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2008 International Workshop on Metamaterials最新文献

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Photonic crystal units for pixel array display 用于像素阵列显示的光子晶体单元
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723562
Cheng Sun, Z. Gu
{"title":"Photonic crystal units for pixel array display","authors":"Cheng Sun, Z. Gu","doi":"10.1109/META.2008.4723562","DOIUrl":"https://doi.org/10.1109/META.2008.4723562","url":null,"abstract":"Photonic crystal, with two or three dimensionally ordered lattices that can control the propagation of light in the manner in which atomic crystals control electrons, has received great attention in recent years. The reflecting optics based on photonic crystal is demonstrated to be promising in such terminal unit of flexible screen as photonic ink, electronic paper and mobile telephone due to its unique optical properties of fadeless color and controllable brightness. Self-assembly of monodisperse nanospheres is a simple and effective approach to creating three-dimensional opaline or inverse opaline photonic crystals (colloidal crystal) in which ordered monodisperse solid or air spheres throughout the network contribute to the optical stop band. When the optical stop band falls into the visible region, a colloidal crystal turns out to be brilliantly colorific.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"56 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":"130756817","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
Investigations of metamaterials for microwave frequency in time-domain 微波频率超材料的时域研究
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723522
Yewen Zhang, Hong Chen
{"title":"Investigations of metamaterials for microwave frequency in time-domain","authors":"Yewen Zhang, Hong Chen","doi":"10.1109/META.2008.4723522","DOIUrl":"https://doi.org/10.1109/META.2008.4723522","url":null,"abstract":"Summary form only given. Metamaterials, specially, metamaterials for microwave by composite right-left-handed transmission line (CRLH-TL), are studied frequency in frequency-domain. For example, it was studied by transmission-reflection characteristics from S-parameter. But it is difficult to know clearly the relationship of phases, of group velocity, of phase velocity, and the wave propagation process. In this paper, the investigations of metamaterials for microwave in time-domain are presented: 1. The experimental set-up and the experimental method are presented for the microstrip transmission line protocol. For a simple CRLH-TL, it shows directly that the phase velocity is toward the source and is consequently antiparallel to the group velocity. 2. For the electric beam controlled CRLH-TL leaky wave antenna, it shows clear that there are two left-handed frequency ranges, but only one range can be used for electric beam controlled radiation. 3. For the asymmetric RH-CRLH coupler, which composed of a conventional right-handed (RH) transmission line and a CRLH transmission, the time-domain experimental results show that the phase velocities of the two lines to be equal and move toward the same direction. A vortex-like interface mode exists at the interface of a RH-CRLH coupler and the vortex-like interface mode can lead to slow propagation from the CRLH TL across the interface to the RH TL. 4. For the ENG/MNG pairs, the experiments in time-domain can show clear the distribution of evanescent wave in ENG/MNG pairs by transmission line, and the phase relationship between the input and output of the pair while the tunneling occurs. 5. For the photonic crystal transmission line, the experimental results can show the dispersive relation directly, and show there is no any left-handed transmission relationship. 6. For the coupler composed of CRLH-TL and PC-TL, the time-domain experiments show that it is similar to the coupler composed CRLH-TL and normal transmission line.","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":"130877480","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
Light trapper by tapered air core in anisotropic metamaterial 各向异性超材料中锥形空气芯捕光器
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723615
T. Jiang, Junming Zhao, Yijun Feng
{"title":"Light trapper by tapered air core in anisotropic metamaterial","authors":"T. Jiang, Junming Zhao, Yijun Feng","doi":"10.1109/META.2008.4723615","DOIUrl":"https://doi.org/10.1109/META.2008.4723615","url":null,"abstract":"We present a detailed study of oscillating modes in a slab waveguide with air core and anisotropic metamaterial cladding. It is shown that, under specific dielectric configurations, slow and even stopped electromagnetic wave can be supported by such an air waveguide. We propose a linearly tapped waveguide structure that could lead the propagating light to a complete standstill. Both the theoretical analysis and the proposed waveguide have been validated by full-wave simulation based on finite-difference time-domain method.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"24 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":"127961537","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
Geometrical optics for inhomogeneous anisotropic medium: Application to a negative-graded index-of-refraction lens with an anisotropic material 非均匀各向异性介质的几何光学:各向异性材料负梯度折射率透镜的应用
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723597
Y. Zhai, T. Cui, Y. Yin
{"title":"Geometrical optics for inhomogeneous anisotropic medium: Application to a negative-graded index-of-refraction lens with an anisotropic material","authors":"Y. Zhai, T. Cui, Y. Yin","doi":"10.1109/META.2008.4723597","DOIUrl":"https://doi.org/10.1109/META.2008.4723597","url":null,"abstract":"In this paper, the method of geometric optics is applied to investigate wave propagation in a negative-graded refractive index lens with an anisotropic medium based on a presented modified eikonal equation valid for the most general form of an anisotropic or chiral medium. The far fields are obtained by means of the computed geometric optics field on the surface of the lens. The method is easily degenerated to the case of the isotropic medium and the computed far fields are compared with the 3-D fields simulation tools CST. The results show that good far field approximation can be obtained from the geometric optics field, especially within main lobe.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"23 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":"126659151","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
Characterization and application of planar terahertz narrow bandpass filter with metamaterial resonators 平面超材料谐振腔太赫兹窄带通滤波器的特性与应用
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723612
Li-Ming Si, Yong-xia Yuan, Houjun Sun, X. Lv
{"title":"Characterization and application of planar terahertz narrow bandpass filter with metamaterial resonators","authors":"Li-Ming Si, Yong-xia Yuan, Houjun Sun, X. Lv","doi":"10.1109/META.2008.4723612","DOIUrl":"https://doi.org/10.1109/META.2008.4723612","url":null,"abstract":"A planar terahertz (THz) narrow bandpass filter for the sensing of small amounts of overlaid dielectrics is presented. A two-dimensional (2D) periodic array of four sub-wavelength rectangular split-ring resonators (SRRs) is developed on a benzocyclobutene (BCB) substrate to realize the novel compact, low insertion-loss, and narrow bandpass microstrip filter with the center frequency of 1 THz and 3-dB bandwidth of 6.2 GHz. Due to center frequency shifts occurs with the change of equivalent permittivities at the surface of the filter when it covered by dielectrics of different permittivity and thickness, this narrow bandpass filter is especially suitable for detecting the properties of overlaid dielectrics.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"136 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":"122797884","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: 20
Electromagnetic interactions between fast electron beam and a metamaterial cloak 快速电子束与超材料斗篷之间的电磁相互作用
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723557
Jinying Xu, Yunxia Dong, Xiangdong Zhang
{"title":"Electromagnetic interactions between fast electron beam and a metamaterial cloak","authors":"Jinying Xu, Yunxia Dong, Xiangdong Zhang","doi":"10.1109/META.2008.4723557","DOIUrl":"https://doi.org/10.1109/META.2008.4723557","url":null,"abstract":"Relativistic energy loss and photon emission in the interaction of ideal and nonideal metamaterial cloaks with an external electron beam are studied based on the classical electrodynamics. The effects of various imperfect parameters on the efficiency of the cloak are emphasized. The energy-loss spectra and the photon emission for such structures with the different combinations of electron velocity and impact parameter are calculated. It is shown that the efficiency of nonideal electromagnetic cloaks and the effect of various nonideal parameters on the cloak invisibility can be exhibited in the electron energy loss spectroscopy. This means that the properties of cloak can be explored by scanning transmission electron microscopy.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"120 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":"128045717","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
Coupled-line directional coupler based on Composite Right / Left-Handed coplanar waveguides 基于复合左右共面波导的耦合线定向耦合器
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723601
Qiaoli Zhang, S.N. Khan, Sailing He
{"title":"Coupled-line directional coupler based on Composite Right / Left-Handed coplanar waveguides","authors":"Qiaoli Zhang, S.N. Khan, Sailing He","doi":"10.1109/META.2008.4723601","DOIUrl":"https://doi.org/10.1109/META.2008.4723601","url":null,"abstract":"A broadside coupled (BSC) coupled-line directional coupler based on Composite Right/Left-Handed (CRLH) Coplanar Waveguide (CPW) is proposed. The CRLH CPW on both sides of the substrate comprises of series gap capacitor, broadside-coupled capacitor, and shunt meandering short-circuited stub inductor symmetrically. The new CRLH CPW coupler exhibits a quasi-0-dB coupling over a very wide bandwidth of 89.4% from 6.45 ~ 13.6 GHz centered at 8 GHz. It is also very compact and symmetrical compared with the conventional designs. An equivalent circuit model including series inductance, capacitance and shunt inductance and capacitance tank also has been established. Good agreement between the full-wave simulation and equivalent circuit model has been achieved and verified the effectiveness of the proposed circuit model.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"99 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":"134216053","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
Full-wave analysis of conical cloaking structures 锥形隐形结构的全波分析
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723550
Yu Luo, Jingjing Zhang, Hongsheng Chen
{"title":"Full-wave analysis of conical cloaking structures","authors":"Yu Luo, Jingjing Zhang, Hongsheng Chen","doi":"10.1109/META.2008.4723550","DOIUrl":"https://doi.org/10.1109/META.2008.4723550","url":null,"abstract":"Concealing an object by only covering an open space can be realized with a conical cloak. It is shown that we can not only use a conical cloak to guide the electromagnetic (EM) wave totally around an open region without introducing any scattered field, but also design one which produces the reflection exactly the same as that caused by a dielectric half space, in addition, it is demonstrated that introducing a little loss can significantly reduce the electric field distributed at the infinite side of the conical cloak, which indicate the possibility of truncating the conical cloak in axial direction and opens a path to its physical realization. Our approach provides a practical way to achieve invisibility, especially in the case where there are two half spaces composed of different media.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"19 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":"126286126","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 broadband microstrip patch antenna based on the spiral composite right/left-handed transmission line 基于螺旋复合左右传输线的新型宽带微带贴片天线
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723613
Duan Zhang-shan, Qu Shao-bo, Hou Yi-wei
{"title":"A novel broadband microstrip patch antenna based on the spiral composite right/left-handed transmission line","authors":"Duan Zhang-shan, Qu Shao-bo, Hou Yi-wei","doi":"10.1109/META.2008.4723613","DOIUrl":"https://doi.org/10.1109/META.2008.4723613","url":null,"abstract":"A novel metamaterial-based spiral transmission line structure is presents and demonstrated as a single-layer single-patch microstrip patch antenna excited by microstrip line feed with broadband up to 8% and weak direction. This structure is in essence a spiral composite right/left hand (CRLH) transmission line (TL) incorporating circle microstrip patch for the multi-staggered resonance frequencies of patch antenna controlled operation, by which the broadband of the microstrip patch antenna is achieved.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"75 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":"131110340","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
Highly efficient and tunable microlasers on photonic crystal slab 光子晶体板上的高效可调谐微激光器
2008 International Workshop on Metamaterials Pub Date : 2008-12-22 DOI: 10.1109/META.2008.4723530
Wanhua Zheng
{"title":"Highly efficient and tunable microlasers on photonic crystal slab","authors":"Wanhua Zheng","doi":"10.1109/META.2008.4723530","DOIUrl":"https://doi.org/10.1109/META.2008.4723530","url":null,"abstract":"Summary form only given. Photonic crystal (PC) is acknowledged as an enabling science and technology of the manipulating photons in the size of micrometers. The research in PC integrated circuits is driven by the advantages seen in the variety of 2D PC slab devices, such as the ultrasmall cavity laser, ultra-low loss sharp bend waveguide, high performance and small sized beam splitters and so on. Analogous to electronic integrated circuits, integrating photonic functions on a PC chip allows the realization of cheaper and more compact optical systems with higher performance. As one of the key components, PC edge-emitting microcavity laser attracts many interests. In the experiment, the MOCVD-grown InGaAsP/InP wafer including seven 9-nm thick QWs whose gain peak was at 1.538 mum was employed. The device was fabricated by typical nanofabrication processing. Optical pumped lasers shows high out efficiency over 20%, and single modes with a large side mode suppression of 37 dB. The microcavity shows tunable lasing characteristics depending on the selective mode pumping. We believe that this is a promising result for large scale active photonic integration in the PCs.","PeriodicalId":345360,"journal":{"name":"2008 International Workshop on Metamaterials","volume":"306 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":"115858786","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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