Now showing items 1-10 of 10

  • Dynamic size tuning of multidimensional optically bound matter 

    Brzobohaty, Oto; Karasek, Vitezslav; Cizmar, Tomas; Zemanek, Pavel (2011-09) - Journal article
    We generate and dynamically control one-, two- and three-dimensional optically bound structures of soft matter in the geometry of counter-propagating incoherent laser beams. We report results for the Bessel, Gaussian, and ...
  • Exploiting multimode waveguides for pure fibre based fluorescence imaging 

    Cizmar, Tomas; Dholakia, Kishan (SPIE, 2013-03-22) - Conference item
    There has been an immense drive in modern microscopy towards miniaturisation and fibre based technology. This has been necessitated by the need to access hostile or difficult environments particularly in-situ and in-vivo. ...
  • Exploiting multimode waveguides for pure fibre-based imaging 

    Cizmar, Tomas; Dholakia, Kishan (2012-08-28) - Journal article
    There has been an immense drive in modern microscopy towards miniaturisation and fibre based technology. This has been necessitated by the need to access hostile or diffcult environments in-situ and in-vivo. Strategies to ...
  • Interference-free superposition of nonzero order light modes : Functionalized optical landscapes 

    Cizmar, Tomas; Dalgarno, Heather Isla Campbell; Ashok, Praveen Cheriyan; Gunn-Moore, Frank J; Dholakia, Kishan (2011-02) - Journal article
    In this paper, we utilize the incoherent superposition of nonzero order light modes. We show that this approach brings an additional degree of freedom to the generation of optical fields and notably the formation of ...
  • Light-sheet microscopy using an Airy beam 

    Vettenburg, Tom; Dalgarno, Heather Isla Campbell; Nylk, Jonathan; Coll-Lladó, Clara; Ferrier, David Ellard Keith; Cizmar, Tomas; Gunn-Moore, Frank J; Dholakia, Kishan (2014-05) - Journal article
    Light-sheet microscopy facilitates rapid, high-contrast, volumetric imaging with minimal sample exposure. However, the rapid divergence of a traditional Gaussian light sheet restricts the field of view (FOV) that provides ...
  • Numerical investigation of passive optical sorting of plasmon nanoparticles 

    Ploschner, Martin; Mazilu, Michael; Cizmar, Tomas; Dholakia, Kishan (2011-07-06) - Journal article
    We explore the passive optical sorting of plasmon nanoparticles and investigate the optimal wavelength and optimal beam shape of incident field. The condition for optimal wavelength is found by maximising the nanoparticle ...
  • Shaping the light transmission through a multimode optical fibre : complex transformation analysis and applications in biophotonics 

    Cizmar, Tomas; Dholakia, Kishan (2011-09-14) - Journal article
    We present a powerful approach towards full understanding of laser light propagation through multimode optical fibres and control of the light at the fibre output. Transmission of light within a multimode fibre introduces ...
  • Spatially optimized gene transfection by laser-induced breakdown of optically trapped nanoparticles 

    Arita, Yoshihiko; Torres-Mapa, Maria Leilani; Lee, Woei Ming; Cizmar, Tomas; Campbell, Paul A; Gunn-Moore, Frank J; Dholakia, Kishan (2011-03) - Journal article
    We demonstrate laser-induced breakdown of an optically trapped nanoparticle with a nanosecond laser pulse. Controllable cavitation within a microscope sample was achieved, generating shear stress to monolayers of live ...
  • Speed enhancement of multi-particle chain in a traveling standing wave 

    Siler, Martin; Cizmar, Tomas; Zemanek, Pavel (2012-01) - Journal article
    A moving array of optical traps created by interference of two counter-propagating evanescent waves has been used for delivery of particle chains up to 18 micro-particles long immersed in water. The particles were optically ...
  • Wavefront corrected light sheet microscopy in turbid media 

    Dalgarno, Heather Isla Campbell; Cizmar, Tomas; Vettenburg, Tom; Nylk, Jonathan; Gunn-Moore, Frank J; Dholakia, Kishan (2012-05) - Journal article
    Light sheet microscopy is a powerful method for three-dimensional imaging of large biological specimens. However, its imaging ability is greatly diminished by sample scattering and aberrations. Optical clearing, Bessel ...