【摘 要】
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Lithium niobate[LiNb03]is a versatile crystalline material for various photonic applications.With the recent advances in LiNb03-on-insulator[LNOI]thin film technology,LiNb03 has been regarded as one of the most promising platforms for multi-functional int
【机 构】
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School of Physics,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China;S
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Lithium niobate[LiNb03]is a versatile crystalline material for various photonic applications.With the recent advances in LiNb03-on-insulator[LNOI]thin film technology,LiNb03 has been regarded as one of the most promising platforms for multi-functional integrated photonics.In this work,we present the field enhancement due to collective resonances in arrayed LiNb03 nanoantennas.These resonances arise from the enhanced radiative coupling of localized Mie resonances in the individual nanoparticles and Rayleigh anomalies due to in-plane diffraction orders of the lattice.We describe the pronounced differences in field enhancement and field distributions for electric and magnetic dipoles,offering valuable information for the design and optimization of high-quality-factor optical metasurfaces based on LiNb03.
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