A. Radkovskaya, L. Li, E. Edwards, D. Edwards, E. Shamonina, L. Solymar
{"title":"Near-field superdirectivity for coupled dimers of meta-atoms","authors":"A. Radkovskaya, L. Li, E. Edwards, D. Edwards, E. Shamonina, L. Solymar","doi":"10.1109/METAMATERIALS.2014.6948672","DOIUrl":null,"url":null,"abstract":"We present new results relating far-field and near-field superdirectivity for a dimer endfire array in which only one of the meta-atoms is excited. We deduce conditions for achieving superdirectivity in terms of structure parameters (distances between meta-atoms, their quality factors and the values of mutual coupling) and show that the required sets of parameters are different for far-field and near-field superdirectivity. Our results are relevant to medical imaging applications such as MRI and associated technologies.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/METAMATERIALS.2014.6948672","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
We present new results relating far-field and near-field superdirectivity for a dimer endfire array in which only one of the meta-atoms is excited. We deduce conditions for achieving superdirectivity in terms of structure parameters (distances between meta-atoms, their quality factors and the values of mutual coupling) and show that the required sets of parameters are different for far-field and near-field superdirectivity. Our results are relevant to medical imaging applications such as MRI and associated technologies.