Tunable topological phase transition in the telecommunication wavelength
Recent progress in the Valley Hall insulator has demonstrated a nontrivial topology property due to the distinct valley index in 2D semiconductor systems. In this work, we propose a highly tunable topological phase transition based on valley photonic crystals. The topological phase transition is rea...
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sg-ntu-dr.10356-1714842023-10-30T15:35:22Z Tunable topological phase transition in the telecommunication wavelength Tian, Fanglin Zhou, Junxiao Wang, Qiang Liu, Zhaowei School of Physical and Mathematical Sciences Science::Physics Change Metasurface Valley Hall Insulator Recent progress in the Valley Hall insulator has demonstrated a nontrivial topology property due to the distinct valley index in 2D semiconductor systems. In this work, we propose a highly tunable topological phase transition based on valley photonic crystals. The topological phase transition is realized by the inversion symmetry broken due to the refractive index change of structures consisting of optical phase change material (OPCM) with thermal excitation of different sites in a honeycomb lattice structure. Besides, simulations of light propagation at sharp corners and pseudo-spin photon coupling are conducted to quantitatively examine the topological protection. Compared with other electro-optical materials based on reconfigurable topological photonics, a wider bandwidth and greater tunability of both central bandgap frequency and topological phase transition can happen in the proposed scheme. Our platform has great potential in practical applications in lasing, light sensing, and high-contrast tunable optical filters. Published version This work was funded by National Science Foundation (NSF-ECCS-1907423). 2023-10-26T04:10:24Z 2023-10-26T04:10:24Z 2023 Journal Article Tian, F., Zhou, J., Wang, Q. & Liu, Z. (2023). Tunable topological phase transition in the telecommunication wavelength. Optical Materials Express, 13(6), 1571-1578. https://dx.doi.org/10.1364/OME.487619 2159-3930 https://hdl.handle.net/10356/171484 10.1364/OME.487619 2-s2.0-85162233245 6 13 1571 1578 en Optical Materials Express © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement. application/pdf |
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Science::Physics Change Metasurface Valley Hall Insulator Tian, Fanglin Zhou, Junxiao Wang, Qiang Liu, Zhaowei Tunable topological phase transition in the telecommunication wavelength |
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Recent progress in the Valley Hall insulator has demonstrated a nontrivial topology property due to the distinct valley index in 2D semiconductor systems. In this work, we propose a highly tunable topological phase transition based on valley photonic crystals. The topological phase transition is realized by the inversion symmetry broken due to the refractive index change of structures consisting of optical phase change material (OPCM) with thermal excitation of different sites in a honeycomb lattice structure. Besides, simulations of light propagation at sharp corners and pseudo-spin photon coupling are conducted to quantitatively examine the topological protection. Compared with other electro-optical materials based on reconfigurable topological photonics, a wider bandwidth and greater tunability of both central bandgap frequency and topological phase transition can happen in the proposed scheme. Our platform has great potential in practical applications in lasing, light sensing, and high-contrast tunable optical filters. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Tian, Fanglin Zhou, Junxiao Wang, Qiang Liu, Zhaowei |
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Article |
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Tian, Fanglin Zhou, Junxiao Wang, Qiang Liu, Zhaowei |
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Tian, Fanglin |
title |
Tunable topological phase transition in the telecommunication wavelength |
title_short |
Tunable topological phase transition in the telecommunication wavelength |
title_full |
Tunable topological phase transition in the telecommunication wavelength |
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Tunable topological phase transition in the telecommunication wavelength |
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Tunable topological phase transition in the telecommunication wavelength |
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tunable topological phase transition in the telecommunication wavelength |
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2023 |
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https://hdl.handle.net/10356/171484 |
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