Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals
This paper introduces a four-band tunable perfect absorber built on Al-Cu-Fe quasicrystal. The operating frequency range is 4.75 THz to 9.25 THz, which is in the terahertz band. The absorber exhibits multiple narrow bands, polarization incoherence, high sensitivity, and tunability. The structure com...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379724002936 |
| _version_ | 1797213358734180352 |
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| author | Guolun Cheng Wenxin Li Bo Sun Yuying Ying Wenxing Yang |
| author_facet | Guolun Cheng Wenxin Li Bo Sun Yuying Ying Wenxing Yang |
| author_sort | Guolun Cheng |
| collection | DOAJ |
| description | This paper introduces a four-band tunable perfect absorber built on Al-Cu-Fe quasicrystal. The operating frequency range is 4.75 THz to 9.25 THz, which is in the terahertz band. The absorber exhibits multiple narrow bands, polarization incoherence, high sensitivity, and tunability. The structure comprises a gold layer, a silica dielectric layer, and a top layer of Al-Cu-Fe quasicrystal from bottom to top. The Al-Cu-Fe quasicrystal structure at the top consists of a circular ring left after being cut by a 45° rotation of the cruciform and a cruciform design containing a central circular cavity. Simulation results reveal four absorption peaks attributed to cavity resonance and surface plasmon resonance, with absorption efficiencies of 0.998, 0.994, 0.989, and 0.998, respectively. Furthermore, changing the radius of the inner ring in the top layer structure allows for varying the number of absorption peaks. We also propose a new fabrication process for Al-Cu-Fe quasicrystals absorbers. The calculated results demonstrate that the designed absorber, characterized by a simple structure and high sensitivity of 2620 GHz/RIU, holds significant potential for applications in optical switches, optical modulators, biomedicine, and sensing. |
| first_indexed | 2024-04-24T10:57:01Z |
| format | Article |
| id | doaj.art-06c61a57ac5242b2ac71d3d3bdddf117 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-24T10:57:01Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-06c61a57ac5242b2ac71d3d3bdddf1172024-04-12T04:45:18ZengElsevierResults in Physics2211-37972024-04-0159107610Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystalsGuolun Cheng0Wenxin Li1Bo Sun2Yuying Ying3Wenxing Yang4School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, PR ChinaSchool of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, PR ChinaCorresponding authors.; School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, PR ChinaCorresponding authors.; School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, PR ChinaCorresponding authors.; School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, PR ChinaThis paper introduces a four-band tunable perfect absorber built on Al-Cu-Fe quasicrystal. The operating frequency range is 4.75 THz to 9.25 THz, which is in the terahertz band. The absorber exhibits multiple narrow bands, polarization incoherence, high sensitivity, and tunability. The structure comprises a gold layer, a silica dielectric layer, and a top layer of Al-Cu-Fe quasicrystal from bottom to top. The Al-Cu-Fe quasicrystal structure at the top consists of a circular ring left after being cut by a 45° rotation of the cruciform and a cruciform design containing a central circular cavity. Simulation results reveal four absorption peaks attributed to cavity resonance and surface plasmon resonance, with absorption efficiencies of 0.998, 0.994, 0.989, and 0.998, respectively. Furthermore, changing the radius of the inner ring in the top layer structure allows for varying the number of absorption peaks. We also propose a new fabrication process for Al-Cu-Fe quasicrystals absorbers. The calculated results demonstrate that the designed absorber, characterized by a simple structure and high sensitivity of 2620 GHz/RIU, holds significant potential for applications in optical switches, optical modulators, biomedicine, and sensing.http://www.sciencedirect.com/science/article/pii/S2211379724002936Dirac semimetalPerfect absorberTerahertzAl-Cu-Fe quasicrystal |
| spellingShingle | Guolun Cheng Wenxin Li Bo Sun Yuying Ying Wenxing Yang Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals Results in Physics Dirac semimetal Perfect absorber Terahertz Al-Cu-Fe quasicrystal |
| title | Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals |
| title_full | Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals |
| title_fullStr | Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals |
| title_full_unstemmed | Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals |
| title_short | Four-band highly sensitive tunable absorber based on Al-Cu-Fe quasicrystals |
| title_sort | four band highly sensitive tunable absorber based on al cu fe quasicrystals |
| topic | Dirac semimetal Perfect absorber Terahertz Al-Cu-Fe quasicrystal |
| url | http://www.sciencedirect.com/science/article/pii/S2211379724002936 |
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