Coherent optical control of polarization with a critical metasurface
We present a mechanism by which a metamaterial surface, or metasurface, can act as an ideal phase-controlled rotatable linear polarizer. Using coupled-mode theory and the idea of coherent perfect absorption into auxiliary polarization channels, we show how the losses and near-field couplings on the...
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| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/81116 http://hdl.handle.net/10220/39123 |
| _version_ | 1811683428834213888 |
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| author | Kang, Ming Chong, Yi Dong |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Kang, Ming Chong, Yi Dong |
| author_sort | Kang, Ming |
| collection | NTU |
| description | We present a mechanism by which a metamaterial surface, or metasurface, can act as an ideal phase-controlled rotatable linear polarizer. Using coupled-mode theory and the idea of coherent perfect absorption into auxiliary polarization channels, we show how the losses and near-field couplings on the metasurface can be balanced so that, with equal-power linearly polarized beams incident on each side, varying the relative phase rotates the polarization angles of the output beams while maintaining zero ellipticity. The system can be described by a non-Hermitian effective Hamiltonian which is parity-time (PT) symmetric, although there is no actual gain present; perfect polarization conversion occurs at the eigenfrequencies of this Hamiltonian, and the polarization rotating behavior occurs at the critical point of its PT-breaking transition. |
| first_indexed | 2024-10-01T04:12:35Z |
| format | Journal Article |
| id | ntu-10356/81116 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:12:35Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/811162023-02-28T19:28:57Z Coherent optical control of polarization with a critical metasurface Kang, Ming Chong, Yi Dong School of Physical and Mathematical Sciences Photonics We present a mechanism by which a metamaterial surface, or metasurface, can act as an ideal phase-controlled rotatable linear polarizer. Using coupled-mode theory and the idea of coherent perfect absorption into auxiliary polarization channels, we show how the losses and near-field couplings on the metasurface can be balanced so that, with equal-power linearly polarized beams incident on each side, varying the relative phase rotates the polarization angles of the output beams while maintaining zero ellipticity. The system can be described by a non-Hermitian effective Hamiltonian which is parity-time (PT) symmetric, although there is no actual gain present; perfect polarization conversion occurs at the eigenfrequencies of this Hamiltonian, and the polarization rotating behavior occurs at the critical point of its PT-breaking transition. Published version 2015-12-17T04:01:20Z 2019-12-06T14:21:44Z 2015-12-17T04:01:20Z 2019-12-06T14:21:44Z 2015 Journal Article Kang, M., & Chong, Y. D. (2015). Coherent optical control of polarization with a critical metasurface. Physical Review A, 92(4), 043826-. 1050-2947 https://hdl.handle.net/10356/81116 http://hdl.handle.net/10220/39123 10.1103/PhysRevA.92.043826 en Physical Review A © 2015 American Physical Society. This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevA.92.043826]. 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. 7 p. application/pdf |
| spellingShingle | Photonics Kang, Ming Chong, Yi Dong Coherent optical control of polarization with a critical metasurface |
| title | Coherent optical control of polarization with a critical metasurface |
| title_full | Coherent optical control of polarization with a critical metasurface |
| title_fullStr | Coherent optical control of polarization with a critical metasurface |
| title_full_unstemmed | Coherent optical control of polarization with a critical metasurface |
| title_short | Coherent optical control of polarization with a critical metasurface |
| title_sort | coherent optical control of polarization with a critical metasurface |
| topic | Photonics |
| url | https://hdl.handle.net/10356/81116 http://hdl.handle.net/10220/39123 |
| work_keys_str_mv | AT kangming coherentopticalcontrolofpolarizationwithacriticalmetasurface AT chongyidong coherentopticalcontrolofpolarizationwithacriticalmetasurface |