Poutrina Ekaterina, Ciracì Cristian, Gauthier Daniel J, Smith David R
Center for Metamaterials and Integrated Plasmonics, Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA.
Opt Express. 2012 May 7;20(10):11005-13. doi: 10.1364/OE.20.011005.
We consider the process of four-wave mixing in an array of gold nanowires strongly coupled to a gold film. Using full-wave simulations, we perform a quantitative comparison of the four-wave mixing efficiency associated with a bare film and films with nanowire arrays. We find that the strongly localized surface plasmon resonances of the coupled nanowires provide an additional local field enhancement that, along with the delocalized surface plasmon of the film, produces an overall four-wave mixing efficiency enhancement of up to six orders of magnitude over that of the bare film. The enhancement occurs over a wide range of excitation angles. The film-coupled nanowire array is easily amenable to nanofabrication, and could find application as an ultra-compact component for integrated photonic and quantum optic systems.
我们研究了与金膜强耦合的金纳米线阵列中的四波混频过程。通过全波模拟，我们对裸膜和具有纳米线阵列的膜的四波混频效率进行了定量比较。我们发现，耦合纳米线的强局域表面等离子体共振提供了额外的局部场增强，与膜的离域表面等离子体一起，产生了比裸膜高达六个数量级的整体四波混频效率增强。这种增强在很宽的激发角范围内都能出现。膜耦合纳米线阵列易于进行纳米制造，可作为集成光子和量子光学系统的超紧凑组件。
