cut-wire pair","authors":"V. Lam, N. T. Tung, J. W. Park, Y. P. Lee","doi":"10.1109/META.2008.4723571","DOIUrl":"https://doi.org/10.1109/META.2008.4723571","url":null,"abstract":"We studied the influence of structural parameters on the resonance frequencies of cut-wire pair, which are the essential components for designing the left-handed materials. It was found that the structural parameters of cut-wire pair structure provide subtle effects on not only the magnetic resonance but also the electric one. The results are good agreement with the previous theoretical studies. These structures were designed, fabricated, and measured in the microwave frequency regime.","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":"131384990","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}