Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"holographic optical tweezers"”.
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Enhanced transport through confined channels by stationary and fluctuating potentials
… microfluidic channels and colloidal particles. Holographic optical tweezers are used to modulate the potential energy landscape in those channels. We show how to extract the underlying energy potential by analysing local transition probabilities. Our method is applicable both to equilibrium …
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Optimal wavefronts and subwavelength structures : computer-aided design for optics and acoustics
… nanoscale, focusing on three types of devices: holographic optical tweezers, broadband solar absorbers, and acoustic waveguides. Much of the work presented is obtained using open source software tools. Advances in spatial wave modulation and nanomaterial fabrication technologies have created …
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Optical tweezers for signal detection and micromanipulation
… explores new multi-disciplinary applications of optical tweezers in the physical and biological sciences. Firstly, the three dimensional trapping of partially silvered sphere in a standard TEM00 optical trap was characterised. These spheres were then coated with an azo dye such that …
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High-speed video microscopy in optical tweezers
Optical tweezers have become an invaluable tool for measuring and exerting forces in the pico-Newton regime. Force measurements have in the past concentrated on using only one trapped particle as a probe, partly due to the difficulties in tracking more than one par- ticle at high enough frame rate. …
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Advanced fibre-based endoscopy for biophotonics applications
… over the past two decades, non-invasive optical imaging is still limited to penetration depths smaller than 1 mm into tissue. Multiple scattering caused by the refractive index inhomogeneities of biological matter rapidly distort any optical wavefront prop-agating through, rendering …
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Next Generation Phase-only LCOS Device with Ultra-low Phase Flicker for Holographic Applications
… devices have become one of the most promising optical engines for digital holographic applications. However, the system performance can be degraded by the instability of the phase levels, i.e., the so-called phase flicker. For instance, a large phase flicker means a low spatial information …
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Kinetics of Brownian Transport
… various contexts using a custom-built automated holographic optical tweezers (HOT) setup. More precisely, I investigate transition- and exit-path-time symmetries in equilibrium systems and demonstrate the breakdown of the symmetry in out-of-equilibriumsystems. Experimental data from folding …
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Applications of Optical Manipulation for Low Cost Implementation, Beam Shaping and Biophysical Force Measurements
… increasing number of these fields are turning to optical tweezers as a solution, owing to their high spatial and temporal resolution. Optical tweezers have the ability to quantitively exert and measure forces on the piconewton scale, a convenient force scale for soft biological materials, and are …