Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions
Abstract We study the nonlinear optical properties of heterojunctions made of graphene nanoribbons (GNRs) consisting of two segments with either the same or different topological properties. By utilizing a quantum mechanical approach that incorporates distant-neighbor interactions, we demonstrate th...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2023-09-01
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| Series: | Quantum Frontiers |
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| Online Access: | https://doi.org/10.1007/s44214-023-00036-y |
| _version_ | 1797451901508255744 |
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| author | Hanying Deng Zhihao Qu Yingji He Changming Huang Nicolae C. Panoiu Fangwei Ye |
| author_facet | Hanying Deng Zhihao Qu Yingji He Changming Huang Nicolae C. Panoiu Fangwei Ye |
| author_sort | Hanying Deng |
| collection | DOAJ |
| description | Abstract We study the nonlinear optical properties of heterojunctions made of graphene nanoribbons (GNRs) consisting of two segments with either the same or different topological properties. By utilizing a quantum mechanical approach that incorporates distant-neighbor interactions, we demonstrate that the presence of topological interface states significantly enhances the second- and third-order nonlinear optical response of GNR heterojunctions that are created by merging two topologically inequivalent GNRs. Specifically, GNR heterojunctions with topological interface states display third-order harmonic hyperpolarizabilities that are more than two orders of magnitude larger than those of their similarly sized counterparts without topological interface states, whereas the second-order harmonic hyperpolarizabilities exhibit a more than ten-fold contrast between heterojunctions with and without topological interface states. Additionally, we find that the topological state at the interface between two topologically distinct GNRs can induce a noticeable red-shift of the quantum plasmon frequency of the heterojunctions. Our results reveal a general and profound connection between the existence of topological states and an enhanced nonlinear optical response of graphene nanostructures and possible other photonic systems. |
| first_indexed | 2024-03-09T15:01:07Z |
| format | Article |
| id | doaj.art-88e6e11ac3da4de8b484e7ec2fe35f74 |
| institution | Directory Open Access Journal |
| issn | 2731-6106 |
| language | English |
| last_indexed | 2024-03-09T15:01:07Z |
| publishDate | 2023-09-01 |
| publisher | Springer |
| record_format | Article |
| series | Quantum Frontiers |
| spelling | doaj.art-88e6e11ac3da4de8b484e7ec2fe35f742023-11-26T13:55:32ZengSpringerQuantum Frontiers2731-61062023-09-01211910.1007/s44214-023-00036-yTopologically enhanced nonlinear optical response of graphene nanoribbon heterojunctionsHanying Deng0Zhihao Qu1Yingji He2Changming Huang3Nicolae C. Panoiu4Fangwei Ye5School of Optoelectronic Engineering, Guangdong Polytechnic Normal UniversitySchool of Optoelectronic Engineering, Guangdong Polytechnic Normal UniversitySchool of Optoelectronic Engineering, Guangdong Polytechnic Normal UniversityDepartment of Physics, Changzhi UniversityDepartment of Electronic and Electrical Engineering, University College LondonSchool of Physics and Astronomy, Shanghai Jiao Tong UniversityAbstract We study the nonlinear optical properties of heterojunctions made of graphene nanoribbons (GNRs) consisting of two segments with either the same or different topological properties. By utilizing a quantum mechanical approach that incorporates distant-neighbor interactions, we demonstrate that the presence of topological interface states significantly enhances the second- and third-order nonlinear optical response of GNR heterojunctions that are created by merging two topologically inequivalent GNRs. Specifically, GNR heterojunctions with topological interface states display third-order harmonic hyperpolarizabilities that are more than two orders of magnitude larger than those of their similarly sized counterparts without topological interface states, whereas the second-order harmonic hyperpolarizabilities exhibit a more than ten-fold contrast between heterojunctions with and without topological interface states. Additionally, we find that the topological state at the interface between two topologically distinct GNRs can induce a noticeable red-shift of the quantum plasmon frequency of the heterojunctions. Our results reveal a general and profound connection between the existence of topological states and an enhanced nonlinear optical response of graphene nanostructures and possible other photonic systems.https://doi.org/10.1007/s44214-023-00036-yGraphene nanoribbon heterojunctionTopological stateNonlinear optical propertiesQuantum mechanical approach |
| spellingShingle | Hanying Deng Zhihao Qu Yingji He Changming Huang Nicolae C. Panoiu Fangwei Ye Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions Quantum Frontiers Graphene nanoribbon heterojunction Topological state Nonlinear optical properties Quantum mechanical approach |
| title | Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| title_full | Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| title_fullStr | Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| title_full_unstemmed | Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| title_short | Topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| title_sort | topologically enhanced nonlinear optical response of graphene nanoribbon heterojunctions |
| topic | Graphene nanoribbon heterojunction Topological state Nonlinear optical properties Quantum mechanical approach |
| url | https://doi.org/10.1007/s44214-023-00036-y |
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