Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip
Dynamically encircling exceptional points (EEPs) in non-Hermitian systems have been utilized to realize robust on-chip mode conversions by taking the advantage that the output states are usually fixed and independent of the input states. This highly protects one of the specific eigenstates, but rest...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2024-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.013203 |
| _version_ | 1827284969714614272 |
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| author | Chu Li Meng Li Ruiqi Wang Yang Chen Xifeng Ren Linyu Yan Qiang Li Qihuang Gong Yan Li |
| author_facet | Chu Li Meng Li Ruiqi Wang Yang Chen Xifeng Ren Linyu Yan Qiang Li Qihuang Gong Yan Li |
| author_sort | Chu Li |
| collection | DOAJ |
| description | Dynamically encircling exceptional points (EEPs) in non-Hermitian systems have been utilized to realize robust on-chip mode conversions by taking the advantage that the output states are usually fixed and independent of the input states. This highly protects one of the specific eigenstates, but restricts their practical applications requiring superposition states. Here, we realize an on-chip robust eigenstate generator using a depth-varying 3D waveguide to overpass the EEP system. It not only preserves the robustness of the EEP system to generate one determinate eigenstate, but also generates another two-level eigenstate and arbitrary superposition states. Furthermore, by ingeniously combining two identical generators with a symmetric Y combiner, both the all-optical XOR and OR logic operations insensitive to the variations in the input light are realized by the destructive or constructive interference between the two generators' near-neighboring output signals. This paper paves the way for applications of EEP systems to highly robust state manipulations and information processing in integrated photonic and quantum devices. |
| first_indexed | 2024-04-24T10:07:15Z |
| format | Article |
| id | doaj.art-4ea6df9312af4c3f9a6eaa7af5277018 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:07:15Z |
| publishDate | 2024-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-4ea6df9312af4c3f9a6eaa7af52770182024-04-12T17:39:37ZengAmerican Physical SocietyPhysical Review Research2643-15642024-02-016101320310.1103/PhysRevResearch.6.013203Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chipChu LiMeng LiRuiqi WangYang ChenXifeng RenLinyu YanQiang LiQihuang GongYan LiDynamically encircling exceptional points (EEPs) in non-Hermitian systems have been utilized to realize robust on-chip mode conversions by taking the advantage that the output states are usually fixed and independent of the input states. This highly protects one of the specific eigenstates, but restricts their practical applications requiring superposition states. Here, we realize an on-chip robust eigenstate generator using a depth-varying 3D waveguide to overpass the EEP system. It not only preserves the robustness of the EEP system to generate one determinate eigenstate, but also generates another two-level eigenstate and arbitrary superposition states. Furthermore, by ingeniously combining two identical generators with a symmetric Y combiner, both the all-optical XOR and OR logic operations insensitive to the variations in the input light are realized by the destructive or constructive interference between the two generators' near-neighboring output signals. This paper paves the way for applications of EEP systems to highly robust state manipulations and information processing in integrated photonic and quantum devices.http://doi.org/10.1103/PhysRevResearch.6.013203 |
| spellingShingle | Chu Li Meng Li Ruiqi Wang Yang Chen Xifeng Ren Linyu Yan Qiang Li Qihuang Gong Yan Li Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip Physical Review Research |
| title | Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip |
| title_full | Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip |
| title_fullStr | Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip |
| title_full_unstemmed | Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip |
| title_short | Dynamically encircling exceptional points for robust eigenstate generation and all-optical logic operations in a three-dimensional photonic chip |
| title_sort | dynamically encircling exceptional points for robust eigenstate generation and all optical logic operations in a three dimensional photonic chip |
| url | http://doi.org/10.1103/PhysRevResearch.6.013203 |
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