Experimental verification of free-space singular boundary conditions in an invisibility cloak
A major issue in invisibility cloaking, which caused intense mathematical discussions in the past few years but still remains physically elusive, is the plausible singular boundary conditions associated with the singular metamaterials at the inner boundary of an invisibility cloak. The perfect cloak...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Online Access: | https://hdl.handle.net/10356/84534 http://hdl.handle.net/10220/43594 |
| _version_ | 1811686579100450816 |
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| author | Wu, Qiannan Gao, Fei Song, Zhengyong Lin, Xiao Zhang, Youming Chen, Huanyang Zhang, Baile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wu, Qiannan Gao, Fei Song, Zhengyong Lin, Xiao Zhang, Youming Chen, Huanyang Zhang, Baile |
| author_sort | Wu, Qiannan |
| collection | NTU |
| description | A major issue in invisibility cloaking, which caused intense mathematical discussions in the past few years but still remains physically elusive, is the plausible singular boundary conditions associated with the singular metamaterials at the inner boundary of an invisibility cloak. The perfect cloaking phenomenon, as originally proposed by Pendry et al for electromagnetic waves, cannot be treated as physical before a realistic inner boundary of a cloak is demonstrated. Although a recent demonstration has been done in a waveguide environment, the exotic singular boundary conditions should apply to a general environment as in free space. Here we fabricate a metamaterial surface that exhibits the singular boundary conditions and demonstrate its performance in free space. Particularly, the phase information of waves reflected from this metamaterial surface is explicitly measured, confirming the singular responses of boundary conditions for an invisibility cloak. |
| first_indexed | 2024-10-01T05:02:39Z |
| format | Journal Article |
| id | ntu-10356/84534 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:02:39Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/845342023-02-28T19:33:20Z Experimental verification of free-space singular boundary conditions in an invisibility cloak Wu, Qiannan Gao, Fei Song, Zhengyong Lin, Xiao Zhang, Youming Chen, Huanyang Zhang, Baile School of Physical and Mathematical Sciences Invisibility Cloaking Boundary Condition A major issue in invisibility cloaking, which caused intense mathematical discussions in the past few years but still remains physically elusive, is the plausible singular boundary conditions associated with the singular metamaterials at the inner boundary of an invisibility cloak. The perfect cloaking phenomenon, as originally proposed by Pendry et al for electromagnetic waves, cannot be treated as physical before a realistic inner boundary of a cloak is demonstrated. Although a recent demonstration has been done in a waveguide environment, the exotic singular boundary conditions should apply to a general environment as in free space. Here we fabricate a metamaterial surface that exhibits the singular boundary conditions and demonstrate its performance in free space. Particularly, the phase information of waves reflected from this metamaterial surface is explicitly measured, confirming the singular responses of boundary conditions for an invisibility cloak. MOE (Min. of Education, S’pore) Accepted version 2017-08-16T08:15:49Z 2019-12-06T15:46:43Z 2017-08-16T08:15:49Z 2019-12-06T15:46:43Z 2016 Journal Article Wu, Q., Gao, F., Song, Z., Lin, X., Zhang, Y., Chen, H., et al. (2016). Experimental verification of free-space singular boundary conditions in an invisibility cloak. Journal of Optics, 18(4), 044008-. 2040-8978 https://hdl.handle.net/10356/84534 http://hdl.handle.net/10220/43594 10.1088/2040-8978/18/4/044008 en Journal of Optics © 2016 IOP Publishing Ltd (Institute of Physics). This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Optics, IOP Publishing Ltd (Institute of Physics). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/2040-8978/18/4/044008]. 8 p. application/pdf |
| spellingShingle | Invisibility Cloaking Boundary Condition Wu, Qiannan Gao, Fei Song, Zhengyong Lin, Xiao Zhang, Youming Chen, Huanyang Zhang, Baile Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title | Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title_full | Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title_fullStr | Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title_full_unstemmed | Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title_short | Experimental verification of free-space singular boundary conditions in an invisibility cloak |
| title_sort | experimental verification of free space singular boundary conditions in an invisibility cloak |
| topic | Invisibility Cloaking Boundary Condition |
| url | https://hdl.handle.net/10356/84534 http://hdl.handle.net/10220/43594 |
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