Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
Reads0
Chats0
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
More filters
Journal ArticleDOI
Tunable orbital angular momentum generation in optical fibers.
TL;DR: The smooth variation of OAM from l=-1 to l=+1 by adjusting a polarizer at the output end of the fiber is experimentally demonstrated.
Journal ArticleDOI
Generation of integer and fractional vector beams with q-plates encoded onto a spatial light modulator
Ignacio Moreno,María del Mar Sánchez-López,Katherine Badham,Jeffrey A. Davis,Don M. Cottrell +4 more
TL;DR: This work generates programmable vector beams with arbitrary q-plates encoded using a spatial light modulator system that can analyze new and exotic q-plate designs without the difficulty of fabricating individual plates.
Journal ArticleDOI
Octave-wide supercontinuum generation of light-carrying orbital angular momentum
TL;DR: Raman solitons in OAM modes as well as the first supercontinuum spanning more than an octave, with the entire spectrum in the same polarization aswell as OAM state are demonstrated.
Journal ArticleDOI
Time-division multiplexing of the orbital angular momentum of light
TL;DR: An optical setup for generating a sequence of light pulses in which the orbital angular momentum (OAM) degree of freedom is correlated with the temporal one is presented and an "OAM-to-time conversion" apparatus that divides different input OAM states into different time bins is exhibited.
Journal ArticleDOI
Macroscopic direct observation of optical spin-dependent lateral forces and left-handed torques
TL;DR: In this article, the spin-dependent lateral displacements of centimetre-sized objects endowed with structured birefringence were observed with the naked eye, allowing structured light-matter interaction to move from a scientific curiosity to a new asset for the optical manipulation toolbox.
References
More filters
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.