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Browsing by Author "McLaren, M"

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  • Dudley, Angela L; Mafu, M; Goyal, S; Giovannini, D; McLaren, M; Konrad, T; Padgett, MJ; Petruccione, F; Lutkenhaus, N; Forbes, A (2013-07)
    We encode mutually unbiased bases (MUBs) using the higher-dimensional orbital angular momentum (OAM) degree of freedom associated with optical fields. We illustrate how these states are encoded with the use of a spatial ...
  • McLaren, M; Agnew, M; Leach, J; Roux, FS; Padgett, MJ; Boyd, RW; Forbes, A (Optical Society of America, 2012-10)
    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 ...
  • McLaren, M; Roux, FS; Forbes, A (SAIP, 2012-07)
    This presentation highlights the increasing interest in quantum and high dimensional entanglement.
  • Mafu, M; Dudley, Angela L; Goyal, S; Giovannini, D; McLaren, M; Padgett, MJ; Konrad, T; Petruccione, F; Lutkenhaus, N; Forbes, A (American Physical Society, 2013-09)
    We present an experimental study of higher-dimensional quantum key distribution protocols based on mutually unbiased bases, implemented by means of photons carrying orbital angular momentum. We perform (d + 1) mutually ...
  • Hamadou Ibrahim, A; Roux, FS; McLaren, M; Forbes, A; Konrad, T (2013-06)
    This is a power point presentation questioning the feasablility of free space quantum communication with the OAM state of light. Presented June 2013
  • McLaren, M; Khanyile, T; Mthunzi, P; Forbes, A (Optical Society of America, 2013-04)
    We outline the possibility of optical trapping and tweezing with Super-Gaussian beam profiles. We show that the trapping strength can be tuned continuously by adjusting the order of a Super-Gaussian beam, approaching that ...
  • Hamadou Ibrahim, A; Roux, FS; McLaren, M; Konrad, T; Forbes, A (American Physical Society, 2013-06)
    The turbulence-induced decay of orbital-angular-momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our resultswith previouswork,we simulate the turbulent atmosphere ...
  • Bruning, R; Zhang, Y; McLaren, M; Duparre, M; Forbes, A (2015-09)
    We investigated the overlap relation of the free-space Laguerre–Gaussian modes to the corresponding linearly polarized modes of a step-index fiber. To maximize the overlap for an efficient coupling of the free-space modes ...
  • McLaren, M; Romero, J; Giovannini, D; Galvez, EJ; Padgett, MJ; Forbes, A (2013-07)
    Typically, a Gaussian mode is used to pump a non-linear crystal to produce pairs of entangled photons. We demonstrate orbital angular momentum (OAM) entanglement when a non-fundamental mode is used to pump a non-linear ...
  • Zhang, Y; Roux, FX; McLaren, M; Forbes, A (American Physical Society, 2014)
    The radial degrees of freedom of the biphoton states that are produced in spontaneous parametric down-conversion (SPDC) in the Laguerre-Gaussian (LG) basis are investigated, theoretically and experimentally. We calculated ...
  • McLaren, M; Mhlanga, T; Padgett, MJ; Roux, FS; Forbes, A (Nature Publishing Group, 2014-02)
    Quantum entanglement between photon pairs is fragile and can easily be masked by losses in transmission path and noise in the detection system. When observing the quantum entanglement between the spatial states of photon ...
  • Zhang, Y; McLaren, M; Roux, FS; Forbes, A (SPIE, 2014-08)
    We present a simple way of simulating Spontaneous parametric down-conversion (SPDC) by modulating a classical laser beam with two spatial light modulators (SLM) through a back projection setup. This system has the advantage ...
  • Agnew, M; Leach, J; McLaren, M; Roux, FS; Boyd, RW (American Physical Society, 2011-12)
    Systems entangled in high dimensions have recently been proposed as important tools for various quantum information protocols, such as multibit quantum key distribution and loophole-free tests of nonlocality. It is therefore ...
  • McLaren, M; Romero, J; Padgett, MJ; Roux, FS; Forbes, A (American Physical Society, 2013-09)
    In this paper we consider geometrical two-photon optics of Bessel-Gaussian modes generated in spontaneous parametric down-conversion of a Gaussian pump beam. We provide a general theoretical expression for the orbital ...