{"id":"doi:10.1038/s41467-023-38367-y","kind":"article","title":"Brillouin zone folding driven bound states in the continuum","authors":["Wenhao Wang","Yogesh Kumar Srivastava","Thomas Caiwei Tan","Zhiming M. Wang","Ranjan Singh"],"author_count":5,"year":2023,"published":"2023-05-17","venue":"Nature Communications","cited_by":273,"doi":"10.1038/s41467-023-38367-y","arxiv_id":null,"nct_id":null,"source_url":"https://doi.org/10.1038/s41467-023-38367-y","archive_url":"https://space-kitty.com/papers/doi:10.1038/s41467-023-38367-y","updated":null,"pmid":"37198151","pmcid":null,"openalex_id":"W4377011249","pdf_url":"https://www.nature.com/articles/s41467-023-38367-y.pdf","abstract":"Non-radiative bound states in the continuum (BICs) allow construction of resonant cavities with confined electromagnetic energy and high-quality (Q) factors. However, the sharp decay of the Q factor in the momentum space limits their usefulness for device applications. Here we demonstrate an approach to achieve sustainable ultrahigh Q factors by engineering Brillouin zone folding-induced BICs (BZF-BICs). All the guided modes are folded into the light cone through periodic perturbation that leads to the emergence of BZF-BICs possessing ultrahigh Q factors throughout the large, tunable momentum space. Unlike conventional BICs, BZF-BICs show perturbation-dependent dramatic enhancement of the Q factor in the entire momentum space and are robust against structural disorders. Our work provides a unique design path for BZF-BIC-based silicon metasurface cavities with extreme robustness against disorder while sustaining ultrahigh Q factors, offering potential applications in terahertz devices, nonlinear optics, quantum computing, and photonic integrated circuits.","abstract_license":"CC-BY (publisher license, via OpenAlex)","license":"cc-by","is_open_access":true,"retracted":false,"peer_reviewed":null,"categories":["Metamaterials and Metasurfaces Applications"],"details":null,"provenance":"openalex","attribution":"Abstract of \"Brillouin zone folding driven bound states in the continuum\" by Wenhao Wang, Yogesh Kumar Srivastava, Thomas Caiwei Tan et al., https://doi.org/10.1038/s41467-023-38367-y, used under its Creative Commons Attribution license (CC-BY); markup removed, otherwise unmodified.","topics":[{"slug":"photonic-topological-qubits","name":"Photonic, Spin & Topological Qubits","domain_slug":"quantum-computing"}],"cited_in_dossiers":[]}