All-dielectric metasurface for fully resolving arbitrary beams on a higher-order Poincaré sphere

Abstract

Characterizing the amplitude, phase profile, and polarization of optical beams is critical in modern optics. With a series of cascaded optical components, one can accurately resolve the optical singularity and polarization state in traditional polarimetry systems. However, complicated optical setups and bulky configurations inevitably hinder future applications for integration. Here, we demonstrate a metadevice that fully resolves arbitrary beams on a higher-order Poincaré sphere (HOPS) via a single-layer all-silicon metasurface. The device is compact and capable of detecting optical singularities and higher-order Stokes parameters simultaneously through a single intensity measurement. To verify the validity of the proposed metadevice, different beams on HOPS 0 , 0 and HOPS 1 , − 1 are illuminated on the metadevices. The beams are fully resolved, and the reconstructed higher-order Stokes parameters show good agreement with the original ones. Taking the signal-to-noise ratio into account, the numerical simulations indicate that the design strategy can be extended to fully resolve arbitrary beams on HOPS with order up to 4. Because of the advantages of compact configuration and compatibility with current semiconductor technology, the metadevice will facilitate potential applications in information processing and optical communications.

Computing metasurface capable of broad-band switchable anisotropic edge-enhanced imaging

“…[21][22][23][24][25] They can replace several bulky traditional optical components to achieve various optical functions and allow light to be precisely regulated in the sub-wavelength thickness range. These potentials have pushed metasurfaces into different research areas, such as investigating the spin Hall effect, 26,27 tailoring multiple vortex beams, [28][29][30] metalenses 31,32 and metaholograms. [33][34][35] Meanwhile, a variety of functional imaging techniques based on metasurfaces, 36,37 like polarization imaging, 38,39 spectral imaging, 40,41 and isotropic edge detection, 18,27,[42][43][44] are all attractive.…”

Noninterleaved Metasurface for Full‐Polarization Three‐Dimensional Vectorial Holography

“…[1][2][3] Owing to the unprecedented wavefront shaping capabilities beyond conventional bulky optical elements and ease of manufacturing, metasurfaces promise to be excellent platforms for compact planar optical devices. [4,5] To date, metasurfaces have been explored to design a variety of meta-devices, such as metalenses, [6][7][8][9] structured light generators, [10][11][12][13] thermal emitters, [14] polarimeters, [15][16][17][18] and so forth. The metasurface platform has also revolutionized conventional holography with high resolution, ultra-thin thickness, high performance, and extraordinary functionalities, resulting in promising applications including augmented and virtual reality, information storage, and encryption.…”

Generation of vector beams with different polarization singularities based on metasurfaces

“…Typically, two orthogonal circularly polarized beams are often utilized to form one vector beam. Many generation techniques have been developed in parallel to realize the superposition of circularly polarized states, and they include forked gratings [12], cylindrical lenses [13], spiral phase plate [14], q-plate [15], spatial light modulator [16,17] and optical metasurface [18][19][20][21][22][23][24][25].…”