典型文献
Multifunctional resonant wavefront-shaping meta-optics based on multilayer and multi-perturbation nonlocal metasurfaces
文献摘要：
Photonic devices rarely provide both elaborate spatial control and sharp spectral control over an incoming wavefront.In optical metasurfaces,for example,the localized modes of individual meta-units govern the wavefront shape over a broad bandwidth,while nonlocal lattice modes extended over many unit cells support high quality-factor resonances.Here,we experimentally demonstrate nonlocal dielectric metasurfaces in the near-infrared that offer both spatial and spectral control of light,realizing metalenses focusing light exclusively over a narrowband resonance while leaving off-resonant frequencies unaffected.Our devices attain this functionality by supporting a quasi-bound state in the continuum encoded with a spatially varying geometric phase.We leverage this capability to experimentally realize a versatile platform for multispectral wavefront shaping where a stack of metasurfaces,each supporting multiple independently controlled quasi-bound states in the continuum,molds the optical wavefront distinctively at multiple wavelengths and yet stay transparent over the rest of the spectrum.Such a platform is scalable to the visible for applications in augmented reality and transparent displays.
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作者姓名：
Stephanie C.Malek;Adam C.Overvig;Andrea Alù;Nanfang Yu
作者机构：
Department of Applied Physics and Applied Mathematics,Columbia University,New York,NY 10027,USA;Photonics Initiative,Advanced Science Research Center,City University of New York,New York,NY 10031,USA;Physics Program,Graduate Center,City University of New York,New York,NY 10016,USA
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引用格式：
[1]Stephanie C.Malek;Adam C.Overvig;Andrea Alù;Nanfang Yu-.Multifunctional resonant wavefront-shaping meta-optics based on multilayer and multi-perturbation nonlocal metasurfaces)[J].光：科学与应用（英文版）,2022(09):2194-2206
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Multifunctional,resonant,wavefront,shaping,optics,multilayer,perturbation,nonlocal,metasurfaces,Photonic,devices,rarely,provide,both,elaborate,sharp,incoming,In,optical,example,localized,modes,individual,units,govern,shape,broad,bandwidth,while,lattice,extended,many,cells,high,quality,resonances,Here,we,experimentally,demonstrate,dielectric,near,infrared,that,offer,light,realizing,metalenses,focusing,exclusively,narrowband,leaving,frequencies,unaffected,Our,attain,this,functionality,by,supporting,quasi,bound,continuum,encoded,spatially,varying,geometric,phase,We,leverage,capability,realize,versatile,platform,multispectral,where,stack,each,multiple,independently,controlled,states,molds,distinctively,wavelengths,yet,stay,transparent,rest,spectrum,Such,scalable,visible,applications,augmented,reality,displays
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0.631154
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