{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["13(1)"],"submitter":["Tang GJ"],"funding":["National Natural Science Foundation of China","National Key Research and Development Program of China Guangdong Basic and Applied Basic Research Foundation Fundamental Research Funds for the Central Universities, Sun Yat-sen University"],"pubmed_abstract":["3-dB couplers, which are commonly used in photonic integrated circuits for on-chip information processing, precision measurement, and quantum computing, face challenges in achieving robust performance due to their limited 3-dB bandwidths and sensitivity to fabrication errors. To address this, we introduce topological physics to nanophotonics, developing a framework for topological 3-dB couplers. These couplers exhibit broad working wavelength range and robustness against fabrication dimensional errors. By leveraging valley-Hall topology and mirror symmetry, the photonic-crystal-slab couplers achieve ideal 3-dB splitting characterized by a wavelength-insensitive scattering matrix. Tolerance analysis confirms the superiority on broad bandwidth of 48 nm and robust splitting against dimensional errors of 20 nm. We further propose a topological interferometer for on-chip distance measurement, which also exhibits robustness against dimensional errors. This extension of topological principles to the fields of interferometers, may open up new possibilities for constructing robust wavelength division multiplexing, temperature-drift-insensitive sensing, and optical coherence tomography applications."],"journal":["Light, science & applications"],"pagination":["166"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11250792"],"repository":["biostudies-literature"],"pubmed_title":["Broadband and fabrication-tolerant 3-dB couplers with topological valley edge modes."],"pmcid":["PMC11250792"],"pubmed_authors":["Pan YD","Chen XD","Dong JW","Chen HH","Wang HW","Guo CH","Sun L","Li MY","Tang GJ","Su YK","Tian ZT","Sun QY","He XT"],"additional_accession":[]},"is_claimable":false,"name":"Broadband and fabrication-tolerant 3-dB couplers with topological valley edge modes.","description":"3-dB couplers, which are commonly used in photonic integrated circuits for on-chip information processing, precision measurement, and quantum computing, face challenges in achieving robust performance due to their limited 3-dB bandwidths and sensitivity to fabrication errors. To address this, we introduce topological physics to nanophotonics, developing a framework for topological 3-dB couplers. These couplers exhibit broad working wavelength range and robustness against fabrication dimensional errors. By leveraging valley-Hall topology and mirror symmetry, the photonic-crystal-slab couplers achieve ideal 3-dB splitting characterized by a wavelength-insensitive scattering matrix. Tolerance analysis confirms the superiority on broad bandwidth of 48 nm and robust splitting against dimensional errors of 20 nm. We further propose a topological interferometer for on-chip distance measurement, which also exhibits robustness against dimensional errors. This extension of topological principles to the fields of interferometers, may open up new possibilities for constructing robust wavelength division multiplexing, temperature-drift-insensitive sensing, and optical coherence tomography applications.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Jul","modification":"2024-12-04T03:15:19.227Z","creation":"2024-12-04T03:15:19.227Z"},"accession":"S-EPMC11250792","cross_references":{"pubmed":["39009583"],"doi":["10.1038/s41377-024-01512-3"]}}