Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure
In the field of modern optical communication systems and photoelectric detection, new components with complex functions and excellent performance are urgently needed. In this paper, a graphene-based parity–time (PT) symmetry structure is proposed, which is achieved by preparing the graphene layer on...
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MDPI AG
2021-12-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/12/1513 |
| _version_ | 1797505713083252736 |
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| author | Lingjun Yi Changhong Li |
| author_facet | Lingjun Yi Changhong Li |
| author_sort | Lingjun Yi |
| collection | DOAJ |
| description | In the field of modern optical communication systems and photoelectric detection, new components with complex functions and excellent performance are urgently needed. In this paper, a graphene-based parity–time (PT) symmetry structure is proposed, which is achieved by preparing the graphene layer on the top of a PT-symmetry photonic crystal. The transfer matrix method was used to calculate the absorptance of graphene, and a unique amplified absorption effect was found. Meanwhile, the peak value and wavelength position of the absorption can be modulated via the applied electric field. The results show that by adjusting the negative square-wave electric field from −3.5 × 10<sup>−5</sup> to −13.5 × 10<sup>−5</sup> V/nm (or the positive square-wave electric field from 2 × 10<sup>−5</sup> to 11 × 10<sup>−5</sup> V/nm), the proposed structure can achieve in-phase (or out-phase) enhanced absorption for the communication wavelength 1550 nm, with the absorption of graphene from 17 to 28 dB (or 30 to 15 dB) corresponding to the square-wave modulation electric field change. The modulable absorption properties of graphene in the structure have potential in optoelectronic devices and optical communication systems. |
| first_indexed | 2024-03-10T04:22:19Z |
| format | Article |
| id | doaj.art-d1cb571757464195996cc5afe95de613 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T04:22:19Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj.art-d1cb571757464195996cc5afe95de6132023-11-23T07:48:46ZengMDPI AGCrystals2073-43522021-12-011112151310.3390/cryst11121513Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal StructureLingjun Yi0Changhong Li1School of Electronic Information, Qingdao University, Qingdao 266071, ChinaSchool of Electronic Information, Qingdao University, Qingdao 266071, ChinaIn the field of modern optical communication systems and photoelectric detection, new components with complex functions and excellent performance are urgently needed. In this paper, a graphene-based parity–time (PT) symmetry structure is proposed, which is achieved by preparing the graphene layer on the top of a PT-symmetry photonic crystal. The transfer matrix method was used to calculate the absorptance of graphene, and a unique amplified absorption effect was found. Meanwhile, the peak value and wavelength position of the absorption can be modulated via the applied electric field. The results show that by adjusting the negative square-wave electric field from −3.5 × 10<sup>−5</sup> to −13.5 × 10<sup>−5</sup> V/nm (or the positive square-wave electric field from 2 × 10<sup>−5</sup> to 11 × 10<sup>−5</sup> V/nm), the proposed structure can achieve in-phase (or out-phase) enhanced absorption for the communication wavelength 1550 nm, with the absorption of graphene from 17 to 28 dB (or 30 to 15 dB) corresponding to the square-wave modulation electric field change. The modulable absorption properties of graphene in the structure have potential in optoelectronic devices and optical communication systems.https://www.mdpi.com/2073-4352/11/12/1513optical devicegrapheneelectrical modulationparity–time symmetryenhanced absorption |
| spellingShingle | Lingjun Yi Changhong Li Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure Crystals optical device graphene electrical modulation parity–time symmetry enhanced absorption |
| title | Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure |
| title_full | Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure |
| title_fullStr | Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure |
| title_full_unstemmed | Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure |
| title_short | Simulation Study of In-Phase and Out-Phase Enhanced Absorption of Graphene Based on Parity–Time Symmetry One-Dimensional Photonic Crystal Structure |
| title_sort | simulation study of in phase and out phase enhanced absorption of graphene based on parity time symmetry one dimensional photonic crystal structure |
| topic | optical device graphene electrical modulation parity–time symmetry enhanced absorption |
| url | https://www.mdpi.com/2073-4352/11/12/1513 |
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