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. In addition, we use quantum state tomography to indicate higher-dimensional entanglement in terms of BG modes.
Reference:
McLaren, M, Agnew, M, Leach, J, Roux, FS, Padgett, MJ, Boyd, RW and Forbes, A. Entangled Bessel-Gaussian beams. Optics Express, vol. 20(21), pp 23589-23597
McLaren, M., Agnew, M., Leach, J., Roux, F., Padgett, M., Boyd, R., & Forbes, A. (2012). Entangled Bessel-Gaussian beams. http://hdl.handle.net/10204/6333
McLaren, M, M Agnew, J Leach, FS Roux, MJ Padgett, RW Boyd, and A Forbes "Entangled Bessel-Gaussian beams." (2012) http://hdl.handle.net/10204/6333
McLaren M, Agnew M, Leach J, Roux F, Padgett M, Boyd R, et al. Entangled Bessel-Gaussian beams. 2012; http://hdl.handle.net/10204/6333.
Copyright: 2012 Optical Society of America. This is an ABSTRACT ONLY. The definitive version is published in the Journal of Optics Express, vol.20(21), pp 23589-23597
