Tunable Optical Antennas Using Vanadium Dioxide Metal-Insulator Phase Transitions
Authors: Tognazzi A., Locatelli A., Vincenti M.A., Giannetti C., De Angelis C.
Autors Affiliation: Univ Brescia, Dipartimento Ingn Informaz, Brescia, Italy; CNR, INO, Brescia, Italy; Univ Cattolica Sacro Cuore, I LAMP, Brescia, Italy; Univ Cattolica Sacro Cuore, Dipartimento Fis, Brescia, Italy
Abstract: Here, we investigate the possibility of exploiting the insulator-to-metal transition in vanadium dioxide (VO2) to tune and optically control the resonances of dipole nanoantennas in the visible near-infrared region. We compare the results obtained in the case of antennas completely made by VO2 with those of previous works and highlight the key role of the substrate to perform dynamical tuning. We also present a highly efficient configuration composed of dipole gold antenna loaded with VO2 and give some general guidelines to optimally exploit phase transitions to tune nanodevices.
Volume: 14 (5) Pages from: 1283 to: 1288