The generalized Kerker effects have attracted increasing interests in recent years due to their abilities to manipulate the far-field properties of metasurfaces.However,the dual-polarized generalized Kerker effect ena...The generalized Kerker effects have attracted increasing interests in recent years due to their abilities to manipulate the far-field properties of metasurfaces.However,the dual-polarized generalized Kerker effect enabling different tailoring of orthogonally-polarized electromagnetic waves has not yet been reported.Herein,we demonstrate polarization-controlled dual resonant lattice Kerker effects in periodic silicon nanodisks.By varying the incident angle,the electric dipole and magnetic dipole surface lattice resonances can spectrally overlap,causing zero reflectance and unitary transmittance,i.e.,the resonant lattice Kerker effect.The incident angle for achieving this effect can be tuned differently for s-and p-polarizations over large regions by varying the nanodisk size or the lattice periods.The proposed dual-polarized resonant lattice Kerker effects open up avenues for polarization-controlled manipulation of the phase and wavefront of light with metasurfaces.展开更多
Broadband transverse displacement sensing by exploiting the interaction of a focused radially polarized beam with a silicon hollow nanodisk is proposed.The multipolar decomposition analysis indicates that the interfer...Broadband transverse displacement sensing by exploiting the interaction of a focused radially polarized beam with a silicon hollow nanodisk is proposed.The multipolar decomposition analysis indicates that the interference between a longitudinal total electric dipole(TED)moment and a lateral magnetic dipole(MD)moment is dominant in the far-field transverse scattering in the near-infrared region.Within a broadband wavelength range with the width of 155 nm,the longitudinal TED is almost in phase with the lateral MD,and then broadband position sensing based on the sensitivity of scattering directivity to transverse displacement can be achieved.展开更多
Freely switching light transmission and absorption via an achromatic reflectionless screen is highly desired for many photonic applications(e.g.,energy-harvesting,cloaking,etc.),but available meta-devices often exhibi...Freely switching light transmission and absorption via an achromatic reflectionless screen is highly desired for many photonic applications(e.g.,energy-harvesting,cloaking,etc.),but available meta-devices often exhibit reflections out of their narrow working bands.Here,we rigorously demonstrate that an optical metasurface formed by two resonator arrays coupled vertically can be perfectly reflectionless at all frequencies below the first diffraction mode,when the near-field(NF)and far-field(FF)couplings between two constitutional resonators satisfy certain conditions.Tuning intrinsic loss of the system can further modulate the ratio between light transmission and absorption,yet keeping reflection diminished strictly.Designing/fabricating a series of metasurfaces with different inter-resonator configurations,we experimentally illustrate how varying inter-resonator NF and FF couplings can drive the system to transit between different phase regions in a generic phase diagram.In particular,we experimentally demonstrate that a realistic metasurface satisfying the discovered criteria exhibits the desired achromatic reflectionless property within 160-220 THz(0-225 THz in simulation),yet behaving as a perfect absorber at~203 THz.Our findings pave the road to realize meta-devices exhibiting designable transmission/absorption spectra immune from reflections,which may find many applications in practice.展开更多
基金supported by the Natural Science Foundation of Guangdong Province(No.2022A1515010086)the Shenzhen Research Foundation(No.JCYJ20180507182444250)the Shenzhen Institute of Artificial Intelligence and Robotics for Society,and the State Key Laboratory of Advanced Optical Communication Systems and Networks,China(No.2020GZKF004).
文摘The generalized Kerker effects have attracted increasing interests in recent years due to their abilities to manipulate the far-field properties of metasurfaces.However,the dual-polarized generalized Kerker effect enabling different tailoring of orthogonally-polarized electromagnetic waves has not yet been reported.Herein,we demonstrate polarization-controlled dual resonant lattice Kerker effects in periodic silicon nanodisks.By varying the incident angle,the electric dipole and magnetic dipole surface lattice resonances can spectrally overlap,causing zero reflectance and unitary transmittance,i.e.,the resonant lattice Kerker effect.The incident angle for achieving this effect can be tuned differently for s-and p-polarizations over large regions by varying the nanodisk size or the lattice periods.The proposed dual-polarized resonant lattice Kerker effects open up avenues for polarization-controlled manipulation of the phase and wavefront of light with metasurfaces.
基金This work was supported by the Key Program of the Natural Science Foundation of Tianjin(No.19JCZDJC32700)the Science and Technology Support Program of Tianjin(No.17YFZCSY00740)。
文摘Broadband transverse displacement sensing by exploiting the interaction of a focused radially polarized beam with a silicon hollow nanodisk is proposed.The multipolar decomposition analysis indicates that the interference between a longitudinal total electric dipole(TED)moment and a lateral magnetic dipole(MD)moment is dominant in the far-field transverse scattering in the near-infrared region.Within a broadband wavelength range with the width of 155 nm,the longitudinal TED is almost in phase with the lateral MD,and then broadband position sensing based on the sensitivity of scattering directivity to transverse displacement can be achieved.
基金National Key Research and Development Program of China(No.2017YFA0700201)National Natural Science Foundation of China(No.11734007,No.12221004,No.62192771)+1 种基金Natural Science Foundation of Shanghai(No.20JC1414601)China Postdoctoral Science Foundation(No.2021 M690710).
文摘Freely switching light transmission and absorption via an achromatic reflectionless screen is highly desired for many photonic applications(e.g.,energy-harvesting,cloaking,etc.),but available meta-devices often exhibit reflections out of their narrow working bands.Here,we rigorously demonstrate that an optical metasurface formed by two resonator arrays coupled vertically can be perfectly reflectionless at all frequencies below the first diffraction mode,when the near-field(NF)and far-field(FF)couplings between two constitutional resonators satisfy certain conditions.Tuning intrinsic loss of the system can further modulate the ratio between light transmission and absorption,yet keeping reflection diminished strictly.Designing/fabricating a series of metasurfaces with different inter-resonator configurations,we experimentally illustrate how varying inter-resonator NF and FF couplings can drive the system to transit between different phase regions in a generic phase diagram.In particular,we experimentally demonstrate that a realistic metasurface satisfying the discovered criteria exhibits the desired achromatic reflectionless property within 160-220 THz(0-225 THz in simulation),yet behaving as a perfect absorber at~203 THz.Our findings pave the road to realize meta-devices exhibiting designable transmission/absorption spectra immune from reflections,which may find many applications in practice.
