Broadband Ground-Plane Cloak Export

@article{citeulike:3889909, abstract = {The possibility of cloaking an object from detection by electromagnetic waves has recently become a topic of considerable interest. The design of a cloak uses transformation optics, in which a conformal coordinate transformation is applied to Maxwell's equations to obtain a spatially distributed set of constitutive parameters that define the cloak. Here, we present an experimental realization of a cloak design that conceals a perturbation on a flat conducting plane, under which an object can be hidden. To match the complex spatial distribution of the required constitutive parameters, we constructed a metamaterial consisting of thousands of elements, the geometry of each element determined by an automated design process. The ground-plane cloak can be realized with the use of nonresonant metamaterial elements, resulting in a structure having a broad operational bandwidth (covering the range of 13 to 16 gigahertz in our experiment) and exhibiting extremely low loss. Our experimental results indicate that this type of cloak should scale well toward optical wavelengths. 10.1126/science.1166949}, author = {Liu, R. and Ji, C. and Mock, J. J. and Chin, J. Y. and Cui, T. J. and Smith, D. R.}, citeulike-article-id = {3889909}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1166949}, citeulike-linkout-1 = {http://www.sciencemag.org/cgi/content/abstract/323/5912/366}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/19150842}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=19150842}, day = {16}, doi = {10.1126/science.1166949}, journal = {Science}, keywords = {carpet, cloaking, experimental}, month = {January}, number = {5912}, pages = {366--369}, posted-at = {2009-02-02 19:25:12}, priority = {2}, title = {Broadband Ground-Plane Cloak}, url = {http://dx.doi.org/10.1126/science.1166949}, volume = {323}, year = {2009} }

TY - JOUR ID - citeulike:3889909 L3 - citeulike-article-id:3889909 N2 - The possibility of cloaking an object from detection by electromagnetic waves has recently become a topic of considerable interest. The design of a cloak uses transformation optics, in which a conformal coordinate transformation is applied to Maxwell's equations to obtain a spatially distributed set of constitutive parameters that define the cloak. Here, we present an experimental realization of a cloak design that conceals a perturbation on a flat conducting plane, under which an object can be hidden. To match the complex spatial distribution of the required constitutive parameters, we constructed a metamaterial consisting of thousands of elements, the geometry of each element determined by an automated design process. The ground-plane cloak can be realized with the use of nonresonant metamaterial elements, resulting in a structure having a broad operational bandwidth (covering the range of 13 to 16 gigahertz in our experiment) and exhibiting extremely low loss. Our experimental results indicate that this type of cloak should scale well toward optical wavelengths. 10.1126/science.1166949 IS - 5912 JF - Science EP - 369 TI - Broadband Ground-Plane Cloak VL - 323 SP - 366 KW - carpet KW - cloaking KW - experimental AU - Liu, R AU - Ji, C AU - Mock, JJ AU - Chin, JY AU - Cui, TJ AU - Smith, DR PY - 2009/01/16/ UR - http://dx.doi.org/10.1126/science.1166949 ER -