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Qian C, Jin J, Christensen T, He L, Sigillito A, Mele EJ, Zhen B. Geometric Similarities and Topological Phases in Surface Magnon Polaritons. PHYSICAL REVIEW LETTERS 2024; 132:013601. [PMID: 38242647 DOI: 10.1103/physrevlett.132.013601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 12/04/2023] [Indexed: 01/21/2024]
Abstract
Surface polaritons have proven to be uniquely capable of controlling light-matter interactions. Here we explore surface magnon polaritons in low-loss ferrimagnetic semiconductors, with a focus on their topological phases. We propose several surface magnon polariton devices, including microwave resonators that can strongly enhance magnetic fields and low-loss interconnects joining waveguides with vastly different impedances. Our work can facilitate the exploration of topological phases in polaritons and the development of topological microwave devices for quantum sensing and information processing.
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Affiliation(s)
- Chen Qian
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Jicheng Jin
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Thomas Christensen
- Department of Electrical and Photonics Engineering, Technical University of Denmark, Kongens Lyngby 2800, Denmark
| | - Li He
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Anthony Sigillito
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Eugene J Mele
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Bo Zhen
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Qian C, Jiang Y, Jin J, Christensen T, Soljačić M, Kildishev AV, Zhen B. Topological electromagnetic waves in dispersive and lossy plasma crystals. Sci Rep 2023; 13:20445. [PMID: 37993725 PMCID: PMC10665461 DOI: 10.1038/s41598-023-47848-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/19/2023] [Indexed: 11/24/2023] Open
Abstract
Topological photonic crystals, which offer topologically protected and back-scattering-immune transport channels, have recently gained significant attention for both scientific and practical reasons. Although most current studies focus on dielectric materials with weak dispersions, this study focuses on topological phases in dispersive materials and presents a numerical study of Chern insulators in gaseous-phase plasma cylinder cells. We develop a numerical framework to address the complex material dispersion arising from the plasma medium and external magnetic fields and identify Chern insulator phases that are experimentally achievable. Using this numerical tool, we also explain the flat bands commonly observed in periodic plasmonic structures, via local resonances, and how edge states change as the edge termination is periodically modified. This work opens up opportunities for exploring band topology in new materials with non-trivial dispersions and has potential radio frequency (RF) applications, ranging from plasma-based lighting to plasma propulsion engines.
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Affiliation(s)
- Chen Qian
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, 19104, USA
| | - Yue Jiang
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, 19104, USA
| | - Jicheng Jin
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, 19104, USA
| | - Thomas Christensen
- Massachusetts Institute of Technology, Department of Physics, Cambridge, 02139, USA
| | - Marin Soljačić
- Massachusetts Institute of Technology, Department of Physics, Cambridge, 02139, USA
| | - Alexander V Kildishev
- Elmore Family School of Electrical and Computer Engineering, Purdue University West Lafayette, Birck Nanotechnology Center and Purdue Quantum Science and Engineering Institute (PQSEI), West Lafayette, 47907, USA
| | - Bo Zhen
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, 19104, USA.
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Wang T, Zhang D, Yang S, Lin Z, Chen Q, Yang J, Gong Q, Chen Z, Ye Y, Liu W. Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime. Nat Commun 2023; 14:5966. [PMID: 37749106 PMCID: PMC10520032 DOI: 10.1038/s41467-023-41688-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/14/2023] [Indexed: 09/27/2023] Open
Abstract
Over the past few decades, exciton-polaritons have attracted substantial research interest due to their half-light-half-matter bosonic nature. Coupling exciton-polaritons with magnetic orders grants access to rich many-body phenomena, but has been limited by the availability of material systems that exhibit simultaneous exciton resonances and magnetic ordering. Here we report magnetically-dressed microcavity exciton-polaritons in the van der Waals antiferromagnetic (AFM) semiconductor CrSBr coupled to a Tamm plasmon microcavity. Using angle-resolved spectroscopy, we reveal an exceptionally high exciton-photon coupling strength, up to 169 meV, demonstrating ultrastrong coupling that persists up to room temperature. By performing temperature-dependent spectroscopy, we show the magnetic nature of the exciton-polaritons in CrSBr microcavity as the magnetic order changes from AFM to paramagnetic. By applying an out-of-plane magnetic field, we achieve effective tuning of the polariton energy while maintaining the ultrastrong exciton-photon coupling strength. We attribute this to the spin canting process that modulates the interlayer exciton interaction.
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Affiliation(s)
- Tingting Wang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
| | - Dingyang Zhang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Shiqi Yang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Zhongchong Lin
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Quan Chen
- School of Semiconductor Science and Technology, South China Normal University, Foshan, 528225, China
| | - Jinbo Yang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Qihuang Gong
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
- Yangtze Delta Institute of Optoelectronics, Peking University, Nantong, 226010, China
- Liaoning Academy of Materials, Shenyang, 110167, China
| | - Zuxin Chen
- School of Semiconductor Science and Technology, South China Normal University, Foshan, 528225, China.
| | - Yu Ye
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China.
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.
- Yangtze Delta Institute of Optoelectronics, Peking University, Nantong, 226010, China.
- Liaoning Academy of Materials, Shenyang, 110167, China.
| | - Wenjing Liu
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China.
- Yangtze Delta Institute of Optoelectronics, Peking University, Nantong, 226010, China.
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006, China.
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