Limitations of high-order transformation and incident angle on simplified invisibility cloaks
We studied the scattering from the simplified cylindrical cloaks analytically at both normal and oblique incidences. We found that these simplified cylindrical cloaks may produce a larger scattering at nonnormal incidences than that from an object without any cloak, making this object more “visible”...
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| Format: | Journal Article |
| Language: | English |
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2012
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| Online Access: | https://hdl.handle.net/10356/95035 http://hdl.handle.net/10220/8809 |
| _version_ | 1826120055006429184 |
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| author | Zhang, Baile Chen, Hongsheng Wu, Bae-Ian |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhang, Baile Chen, Hongsheng Wu, Bae-Ian |
| author_sort | Zhang, Baile |
| collection | NTU |
| description | We studied the scattering from the simplified cylindrical cloaks analytically at both normal and oblique incidences. We found that these simplified cylindrical cloaks may produce a larger scattering at nonnormal incidences than that from an object without any cloak, making this object more “visible”. Even at normal incidence, the high-order transformation with impedance matched at the outer boundary can produce stronger scattering than the linear simplified one without matched impedance. This is due to the inefficiency of guided waves close to the inner boundary. Therefore, a square root transformation can improve scattering by guiding waves away from the inner boundary. |
| first_indexed | 2024-10-01T05:09:56Z |
| format | Journal Article |
| id | ntu-10356/95035 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:09:56Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/950352023-02-28T19:38:47Z Limitations of high-order transformation and incident angle on simplified invisibility cloaks Zhang, Baile Chen, Hongsheng Wu, Bae-Ian School of Physical and Mathematical Sciences DRNTU::Science::Mathematics We studied the scattering from the simplified cylindrical cloaks analytically at both normal and oblique incidences. We found that these simplified cylindrical cloaks may produce a larger scattering at nonnormal incidences than that from an object without any cloak, making this object more “visible”. Even at normal incidence, the high-order transformation with impedance matched at the outer boundary can produce stronger scattering than the linear simplified one without matched impedance. This is due to the inefficiency of guided waves close to the inner boundary. Therefore, a square root transformation can improve scattering by guiding waves away from the inner boundary. Published version 2012-10-29T02:50:14Z 2019-12-06T19:06:58Z 2012-10-29T02:50:14Z 2019-12-06T19:06:58Z 2008 2008 Journal Article Zhang, B., Chen, H., & Wu, B. I. (2008). Limitations of high-order transformation and incident angle on simplified invisibility cloaks. Optics Express, 16(19), 14655-14660. 1094-4087 https://hdl.handle.net/10356/95035 http://hdl.handle.net/10220/8809 10.1364/OE.16.014655 en Optics express © 2008 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/OE.16.014655]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Mathematics Zhang, Baile Chen, Hongsheng Wu, Bae-Ian Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title | Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title_full | Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title_fullStr | Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title_full_unstemmed | Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title_short | Limitations of high-order transformation and incident angle on simplified invisibility cloaks |
| title_sort | limitations of high order transformation and incident angle on simplified invisibility cloaks |
| topic | DRNTU::Science::Mathematics |
| url | https://hdl.handle.net/10356/95035 http://hdl.handle.net/10220/8809 |
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