[2008.09547] Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Mesoscale and Nanoscale Physics arXiv:2008.09547 (cond-mat) [Submitted on 21 Aug 2020] Title: Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves Authors: Si-Yuan Yu , Cheng He , Xiao-Chen Sun , Hong-Fei Wang , Ji-Qian Wang , Zi-Dong Zhang , Bi-Ye Xie , Yuan Tian , Ming-Hui Lu , Yan-Feng Chen View a PDF of the paper titled Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves, by Si-Yuan Yu and 8 other authors View PDF Abstract: Waveguides and resonators are core components in the large-scale integration of electronics, photonics, and phononics, both in existing and future scenarios. In certain situations, there is critical coupling of the two components; i.e., no energy passes through the waveguide after the incoming wave couples into the resonator. The transmission spectral characteristics resulting from this phenomenon are highly advantageous for signal filtering, switching, multiplexing, and sensing. In the present study, adopting an elastic-wave platform, we introduce topological insulator (TI), a remarkable achievement in condensed matter physics over the past decade, into a classical waveguide-ring-resonator configuration. Along with basic similarities with classical systems, a TI system has important differences and advantages, mostly owing to the spin-momentum locked transmission states at the TI boundaries. As an example, a two-port TI waveguide resonator can fundamentally eliminate upstream reflections while completely retaining useful transmission spectral characteristics, and maximize the energy in the resonator, with possible applications being novel signal processing, gyro/sensing, lasering, energy harvesting, and intense wave-matter interactions, using phonons, photons, or even electrons. The present work further enhances the confidence of using topological protection for practical device performance and functionalities, especially considering the crucial advantage of introducing (pseudo)spins to existing conventional configurations. More in-depth research on advancing phononics/photonics, especially on-chip, is foreseen. Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Materials Science (cond-mat.mtrl-sci); Applied Physics (physics.app-ph); Optics (physics.optics) Report number: National Science Review, nwaa262 Cite as: arXiv:2008.09547 [cond-mat.mes-hall] (or arXiv:2008.09547v1 [cond-mat.mes-hall] for this version) https://doi.org/10.48550/arXiv.2008.09547 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Natl. Sci. Rev. 8, nwaa262 (2021) Related DOI : https://doi.org/10.1093/nsr/nwaa262 Focus to learn more DOI(s) linking to related resources Submission history From: Si-Yuan Yu [ view email ] [v1] Fri, 21 Aug 2020 15:45:55 UTC (13,737 KB) Full-text links: Access Paper: View a PDF of the paper titled Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves, by Si-Yuan Yu and 8 other authors View PDF view license Current browse context: cond-mat.mes-hall < prev | next > new | recent | 2020-08 Change to browse by: cond-mat cond-mat.mtrl-sci physics physics.app-ph physics.optics References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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