Spin-to-orbital angular momentum conversion in dielectric metasurfaces.

@article{Devlin2017SpintoorbitalAM,
  title={Spin-to-orbital angular momentum conversion in dielectric metasurfaces.},
  author={Robert C Devlin and Antonio Ambrosio and Daniel Wintz and Stefano Luigi Oscurato and Alexander Y. Zhu and Mohammadreza Khorasaninejad and Jaewon Oh and Pasqualino Maddalena and Federico Capasso},
  journal={Optics express},
  year={2017},
  volume={25 1},
  pages={
          377-393
        }
}
Vortex beams are characterized by a helical wavefront and a phase singularity point on the propagation axis that results in a doughnut-like intensity profile. These beams carry orbital angular momentum proportional to the number of intertwined helices constituting the wavefront. Vortex beams have many applications in optics, such as optical trapping, quantum optics and microscopy. Although beams with such characteristics can be generated holographically, spin-to-orbital angular momentum… 

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References

SHOWING 1-10 OF 54 REFERENCES

Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges

Orbital angular momentum associated with the helical phase-front of optical beams provides an unbounded “space” for both classical and quantum communications. Among the different approaches to

Achromatic orbital angular momentum generator

We describe a novel approach for generating light beams that carry orbital angular momentum (OAM) by means of total internal reflection in an isotropic medium. A continuous space-varying

Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface

Visible, circularly polarised light can be transformed into light-carrying orbital angular momentum by a plasmonic metasurface. That is the finding of Ebrahim Karimi and co-workers at the University

Spin-enabled plasmonic metasurfaces for manipulating orbital angular momentum of light.

This work shows experimentally the transverse angular splitting between the two spins in the reciprocal space with metasurface, as a direct observation of the optical spin Hall effect, and an associated global orbital rotation through the effective orientations of the geometric phase elements.

Tailoring Orbital Angular Momentum of Light in the Visible Domain with Metallic Metasurfaces

Submicron‐thick gold films endowed with subwavelength patterning allow on‐demand topological shaping of light, hence the precise delivery of optical orbital angular momentum. Several kinds of

Catenary optics for achromatic generation of perfect optical angular momentum

It is shown that the optical catenary can serve as a unique building block of metasurfaces to produce continuous and linear phase shift covering [0, 2π], a mission that is extremely difficult if not impossible for state-of-the-art technology.

Optical angular-momentum transfer to trapped absorbing particles.

Bringing together 44 landmark papers, "Optical Angular Momentum" offers the first comprehensive overview of the subject as it has developed and gives a definitive statement of the current status of all aspects of optical angular momentum.

Observation of the vortex structure of a non-integer vortex beam

An optical beam with an eilϕ phase structure carries an orbital angular momentum of lℏ per photon. For integer l values, the phase fronts of such beams form perfect helices with a single screw-phase

Flat optics with designer metasurfaces.

This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam.
...