Topological edge state assisted dynamically tunable microwave propagations in photonic crystals
Topological photonics has emerged as a cutting-edge and intriguing field that permits electromagnetic waves to transmit with minimal losses even when they come in contact with sharp turns or imperfections or defects. In this study, we validate a strategy to realize dynamically amplitude tunable ligh...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/acf519 |
| _version_ | 1797688594616287232 |
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| author | Sambhu Jana Koijam Monika Devi Gopal Kulkarni Soumyajyoti Mallick Dibakar Roy Chowdhury |
| author_facet | Sambhu Jana Koijam Monika Devi Gopal Kulkarni Soumyajyoti Mallick Dibakar Roy Chowdhury |
| author_sort | Sambhu Jana |
| collection | DOAJ |
| description | Topological photonics has emerged as a cutting-edge and intriguing field that permits electromagnetic waves to transmit with minimal losses even when they come in contact with sharp turns or imperfections or defects. In this study, we validate a strategy to realize dynamically amplitude tunable light propagation in a topological waveguide based on a three-dimensional printed valley Hall photonic crystal structure operating in the microwave frequency region. Here, tunable light propagation is facilitated by inserting an active defect in the form of a semiconductor (silicon) material slab across the domain boundary of the topological waveguide. In this configuration, dynamic variation of transmission amplitude is realized via photoexcitation of the semiconductor defect using an external laser of wavelength, $\lambda \,\sim \,510{ }$ nm. This results in active amplitude tunability of $ \sim \, - 10{ }$ dB in topological wave propagation under a photoexcitation of 100 mW. Our demonstrated route can lead to the design of dynamically controlled topological photonic devices such as optical modulators, switches, optical buffers, etc which are important for the development of 6G communication systems. |
| first_indexed | 2024-03-12T01:34:05Z |
| format | Article |
| id | doaj.art-48ef45378112490f8b6203fbc3163faa |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T01:34:05Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-48ef45378112490f8b6203fbc3163faa2023-09-11T11:36:12ZengIOP PublishingNew Journal of Physics1367-26302023-01-0125909302310.1088/1367-2630/acf519Topological edge state assisted dynamically tunable microwave propagations in photonic crystalsSambhu Jana0Koijam Monika Devi1Gopal Kulkarni2Soumyajyoti Mallick3Dibakar Roy Chowdhury4https://orcid.org/0000-0002-2129-0807Ecole Centrale School of Engineering, Mahindra University , Jeedimetla, Telangana 500043, IndiaEcole Centrale School of Engineering, Mahindra University , Jeedimetla, Telangana 500043, IndiaEcole Centrale School of Engineering, Mahindra University , Jeedimetla, Telangana 500043, IndiaEcole Centrale School of Engineering, Mahindra University , Jeedimetla, Telangana 500043, IndiaEcole Centrale School of Engineering, Mahindra University , Jeedimetla, Telangana 500043, IndiaTopological photonics has emerged as a cutting-edge and intriguing field that permits electromagnetic waves to transmit with minimal losses even when they come in contact with sharp turns or imperfections or defects. In this study, we validate a strategy to realize dynamically amplitude tunable light propagation in a topological waveguide based on a three-dimensional printed valley Hall photonic crystal structure operating in the microwave frequency region. Here, tunable light propagation is facilitated by inserting an active defect in the form of a semiconductor (silicon) material slab across the domain boundary of the topological waveguide. In this configuration, dynamic variation of transmission amplitude is realized via photoexcitation of the semiconductor defect using an external laser of wavelength, $\lambda \,\sim \,510{ }$ nm. This results in active amplitude tunability of $ \sim \, - 10{ }$ dB in topological wave propagation under a photoexcitation of 100 mW. Our demonstrated route can lead to the design of dynamically controlled topological photonic devices such as optical modulators, switches, optical buffers, etc which are important for the development of 6G communication systems.https://doi.org/10.1088/1367-2630/acf519topological insulatorsdynamically tunableelectromagnetic wavesphotonic crystals |
| spellingShingle | Sambhu Jana Koijam Monika Devi Gopal Kulkarni Soumyajyoti Mallick Dibakar Roy Chowdhury Topological edge state assisted dynamically tunable microwave propagations in photonic crystals New Journal of Physics topological insulators dynamically tunable electromagnetic waves photonic crystals |
| title | Topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| title_full | Topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| title_fullStr | Topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| title_full_unstemmed | Topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| title_short | Topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| title_sort | topological edge state assisted dynamically tunable microwave propagations in photonic crystals |
| topic | topological insulators dynamically tunable electromagnetic waves photonic crystals |
| url | https://doi.org/10.1088/1367-2630/acf519 |
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