5 papers
Optimizing achromaticity in metalenses, and development of a layered thin-film metalens
Calvin M. Hooper, Sarah E. Bohndiek, Calum Williams
Metalenses are ultrathin optical devices designed to replicate behavior of conventional refractive lenses, or lens arrays, utilizing nanoscale resonant structures to redirect incid…
Development of a blood oxygenation phantom for photoacoustic tomography combined with online pO2 detection and flow spectrometry
Marcel Gehrung, Sarah Bohndiek, Joanna Brunker
Photoacoustic tomography (PAT) is intrinsically sensitive to blood oxygen saturation (sO2) in vivo. However, making accurate sO2 measurements without knowledge of tissue- and instr…
Characterising optical fibre transmission matrices using metasurface reflector stacks for lensless imaging without distal access
George S. D. Gordon, Milana Gataric, Alberto Gil C. P. Ramos +5
The ability to form images through hair-thin optical fibres promises to open up new applications from biomedical imaging to industrial inspection. Unfortunately, deployment has bee…
Grayscale-to-color: Single-step fabrication of bespoke multispectral filter arrays
Calum Williams, George S. D. Gordon, Sophia Gruber +2
Conventional cameras, such as in smartphones, capture wideband red, green and blue (RGB) spectral components, replicating human vision. Multispectral imaging (MSI) captures spatial…
Quantitative phase and polarisation endoscopy applied to detection of early oesophageal tumourigenesis
George S. D. Gordon, James Joseph, Maria P. Alcolea +9
Phase and polarisation of coherent light are highly perturbed by interaction with microstructural changes in pre-malignant tissue, holding promise for label-free early cancer detec…