Entangled Bessel-Gaussian beams.

Abstract

Orbital angular momentum (OAM) entanglement is investigated in the Bessel-Gaussian (BG) basis. Having a readily adjustable radial scale, BG modes provide an alternative basis for OAM entanglement over Laguerre-Gaussian modes. We show that the OAM bandwidth in terms of BG modes can be increased by selection of particular radial wavevectors and leads to a flattening of the spectrum, which allows for higher dimensionality in the entangled state. We demonstrate entanglement in terms of BG modes by performing a Bell-type experiment and showing a violation of the Clauser-Horne-Shimony-Holt inequality for the ℓ = ±1 subspace. In addition, we use quantum state tomography to indicate higher-dimensional entanglement in terms of BG modes.

DOI: 10.1364/OE.20.023589

Cite this paper

@article{Mclaren2012EntangledBB, title={Entangled Bessel-Gaussian beams.}, author={Melanie Mclaren and Megan Agnew and Jonathan Leach and Filippus S Roux and Miles J. Padgett and Robert W. Boyd and Andrew Forbes}, journal={Optics express}, year={2012}, volume={20 21}, pages={23589-97} }