title: Nanostructured holograms for broadband manipulation of vector beams.
abstract: We report a new type of holographic interface, which is able to manipulate the three fundamental properties of light (phase, amplitude, and polarization) over a broad wavelength range. The design strategy relies on replacing the large openings of conventional holograms by arrays of subwavelength apertures, oriented to locally select a particular state of polarization. The resulting optical element can therefore be viewed as the superposition of two independent structures with very different length scales, that is, a hologram with each of its apertures filled with nanoscale openings to only transmit a desired state of polarization. As an implementation, we fabricated a nanostructured holographic plate that can generate radially polarized optical beams from circularly polarized incident light, and we demonstrated that it can operate over a broad range of wavelengths. The ability of a single holographic interface to simultaneously shape the amplitude, phase, and polarization of light can find widespread applications in photonics.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: Jiao
authors.initials: J
authors.lastname: Lin
authors.forename: Patrice
authors.initials: P
authors.lastname: Genevet
authors.forename: Mikhail A
authors.initials: MA
authors.lastname: Kats
authors.forename: Nicholas
authors.initials: N
authors.lastname: Antoniou
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso
mesh_terms: D006696:Holography / Q000379:methods*; D008027:Light; D049329:Nanostructures / Q000737:chemistry*; D055095:Optics and Photonics; D012031:Refractometry; D012542:Scattering, Radiation