Chris E. Finlayson

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Deposition of semiconductors and metals from chemical precursors onto planar substrates is a well-developed science and technology for microelectronics. Optical fibers are an established platform for both communications technology and fundamental research in photonics. Here, we describe a hybrid technology that integrates key aspects of both engineering(More)
Self-phase modulation has been observed for ultrashort pulses of wavelength 800nm propagating through a 1 cm-long Ta2O5 rib waveguide. The associated nonlinear refractive index n2 was estimated to be 7.23x10-19 m2/W, which is higher than silica glass by more than one order of magnitude. Femtosecond time of flight measurements based on a Kerr shutter(More)
We demonstrate the production of high-quality polymer opal fibers in an industrially-scalable process. These fibers exhibit structural color, based on the self-assembly of sub-micron core-shell particles, with a spectrum which is stretch-tunable across the visible region. The internal substructure and ordering of fibers, as inferred from variations in(More)
A breakthrough in the fi eld of large area photonic structures is reported, based on permanent ordering of solid polymeric fi lms of sub-micrometer spheres by edge rotational-shearing. The resulting high-quality polymer opal thin-fi lms exhibit strikingly intense structural color, as confi rmed by combining a number of spectroscopic approaches. This induced(More)
Despite the availability of elaborate varieties of nanoparticles, their assembly into regular superstructures and photonic materials remains challenging. Here we show how flexible films of stacked polymer nanoparticles can be directly assembled in a roll-to-roll process using a bending-induced oscillatory shear technique. For sub-micron spherical(More)
We describe the formation of self-assembling nanoscale fibrillar aggregates from a hybrid system comprising a short polypeptide conjugated to the fluorophore fluorene. The fibrils are typically unbranched, approximately 7 nm in diameter, and many microns in length. A range of techniques are used to demonstrate that the spectroscopic nature of the(More)
The synthesis of metamaterials (periodically repeating, synthetic composite structures that are specifically designed to circumvent inconvenient bulk optical material properties) using micro/nanostructured scaffolds as templates is a powerful means to create 3D structures with appropriate nano-scale architecture. The merit of a particular template(More)
We report time-of-flight experiments on photonic-crystal waveguide structures using optical Kerr gating of a femtosecond white-light supercontinuum. These photonic-crystal structures, based on engineered silicon-nitride slab waveguides, possess broadband low-loss guiding properties, allowing the group velocity dispersion of optical pulses to be directly(More)
Despite numerous reports on the degradation properties and biological efficacy of bioresorbable polymer nanocomposites intended for use in orthopaedics, there is currently limited literature addressing their thermal and load-bearing properties, which are of central importance to the successful design of these nanocomposites. Here we demonstrate that the(More)
Hyperspectral goniometry reveals anisotropic scattering which dominates the visual appearance of self-assembled polymer opals. The technique allows reconstruction of the reciprocal-space of nanostructures, and indicates that chain defects formed during shear-ordering are responsible for the anisotropy in these samples. Enhanced scattering with improving(More)