Dual-Band Topological Valley Cavity in Mid-Infrared Range
Topological edge states, emerging at boundaries between regions with distinct topological properties, enable unidirectional transmission with robustness against defects and disorder. However, achieving dual-band operation with high performance remains challenging. Here, we integrate dual-band topolo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/5/420 |
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| author | Chen Kang Jinling Yu Can Chen Yunfeng Lai Shuying Cheng Yonghai Chen Yuan Li Shuman Liu Jinchuan Zhang Fengqi Liu |
| author_facet | Chen Kang Jinling Yu Can Chen Yunfeng Lai Shuying Cheng Yonghai Chen Yuan Li Shuman Liu Jinchuan Zhang Fengqi Liu |
| author_sort | Chen Kang |
| collection | DOAJ |
| description | Topological edge states, emerging at boundaries between regions with distinct topological properties, enable unidirectional transmission with robustness against defects and disorder. However, achieving dual-band operation with high performance remains challenging. Here, we integrate dual-band topological edge states into a valley photonic crystal cavity operating in the mid-infrared region, leveraging triangular scatterers. A key contribution of this work is the simultaneous realization of ultra-high Q-factors (up to 6.1593 × 10<sup>9</sup>) and uniform mode distribution (inverse participation ratio < 2) across both bands. Moreover, the dual-band cavity exhibits exceptional defect tolerance. These findings provide a promising platform for mid-infrared photonic integration, paving the way for high-performance optical cavities in multifunctional photonic systems. |
| format | Article |
| id | doaj-art-96588dd48e594695a5b2dc57ade7f873 |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-96588dd48e594695a5b2dc57ade7f8732025-08-20T03:48:02ZengMDPI AGPhotonics2304-67322025-04-0112542010.3390/photonics12050420Dual-Band Topological Valley Cavity in Mid-Infrared RangeChen Kang0Jinling Yu1Can Chen2Yunfeng Lai3Shuying Cheng4Yonghai Chen5Yuan Li6Shuman Liu7Jinchuan Zhang8Fengqi Liu9School of Advanced Manufacturing, Fuzhou University, Quanzhou 362251, ChinaSchool of Advanced Manufacturing, Fuzhou University, Quanzhou 362251, ChinaSchool of Advanced Manufacturing, Fuzhou University, Quanzhou 362251, ChinaInstitute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaInstitute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaLaboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaLaboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaLaboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaLaboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaLaboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaTopological edge states, emerging at boundaries between regions with distinct topological properties, enable unidirectional transmission with robustness against defects and disorder. However, achieving dual-band operation with high performance remains challenging. Here, we integrate dual-band topological edge states into a valley photonic crystal cavity operating in the mid-infrared region, leveraging triangular scatterers. A key contribution of this work is the simultaneous realization of ultra-high Q-factors (up to 6.1593 × 10<sup>9</sup>) and uniform mode distribution (inverse participation ratio < 2) across both bands. Moreover, the dual-band cavity exhibits exceptional defect tolerance. These findings provide a promising platform for mid-infrared photonic integration, paving the way for high-performance optical cavities in multifunctional photonic systems.https://www.mdpi.com/2304-6732/12/5/420valley photonic crystalsmid-infrared rangetopological |
| spellingShingle | Chen Kang Jinling Yu Can Chen Yunfeng Lai Shuying Cheng Yonghai Chen Yuan Li Shuman Liu Jinchuan Zhang Fengqi Liu Dual-Band Topological Valley Cavity in Mid-Infrared Range Photonics valley photonic crystals mid-infrared range topological |
| title | Dual-Band Topological Valley Cavity in Mid-Infrared Range |
| title_full | Dual-Band Topological Valley Cavity in Mid-Infrared Range |
| title_fullStr | Dual-Band Topological Valley Cavity in Mid-Infrared Range |
| title_full_unstemmed | Dual-Band Topological Valley Cavity in Mid-Infrared Range |
| title_short | Dual-Band Topological Valley Cavity in Mid-Infrared Range |
| title_sort | dual band topological valley cavity in mid infrared range |
| topic | valley photonic crystals mid-infrared range topological |
| url | https://www.mdpi.com/2304-6732/12/5/420 |
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