165 citations · 483 across the 8 of their papers we have counts for
8 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…
Automated real-time spectral characterization of phase-change tunable optical filters using a linear variable filter and infrared camera
David Bombara, Calum Williams, Stephen Borg +1
Actively tunable optical filters based on chalcogenide phase-change materials (PCMs) are an emerging technology with applications across chemical spectroscopy and thermal imaging.…
PCM-net: A refractive index database of chalcogenide phase change materials for tunable nanophotonic device modelling
Hyun Jung Kim, Jung-woo Sohn, Nina Hong +2
Recently, chalcogenide glass based phase change materials (PCMs) have shown utility as a tuning material for a range of nanophotonic devices. Owing to their low loss, ultrafast swi…
Tunable mid-wave infrared Fabry-Perot bandpass filters using phase-change GeSbTe
Calum Williams, Nina Hong, Matthew Julian +2
We demonstrate spectrally-tunable Fabry-Perot bandpass filters operating across the MWIR by utilizing the phase-change material GeSbTe (GST) as a tunable cavity medium between two…
All-optical continuous tuning of phase-change plasmonic metasurfaces for multispectral thermal imaging
Matthew N. Julian, Calum Williams, Stephen Borg +2
Actively tunable, narrowband spectral filtering across arbitrary optical wavebands is highly desirable in a plethora of applications, from chemical sensing, hyperspectral imaging t…
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…