Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
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TLDR
An optical process in which the spin angular momentum carried by a circularly polarized light beam is converted into orbital angular momentum, leading to the generation of helical modes with a wave-front helicity controlled by the input polarization is demonstrated.Abstract:
We demonstrate experimentally an optical process in which the spin angular momentum carried by a circularly polarized light beam is converted into orbital angular momentum, leading to the generation of helical modes with a wave-front helicity controlled by the input polarization. This phenomenon requires the interaction of light with matter that is both optically inhomogeneous and anisotropic. The underlying physics is also associated with the so-called Pancharatnam-Berry geometrical phases involved in any inhomogeneous transformation of the optical polarization.read more
Citations
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Multichannel Metasurface for Simultaneous Control of Holograms and Twisted Light Beams
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Multidimensional entanglement transport through single-mode fiber
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Entangled vector vortex beams
Vincenzo D'Ambrosio,Vincenzo D'Ambrosio,Gonzalo Carvacho,Francesco Graffitti,Chiara Vitelli,B. Piccirillo,Lorenzo Marrucci,Fabio Sciarrino +7 more
TL;DR: In this article, the authors combine these two concepts and demonstrate the generation of quantum entanglement between two photons that are both in VV states, which may lead to quantum-enhanced applications of VV beams as well as to quantum information protocols fully exploiting the vectorial features of light.
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Measuring the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams
Giovanni Milione,Angela Dudley,Thien An Nguyen,Ougni Chakraborty,Ebrahim Karimi,Andrew Forbes,Andrew Forbes,Robert R. Alfano +7 more
TL;DR: In this article, the authors experimentally measured the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams using a digital version of Durnin's method, using a spatial light modulator and a liquid crystal q-plate.
References
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TL;DR: Laser light with a Laguerre-Gaussian amplitude distribution is found to have a well-defined orbital angular momentum and an astigmatic optical system may be used to transform a high-order LaguERre- Gaussian mode into aHigh-order Hermite-Gaussia mode reversibly.
Journal ArticleDOI
Free-space information transfer using light beams carrying orbital angular momentum
Graham M. Gibson,Johannes Courtial,Miles J. Padgett,Mikhail V. Vasnetsov,V. A. Pas’ko,Stephen M. Barnett,Sonja Franke-Arnold +6 more
TL;DR: The transfer of information encoded as orbital angular momentum states of a light beam is demonstrated, which is resistant to eavesdropping and gives an experimental insight into the effects of aperturing and misalignment of the beam on the OAM measurement and demonstrates the uncertainty relationship for OAM.
Journal ArticleDOI
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Direct Observation of Transfer of Angular Momentum to Absorptive Particles from a Laser Beam with a Phase Singularity
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