Advanced Photonics, Volume. 6, Issue 4, 046005(2024)
Tunable topological polaritons by dispersion tailoring of an active metasurface
Fig. 1. Electrically reconfigurable topology of polariton dispersions with tunable metasurface. (a) Conceptual schematic of topologically reconfigurable polaritons, where the proposed reconfigurable metasurface allows for surface wavefront control from convex to collimating and eventually to concave and convex, by applying different external bias-voltage. The black arrow represents the excitation source. Bottom-right panels show the schematic of the unit cell. (b), (c) Dispersions of the polaritons along the (b)
Fig. 2. Simulations and experiments of the topologically active polaritons by the proposed reconfigurable metasurface. (a) Elliptical, flat, hyperbolic, and circular topology of IFC of the polaritons at the observation frequency of 6.1 GHz. (b), (c) Simulated field distributions [real part of the
Fig. 3. Controllable field canalization and tunable planar focusing based on topological transition of polariton dispersions. (a) Topological transition regions as a function of frequency and loaded capacitance value
Fig. 4. Reconfigurable integrated polariton circuit. (a) Schematic of the planar reconfigurable polariton circuit composed of two regions (region 1 and region 2) represented by blue and orange blocks, respectively. The loaded capacitances of unit cells are different in region 1 and region 2, leading to different topologies of polariton dispersions. (b)–(d) Simulated field distributions [Re (
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Shaojie Wang, Ke Chen, Shufang Dong, Tian Jiang, Junming Zhao, Yijun Feng, "Tunable topological polaritons by dispersion tailoring of an active metasurface," Adv. Photon. 6, 046005 (2024)
Category: Research Articles
Received: May. 4, 2024
Accepted: Jul. 17, 2024
Posted: Jul. 17, 2024
Published Online: Aug. 21, 2024
The Author Email: Chen Ke (ke.chen@nju.edu.cn), Feng Yijun (yjfeng@nju.edu.cn)