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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Journal ArticleDOI
Arbitrary spin-to–orbital angular momentum conversion of light
TL;DR: A metasurface converter for optical states that transforms polarization states into optical angular momentum states and illustrates a general material-mediated connection between SAM and OAM of light and may find applications in producing complex structured light and in optical communication.
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Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface
Ebrahim Karimi,Sebastian A. Schulz,Israel De Leon,Hammam Qassim,Jeremy Upham,Robert W. Boyd,Robert W. Boyd +6 more
TL;DR: Karimi et al. as mentioned in this paper showed that a plasmonic metasurface comprising an array of nano-antennas can couple spin-to-orbital angular momentum at thickness much smaller than the wavelength of the light with an efficiency of around 3%.
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Roadmap on structured light
Halina Rubinsztein-Dunlop,Andrew Forbes,Michael V Berry,Mark R. Dennis,David L. Andrews,Masud Mansuripur,Cornelia Denz,Christina Alpmann,Peter Banzer,Thomas Bauer,Ebrahim Karimi,Lorenzo Marrucci,Miles J. Padgett,Monika Ritsch-Marte,Natalia M. Litchinitser,Nicholas P. Bigelow,Carmelo Rosales-Guzmán,Aniceto Belmonte,Juan P. Torres,Tyler W. Neely,Mark Baker,Reuven Gordon,Alexander B. Stilgoe,Jacquiline Romero,Andrew White,Robert Fickler,Alan E. Willner,Guodong Xie,Benjamin J. McMorran,Andrew M. Weiner +29 more
TL;DR: In this paper, the key fields within structured light from the perspective of experts in those areas, providing insight into the current state and the challenges their respective fields face, as well as the exciting prospects for the future that are yet to be realized.
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Orbital angular momentum 25 years on [Invited]
TL;DR: A brief review of the research in the field to date is examined and what future directions might hold is considered.
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Catenary optics for achromatic generation of perfect optical angular momentum
Mingbo Pu,Xiong Li,Xiaoliang Ma,Yanqin Wang,Zeyu Zhao,Changtao Wang,Chenggang Hu,Ping Gao,Cheng Huang,Haoran Ren,Xiangping Li,Fei Qin,Jing Yang,Min Gu,Minghui Hong,Xiangang Luo +15 more
TL;DR: 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.
References
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Book
The physics of liquid crystals
P. G. de Gennes,Richard Alben +1 more
TL;DR: In this paper, the authors define an order parameter statistical theories of the nematic order phenomonological description of the nematic-isotopic mixtures and describe the properties of these mixtures.
Journal ArticleDOI
Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes.
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
Dislocations in wave trains
John F. Nye,Michael V Berry +1 more
TL;DR: In this paper, it was shown that dislocations are to be expected whenever limited trains of waves, ultimately derived from the same oscillator, travel in different directions and interfere -for example in a scattering problem.
Journal ArticleDOI
Direct Observation of Transfer of Angular Momentum to Absorptive Particles from a Laser Beam with a Phase Singularity
TL;DR: Black or reflective particles can be trapped in the dark central minimum of a doughnut laser beam produced using a high efficiency computer generated hologram to carry angular momentum transferred from the central phase singularity beam.