Prof. Mohamed Babiker Profile

Prof. Mohamed Babiker

Professor of Physics at Univ of York

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Publications (8)

Proceedings Article | 25 August 2015 Paper

C-shaped electron beams: design, experimental production and application

M. Mousley, G. Thirunavukkarasu, M. Babiker, J. Yuan

Proceedings Volume 9581, 95810C (2015) https://doi.org/10.1117/12.2187859

KEYWORDS: Electron beam lithography, Aluminum, Electron beams, Metamaterials, Transmission electron microscopy, Spatial frequencies, Holography, Photomasks, Electroluminescent displays, Product engineering

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Proceedings Article | 17 February 2011 Paper

Optical vortex singularities and atomic circulation in evanescent waves

V. Lembessis, D. Andrews, M. Babiker, S. Al-Awfi

Proceedings Volume 7950, 795007 (2011) https://doi.org/10.1117/12.874926

KEYWORDS: Chemical species, Surface plasmons, Optical vortices, Dielectrics, Plasmonics, Spiral phase plates, Reflection, Sodium, Physics, Optical tweezers

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Proceedings Article | 11 May 2010 Paper

Small scale de-excitation and entanglement near surfaces in open cavity quantum optics

M. Babiker, S. Skipsey

Proceedings Volume 7712, 771212 (2010) https://doi.org/10.1117/12.854956

KEYWORDS: Quantum computing, Optical manipulation, Chemical species, Physics, Quantum optics, Electromagnetism, Image processing, Dielectrics, Quantum information, Free space

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Proceedings Article | 8 September 2006 Open Access

Modeling quantum optical processes, interference, and correlations in novel microstructures

S. Skipsey, M. Babiker, M. Al-Amri, G. Juzeliunas

Proceedings Volume 6328, 63280U (2006) https://doi.org/10.1117/12.679007

KEYWORDS: Dielectrics, Electromagnetism, Process modeling, Quantum dots, Process control, Quantum information processing, Mirrors, Metals, Interfaces, Quantum optics

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The properties of localised dipole emitters in the form of a quantum dot or a colour centre embedded in a crystal environment can be drastically modified by a change in the composition, size and shape of the environment in which the emitter is embedded. Thanks to recent advances in material deposition techniques and lithography, as well as the advances in detection techniques and optical manipulation, experimental work is now capable of revealing a new range of physical phenomena when the typical dimensions are of the order of an optical dipole transition wavelength and below. These advances have arisen at a time of a heightened research effort devoted to the important goal of identifying a qubit and a suitable environment that forms the basis for a scalable hardware architecture for the practical realisation of quantum information processing. A physical system that we have recently put forward as a candidate for such a purpose involves localised emitters in the form of quantum dots or colour centres embedded in a nanocrystal. This suggestion became more persuasive following the success of experiments which, for the first time, were able to demonstrate quantum cryptography using a nitrogen vacancy in a diamond nanocrystal as a single-photon source. It has, however, been realised that a more versatile scenario could be achieved by making use of the interplay between dielectric cavity confinement and dipole orientation. Besides position dependence the main properties exhibit strong dipole orientational dependece suggesting that the system is a possible candidate as a qubit for a scalable hardward architecture for quantum information processing. Cavity confinement can control processes since it can lead to the enhancement and the complete suppression of the de-excitation process, with further control provided by the manipulation of the dipole orientation by optical means. This article is concerned with the modelling of quantum processes for quantum systems localised in artificially fabricated structures made of high conductivity metals and dielectric cavities. The essential features of cavity field confinement in this context are presented and the effects on de-excitation rates are assessed.

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Proceedings Article | 9 February 2006 Paper

Transient optical angular momentum effects and atom trapping in multiple twisted beams

D. Andrews, A. Carter, M. Babiker, M. Al-Amri

Proceedings Volume 6131, 613103 (2006) https://doi.org/10.1117/12.647412

KEYWORDS: Chemical species, Ions, Europium, Magnesium, Beam propagation method, Matrices, Chemical elements, Physics, Molecules, Laser applications

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Proceedings Article | 14 March 2005 Paper

Interaction of Laguerre-Gaussian light with liquid crystals

Luciana Davila Romero, Andrew Carter, Mohamed Babiker, David Andrews

Proceedings Volume 5736, (2005) https://doi.org/10.1117/12.585295

KEYWORDS: Liquid crystals, Optical vortices, Differential equations, Spiral phase plates, Molecules, Paraxial approximations, Glasses, Dielectrics, Molecular interactions, Physics

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Proceedings Article | 2 August 2004 Paper

The interaction of optical vortices with chiral matter

David Andrews, Mohamed Babiker, Andrew Carter, Luciana Davila Romero

Proceedings Volume 5508, (2004) https://doi.org/10.1117/12.556362

KEYWORDS: Magnetism, Optical vortices, Liquid crystals, Molecules, Spiral phase plates, Polarization, Molecular interactions, Spectroscopy, Dichroic materials, Absorption

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Proceedings Article | 1 November 2002 Paper

Nonlinear spectroscopy with twisted beams

David Andrews, Mohamed Babiker, Colin Bennett, Luciana Davila-Romero

Proceedings Volume 4812, (2002) https://doi.org/10.1117/12.451377

KEYWORDS: Polarization, Second-harmonic generation, Spectroscopy, Sum-frequency generation, Molecules, Photon polarization, Radio propagation, Electromagnetism, Beam propagation method, Nonlinear optics

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Showing 5 of 8 publications

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