MCN is delighted to welcome ANFF-VIC Tech Ambassador, Prof Ken Crozier and members of his team to discuss recent investigations into light-matter interactions.
Ken will be joined by Benjamin Craig, Vivek Raj Shrestha, Ming Ye, and Jasper Cadusch as they delve into four of the team’s projects.
Abstract:
We provide glimpses into four research projects of the Crozier Group, whose common theme is engineering light-matter interactions at the nanoscale.
In the first, we demonstrate mid-infrared plasmonic filters. We experimentally determine the spectrum of a mid-infrared light source using an algorithm whose inputs are the total power transmitted by each filter and the transmission spectrum of each filter.
In the second, we demonstrate a graphene-metal metasurface for unpolarized long wavelength infrared light with electrically-tunable reflectance. By applying a gate voltage, we shift the wavelength of a resonant reflectance dip centered at ~9.4 micron by~156 nm.
In the third, we propose a hybrid metal/dielectric metasurface that functions as a mid-infrared magnetic mirror. It consists amorphous silicon cuboids on gold. The physical mechanism is explained by image theory. Measured reflection spectra agree with simulations.
In the fourth, we experimentally demonstrate a microspectrometer comprising twenty silicon photodetector pixels,whose responsivities are engineered via nanostructured fishnet patterns. We computationally reconstruct the spectrum of light that illuminates the chip from the measured pixel photocurrents.
