J Roy Sambles FRS FinstP
Abstract: Taking little other than common cuticle, loaded with a small amount of melanin, butterflies have evolved some stunning metasurfaces. Often only microns thick, these act as selective reflectors and polarizers as well as being sometimes very strong scatterers (white) or very strong absorbers (black) of electromagnetic radiation. Similarly surface structured metals, metasurfaces, can lead to unexpected effects: for example selective absorption, even at long wavelengths where metals are expected to behave as almost perfect mirrors, or even, perhaps more remarkably, negative refraction.
Lectures held at 6.30pm, Franklin Room, Institute of Physics HQ, 80 Portland Place, London, W1B 1NT. Refreshments are served from 6pm on the day of the lecture. Please register below to attend lectures.