Thermally tunable add-drop filter based on valley photonic crystals for optical communications
Valley photonic crystals (VPCs) provide an intriguing approach to suppress backscattering losses and enable robust transport of light against sharp bends, which could be utilized to realize low-loss and small-footprint devices for on-chip optical communications. However, there are few studies on how...
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-10-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0437 |
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| author | Sun Lu Li Xingfeng Hu Pan Wang Hongwei Zhang Yong Tang Guojing He Xintao Dong Jianwen Su Yikai |
| author_facet | Sun Lu Li Xingfeng Hu Pan Wang Hongwei Zhang Yong Tang Guojing He Xintao Dong Jianwen Su Yikai |
| author_sort | Sun Lu |
| collection | DOAJ |
| description | Valley photonic crystals (VPCs) provide an intriguing approach to suppress backscattering losses and enable robust transport of light against sharp bends, which could be utilized to realize low-loss and small-footprint devices for on-chip optical communications. However, there are few studies on how to achieve power-efficient tunable devices based on VPCs, which are essential for implementing basic functions such as optical switching and routing. Here, we propose and experimentally demonstrate a thermally tunable add-drop filter (ADF) based on VPCs operating at telecommunication wavelengths. By leveraging the topological protection of the edge state and the distinct property of negligible scattering at sharp bends, a small footprint of 17.4 × 28.2 μm2 and a low insertion loss of 2.7 dB can be achieved for the proposed device. A diamond-shaped microloop resonator is designed to confine the light and enhance its interaction with the thermal field generated by the microheater, leading to a relatively low power of 23.97 mW needed for switching the output signal from one port to the other. Based on the thermally tunable ADF under the protection of band topology, robust data transmission is implemented with an ultrahigh data rate of 132 Gb/s. Our work shows great potential for developing high-performance topological photonic devices with the thermally tunable silicon-based VPCs, which offers unprecedented opportunities for realizing topologically protected and reconfigurable high-speed datalinks on a chip. |
| format | Article |
| id | doaj-art-573e14b93fae4335930e060fcecb1d32 |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-573e14b93fae4335930e060fcecb1d322025-02-10T13:24:47ZengDe GruyterNanophotonics2192-86142024-10-0113244459447010.1515/nanoph-2024-0437Thermally tunable add-drop filter based on valley photonic crystals for optical communicationsSun Lu0Li Xingfeng1Hu Pan2Wang Hongwei3Zhang Yong4Tang Guojing5He Xintao6Dong Jianwen7Su Yikai8State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou510275, ChinaState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, 12474Shanghai Jiao Tong University, Shanghai200240, ChinaValley photonic crystals (VPCs) provide an intriguing approach to suppress backscattering losses and enable robust transport of light against sharp bends, which could be utilized to realize low-loss and small-footprint devices for on-chip optical communications. However, there are few studies on how to achieve power-efficient tunable devices based on VPCs, which are essential for implementing basic functions such as optical switching and routing. Here, we propose and experimentally demonstrate a thermally tunable add-drop filter (ADF) based on VPCs operating at telecommunication wavelengths. By leveraging the topological protection of the edge state and the distinct property of negligible scattering at sharp bends, a small footprint of 17.4 × 28.2 μm2 and a low insertion loss of 2.7 dB can be achieved for the proposed device. A diamond-shaped microloop resonator is designed to confine the light and enhance its interaction with the thermal field generated by the microheater, leading to a relatively low power of 23.97 mW needed for switching the output signal from one port to the other. Based on the thermally tunable ADF under the protection of band topology, robust data transmission is implemented with an ultrahigh data rate of 132 Gb/s. Our work shows great potential for developing high-performance topological photonic devices with the thermally tunable silicon-based VPCs, which offers unprecedented opportunities for realizing topologically protected and reconfigurable high-speed datalinks on a chip.https://doi.org/10.1515/nanoph-2024-0437topological photonicsvalley photonic crystalsoptical communications |
| spellingShingle | Sun Lu Li Xingfeng Hu Pan Wang Hongwei Zhang Yong Tang Guojing He Xintao Dong Jianwen Su Yikai Thermally tunable add-drop filter based on valley photonic crystals for optical communications Nanophotonics topological photonics valley photonic crystals optical communications |
| title | Thermally tunable add-drop filter based on valley photonic crystals for optical communications |
| title_full | Thermally tunable add-drop filter based on valley photonic crystals for optical communications |
| title_fullStr | Thermally tunable add-drop filter based on valley photonic crystals for optical communications |
| title_full_unstemmed | Thermally tunable add-drop filter based on valley photonic crystals for optical communications |
| title_short | Thermally tunable add-drop filter based on valley photonic crystals for optical communications |
| title_sort | thermally tunable add drop filter based on valley photonic crystals for optical communications |
| topic | topological photonics valley photonic crystals optical communications |
| url | https://doi.org/10.1515/nanoph-2024-0437 |
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