Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave
Integration of multiple diversified functionalities into an ultracompact platform is crucial for the development of on-chip photonic devices. Recently, a promising all-dielectric two-dimensional platform based on Bloch surface waves (BSWs) sustained by dielectric multilayer has been proposed to enab...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-09-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2022-0397 |
| _version_ | 1811320106058252288 |
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| author | Lei Xinrui Wang Ruxue Liu Li Xu Chengjie Wu Aimin Zhan Qiwen |
| author_facet | Lei Xinrui Wang Ruxue Liu Li Xu Chengjie Wu Aimin Zhan Qiwen |
| author_sort | Lei Xinrui |
| collection | DOAJ |
| description | Integration of multiple diversified functionalities into an ultracompact platform is crucial for the development of on-chip photonic devices. Recently, a promising all-dielectric two-dimensional platform based on Bloch surface waves (BSWs) sustained by dielectric multilayer has been proposed to enable various functionalities and provide novel approach to photonic devices. Here, we design and fabricate a multifunctional directional coupler to achieve both spectral and polarimetric routing by employing asymmetric nanoslits in a dielectric multilayer platform. Due to the dispersion property of BSWs, the directional coupling behavior is sensitive to wavelength and polarization. We demonstrate numerically and experimentally the wavelength selective directional coupling of TE BSW mode with an intensity ratio of the BSW excitation in opposite directions reaching 10 dB. Polarization selective directional coupling is also achieved at specific operating wavelength due to different response to a nanoantenna for TE and TM BSWs. The proposed two-dimensional photonic device opens new pathway for a wide range of practical applications such as molecular sensing, imaging with different polarization, and spectral requirements. |
| first_indexed | 2024-04-13T12:53:33Z |
| format | Article |
| id | doaj.art-0346548c2e664f6eb4829ad08dc50966 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-04-13T12:53:33Z |
| publishDate | 2022-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-0346548c2e664f6eb4829ad08dc509662022-12-22T02:46:07ZengDe GruyterNanophotonics2192-86142022-09-0111214627463610.1515/nanoph-2022-0397Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface waveLei Xinrui0Wang Ruxue1Liu Li2Xu Chengjie3Wu Aimin4Zhan Qiwen5School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, CAS, Shanghai, 200050, P. R. ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, CAS, Shanghai, 200050, P. R. ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, CAS, Shanghai, 200050, P. R. ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, CAS, Shanghai, 200050, P. R. ChinaSchool of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. ChinaIntegration of multiple diversified functionalities into an ultracompact platform is crucial for the development of on-chip photonic devices. Recently, a promising all-dielectric two-dimensional platform based on Bloch surface waves (BSWs) sustained by dielectric multilayer has been proposed to enable various functionalities and provide novel approach to photonic devices. Here, we design and fabricate a multifunctional directional coupler to achieve both spectral and polarimetric routing by employing asymmetric nanoslits in a dielectric multilayer platform. Due to the dispersion property of BSWs, the directional coupling behavior is sensitive to wavelength and polarization. We demonstrate numerically and experimentally the wavelength selective directional coupling of TE BSW mode with an intensity ratio of the BSW excitation in opposite directions reaching 10 dB. Polarization selective directional coupling is also achieved at specific operating wavelength due to different response to a nanoantenna for TE and TM BSWs. The proposed two-dimensional photonic device opens new pathway for a wide range of practical applications such as molecular sensing, imaging with different polarization, and spectral requirements.https://doi.org/10.1515/nanoph-2022-0397bloch surface wavesmultifunctionalnanoantennaon-chip photonic devicespectral and polarimetric routing |
| spellingShingle | Lei Xinrui Wang Ruxue Liu Li Xu Chengjie Wu Aimin Zhan Qiwen Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave Nanophotonics bloch surface waves multifunctional nanoantenna on-chip photonic device spectral and polarimetric routing |
| title | Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave |
| title_full | Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave |
| title_fullStr | Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave |
| title_full_unstemmed | Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave |
| title_short | Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave |
| title_sort | multifunctional on chip directional coupler for spectral and polarimetric routing of bloch surface wave |
| topic | bloch surface waves multifunctional nanoantenna on-chip photonic device spectral and polarimetric routing |
| url | https://doi.org/10.1515/nanoph-2022-0397 |
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