Photonics Research, 2018, 6 (5): 05000409, Published Online: Jul. 6, 2018
Active macroscale visible plasmonic nanorod self-assembled monolayer Download: 867次
Active or adaptive optics Plasmonics Subwavelength structures, nanostructures Spectroscopy, modulation
Abstract
Although plasmonic nanostructure has attracted widespread research interest in recent years, it is still a major challenge to realize large-scale active plasmonic nanostructure operation in the visible optical frequency. Herein, we demonstrate a heterostructure geometry comprising a centimeter-scale Au nanoparticle monolayer and VO 2 films, in which the plasmonic peak is inversely tuned between 685 nm and 618 nm by a heating process since the refractive index will change when VO 2 films undergo the transition between the insulating phase and the metallic phase. Simultaneously, the phase transition of VO 2 films can be improved by plasmonic arrays due to plasmonic enhanced light absorption and the photothermal effect. The phase transition temperature for Au / VO 2 films is lower than that for bare VO 2 films and can decrease to room temperature under the laser irradiation. For light-induced phase transition of VO 2 films, the laser power of Au / VO 2 film phase transition is ~ 28.6 % lower than that of bare VO 2 films. Our work raises the feasibility to use active plasmonic arrays in the visible region.
Yue Li, Jian Li, Taixing Huang, Fei Huang, Jun Qin, Lei Bi, Jianliang Xie, Longjiang Deng, Bo Peng. Active macroscale visible plasmonic nanorod self-assembled monolayer[J]. Photonics Research, 2018, 6(5): 05000409.