Optics and Nonlinear Buckling Mechanics in Large-Area, Highly Stretchable Arrays of Plasmonic Nanostructures
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- 作者：Li Gao ; Yihui Zhang ; Hui Zhang ; Sage Doshay ; Xu Xie ; Hongying Luo ; Deesha Shah ; Yan Shi ; Siyi Xu ; Hui Fang ; Jonathan A. Fan ; Peter Nordlander ; Yonggang Huang ; John A. Rogers
- 刊名：ACS Nano
- 出版年：2015
- 出版时间：June 23, 2015
- 年：2015
- 卷：9
- 期：6
- 页码：5968-5975
- 全文大小：771K
- ISSN：1936-086X
文摘
Large-scale, dense arrays of plasmonic nanodisks on low-modulus, high-elongation elastomeric substrates represent a class of tunable optical systems, with reversible ability to shift key optical resonances over a range of nearly 600 nm at near-infrared wavelengths. At the most extreme levels of mechanical deformation (strains >100%), nonlinear buckling processes transform initially planar arrays into three-dimensional configurations, in which the nanodisks rotate out of the plane to form linear arrays with 鈥渨avy鈥?geometries. Analytical, finite-element, and finite-difference time-domain models capture not only the physics of these buckling processes, including all of the observed modes, but also the quantitative effects of these deformations on the plasmonic responses. The results have relevance to mechanically tunable optical systems, particularly to soft optical sensors that integrate on or in the human body.