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Exploiting multimode waveguides for pure fibre-based imaging
TLDR
A novel approach is presented by utilizing disordered light within a standard multimode optical fibre for lensless microscopy and optical mode conversion and showing how such control can realize a new form of mode converter and generate various types of advanced light fields such as propagation-invariant beams and optical vortices.
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Seeing through chaos in multimode fibres
The prediction of light propagation up to hundreds of millimetres within straight or even deformed segments of multimode fibres is demonstrated. The concept is applied in an endoscope and exceptional…
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Light-sheet microscopy using an Airy beam
TLDR
It is shown that the Airy beam innately yields high contrast and resolution up to a tenfold larger FOV, and its characteristic asymmetric excitation pattern results in all fluorescence contributing positively to the contrast, enabling a step change for light-sheet microscopy.
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Experimental demonstration of optical transport, sorting and self arrangement using a "tractor beam"
We demonstrate experimentally the principle of a ”tractor beam” where a microobject is pulled against the photons flow. We show that this geometry and method can be used to delivery several…
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Shaping the light transmission through a multimode optical fibre: complex transformation analysis and applications in biophotonics.
TLDR
It is shown that using this approach one can generate an arbitrary output optical field within the accessible field of view and range of spatial frequencies given by fibre core diameter and numerical aperture, respectively, that contains over 80% of the total available power.
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High-fidelity multimode fibre-based endoscopy for deep brain in vivo imaging
TLDR
This study designs a compact and high-speed system for fluorescent imaging at the tip of a fibre, achieving a resolution of 1.18 ± 0.04 µm, and demonstrates in vivo observations of cell bodies and processes of inhibitory neurons within deep layers of the visual cortex and hippocampus of anaesthetised mice.
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Optical forces generated by evanescent standing waves and their usage for sub-micron particle delivery
Recently a non-contact organization of sub-micron colloidal particles in the vicinity of liquid–solid interface attracted great attention in connection with the development of imaging techniques…
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Shaping the future of manipulation
Optical forces can be used to manipulate biological and colloidal material in a non-contact manner. This forms the foundation of a wealth of exciting science, particularly in the fields of physics,…
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High quality quasi-Bessel beam generated by round-tip axicon.
TLDR
This work shows how the spatial filtration of the beam in the Fourier plane improves this spatial beam distribution and removes the undesired intensity modulation of the quasi-Bessel beam.
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Propagation characteristics of Airy beams: dependence upon spatial coherence and wavelength.
TLDR
A broadband "white light" Airy beam is generated and the dependence of the beam properties on wavelength is characterized by extending the Gaussian-Schell model to describe the effect of spatial coherence on the propagation of Airy beams.
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