We propose a chip-integratable cylindrical vector[CV]beam generator by integrating six plasmonic split ring resonators[SRRs]on a planar photonic crystal[PPC]cavity.The employed PPC cavity is formed by cutting six adja...We propose a chip-integratable cylindrical vector[CV]beam generator by integrating six plasmonic split ring resonators[SRRs]on a planar photonic crystal[PPC]cavity.The employed PPC cavity is formed by cutting six adjacent air holes in the PPC center,which could generate a CV beam with azimuthally symmetric polarizations.By further integrating six SRRs on the structure defects of the PPC cavity,the polarizations of the CV beam could be tailored by controlling the opening angles of the SRRs,e.g.,from azimuthal to radial symmetry.The mechanism is governed by the coupling between the resonance modes in SRRs and PPC cavity,which modifies the far-field radiation of the resonance mode of the PPC cavity with the SRR as the nano-antenna.The integration of SRRs also increases the coupling of the generated CV beam with the free-space optics,such as an objective lens,promising its further applications in optical communication,optical tweezer,imaging,etc.展开更多
基金supported by the National Key Research and Development Program of China(Nos.2022YFA1404800 and 2017YFA0303800)the National Natural Science Foundation of China(Nos.91950119,61905196,and 62105263)+1 种基金the Key Research and Development Program in Shaanxi Province of China(No.2020JZ-10)the Fundamental Research Funds for the Central Universities(Nos.310201911cx032,3102019JC008,and 310202011qd002)。
文摘We propose a chip-integratable cylindrical vector[CV]beam generator by integrating six plasmonic split ring resonators[SRRs]on a planar photonic crystal[PPC]cavity.The employed PPC cavity is formed by cutting six adjacent air holes in the PPC center,which could generate a CV beam with azimuthally symmetric polarizations.By further integrating six SRRs on the structure defects of the PPC cavity,the polarizations of the CV beam could be tailored by controlling the opening angles of the SRRs,e.g.,from azimuthal to radial symmetry.The mechanism is governed by the coupling between the resonance modes in SRRs and PPC cavity,which modifies the far-field radiation of the resonance mode of the PPC cavity with the SRR as the nano-antenna.The integration of SRRs also increases the coupling of the generated CV beam with the free-space optics,such as an objective lens,promising its further applications in optical communication,optical tweezer,imaging,etc.
