Source-configured symmetry-broken hyperbolic polaritons
作者机构：Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Optics Valley LaboratoryHubei 430074China Faculty of Materials Science and ChemistryEngineering Research Center of NanoGeomaterials of Ministry of EducationChina University of GeosciencesWuhan 430074China Xidian UniversityXi’an 710126China
出 版 物：《eLight》 (e光学（英文）)
年 卷 期：2023年第3卷第1期
页 面：136-146页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
基 金：the National Natural Science Foundation of China(Grant No.62075070 and 52172162) National Key Research and Development Program of China(Grant No.2021YFA1201500) Hubei Provincial Natural Science Foundation of China(Grant No.2022CFA053) the Innovation Fund of WNLO the Natural Science Foundation of Guangdong Province(2022A1515012145) Shenzhen Science and Technology Program(JCYJ20220530162403007) Key Research and Development Plan of Hubei Province the Fundamental Research Funds for the Central Universities,HUST(Grant No.2022JYCXJJ009)
主 题：Hyperbolic polaritons Near-field excitation Crystal symmetry In-plane polarization Calcite
摘 要：Polaritons are quasi-particles that combine light with matter,enabling precise control of light at deep subwavelength *** excitation and propagation of polaritons are closely linked to the structural symmetries of the host materials,resulting in symmetrical polariton propagation in high-symmetry ***,in low-symmetry crystals,symmetry-broken polaritons exist,exhibiting enhanced directionality of polariton propagation for nanoscale light manipulation and ***,we theoretically propose and experimentally demonstrate the existence of symmetry-broken polaritons,with hyperbolic dispersion,in a high-symmetry *** show that an optical disk-antenna positioned on the crystal surface can act as an in-plane polarized excitation source,enabling dynamic tailoring of the asymmetry of hyperbolic polariton propagation in the high-symmetry crystal over a broad frequency ***,we provide an intuitive analysis model that predicts the condition under which the asymmetric polaritonic behavior is maximized,which is corroborated by our simulations and *** results demonstrate that the directionality of polariton propagation can be conveniently configured,independent of the structure symmetry of crystals,providing a tuning knob for the polaritonic response and in-plane anisotropy in nanophotonic applications.
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