Abstract
Journal of Vacuum Science and Technology 2013, 31, 06FE01
Switchable plasmon-induced transparency in gold nanoarrays on vanadium dioxide film
McGahan CL, Appavoo K, Haglund RF, Shapera EP
A proof-of-concept demonstration of switchable plasmon-induced transparency is presented in gold (Au) dolmen structures on a vanadium dioxide (VO2) thin film, The dolmen structures were made by a combination of high-resolution electron-beam lithography on VO2 films deposited by electron-beam evaporation. A 100nm (160 meV) modulation of the plasmon resonance of the dolmen structure due to the phase transition of the vanadium dioxide is observed, The plasmon resonance width is a factor 2-3 narrower than what was observed for Au nanodisks on a VO2 film in previous studies, due to the interference between the bright and dark modes of the plasmon structure. This experiment shows how one can combine a phase-change material with multielement plasmonic nanostructures to optimize the performance of optical switches and sensors based on metamaterial structures.