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  • Tshabalala, Lerato C; Ntuli, CP; Fwamba, JC; Popoola, P; Pityana, Sisa L (Elsevier, 2017-01)
    Femtosecond laser surface micromachining is a technique in which an ultrashort pulse laser beam is focused to dimensions of a few microns inside or on the surface of the substrate. In this paper, surface texture transformation ...
  • Akinlabi, ET; Nyembwe, KD; Pityana, Sisa L; Shongwe, MB; Ochonogor, OF (Elsevier, 2017-01)
    Manufacture of hybrid Ti6Al4 V alloy systems for application specifically in hot parts of turbine engines has been a challenge in recent years. This is due to the need to increase efficiency and reduce combustion rate and ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (Wiley, 2017-01)
    Human immunodeficiency virus (HIV-1) infection remains a major health problem despite the use of highly active antiretroviral therapy (HAART), which has greatly reduced mortality rates. Due to the unavailability of an ...
  • Maphanga, Charles P; Malabi, Rudzani; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-02)
    The delivery of genetic material and drugs into mammalian cells using femtosecond (fs) laser pulses is escalating rapidly. This novel light based technique achieved through a precise focusing of a laser beam on the plasma ...
  • Malabi, Rudzani; Manoto, Sello L; Maaza, M; Mthunzi-Kufa, Patience; Ombinda-Lemboumba, Saturnin (2017-01)
    The objectives of this study are to use femtosecond laser pulses in a photo-translocation system to deliver ARVs into HIV infected TZMbl cells, and to investigate the influence of ARVs and laser on cellular processes using ...
  • Ombinda-Lemboumba, Saturnin; Malabi, Rudzani; Lugongolo, Masixole Y; Thobakgale, Setumo L; Manoto, Sello L; Mthunzi-Kufa, Patience (SPIE, 2017-02)
    Optical trapping has emerged as an essential tool for manipulating single biological material and performing sophisticated spectroscopy analysis on individual cell. The optical trapping technique has been used to grab and ...
  • Ndou, N; Akinlabi, ET; Pityana, Sisa (2016-10)
    The influence of laser power on the deposited of Ti64l4V/W composites was investigated. The energy flow rates were varied while every single other parameter were kept at a steady. The evolving microstructure and the hardness ...
  • Tshabalala, LC; Pityana, Sisa (Elsevier, 2016-03)
    Traditional abrasive techniques such as grinding and lapping have long been used in the surface conditioning of engineering materials. However, in the processing of hard and brittle materials like silicon nitride ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-01)
    Human immunodeficiency virus (HIV-1) infection remains a major health problem despite the use of highly active antiretroviral therapy (HAART), which has greatly reduced mortality rates. Due to the unavailability of an ...
  • Malabi, Rudzani; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Maaza, M; Mthunzi-Kufa, Patience (SPIE, 2017-01)
    The current human immunodeficiency virus (HIV) treatment regime possesses the ability to diminish the viral capacity to unnoticeable levels; however complete eradication of the virus cannot be achieved while latent HIV-1 ...
  • Rosales-Guzmán, C; Trichili, A; Dudley, Angela L; Ndagano, B; Salem, AB (Optical Society of America (OSA), 2016-10)
    By combining both the azimuthal and radial components of Laguerre-Gaussian modes with wavelength division multiplexing, we generated >100 information channels. We implemented a laboratory free-space link using 35 ...
  • Naidoo, Darryl; Roux, FS; Dubery, Angela L; Litvin, Ihar; Piccirillo, B (Optical Society of America (OSA), 2016-10)
    We introduce a laser for generating all states on the Higher-order Poincaré sphere by coupling spin angular momentum to orbital angular momentum and we demonstrate that the OAM degeneracy of a laser may be broken.
  • Maweza, Elijah L; Gailele, Lucas M; Strauss, Hencharl J; Litvin, Ihar; Forbes, A; Dudley, Angela L (Optical Society of America (OSA), 2016-10)
    We demonstrate the operation and calibration of a spatial light modulator in the mid-IR region by creating and measuring the modal content and wavefront of structured light fields at 2um for the first time.
  • Sephton, Bereneice C; Dudley, Angela L; Forbes, A (Optical Society of America (OSA), 2016-10)
    Q-plates are commonly used for uncomplicated generation of polarization controlled vortex beams. Here we show experimentally that the output is not a pure vortex but rather a Hypergeometric-Gaussian mode. Results are in ...
  • Dudley, Angela L; Naidoo, Darryl; Forbes, A (SPIE, 2016-09)
    We show how one can determine the various properties of light, from the modal content of laser beams to decoding the information stored in optical fields carrying orbital angular momentum, by performing a modal decomposition. ...
  • Bell, Teboho; Ngcobo, Sandile (2016-07)
    In this paper we demonstrate the output power amplification of the generated higher-order modes from a digital laser by using an extra-cavity Nd: YAG amplifier.
  • Bell, Teboho; Haddadi, S; Ait-Ameur, K; Forbes, A; Ngcobo, Sandile (2015-07)
    This poster discusses the generation of Radial Laguerre-Gaussian modes with a lower threshold using a digital laser.
  • Bell, Teboho; Ngcobo, Sandile; Haddadi, S; Ait-Ameur, K; Forbes, A (2015-07)
    Using the digital laser one can generate various types of modes, like, Laguerre-Gaussian modes. The digital laser was forced to generate high-order radial Laguerre-Gaussian modes, LGp , with zero azimuthal order, by loading ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Mthunzi-Kufa, Patience (Optical Society of America (OSA), 2016-10)
    HIV-1 epidemic remains a major health challenge. This study explores the effects of low level laser therapy on HIV-1 infected cells. Infection is reduced by irradiation and the mechanism needs to be investigated further.
  • Bell, Teboho; Forbes, A; Ngcobo, Sandile (2015-10)
    The solid state digital laser was used in generation of Laguerre-Gaussian modes, LGpl, of different orders. This work demonstrates that we can generate high-order Laguerre-Gaussian modes with high purity using a digital laser.

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