Plasmonic meniscus lenses.
Plasmonic meniscus lenses.
复制标题
等离子体弯月形透镜
DOI：
10.1038/s41598-022-04954-0
复制
发表时间：
2022-01-18
影响因子：
4.6
通讯作者：
Pacheco-Peña V
中科院分区：
文献类型：
--
作者：
Riley JA;Healy N;Pacheco-Peña V
控制和操纵表面等离子体的传播已经成为一个激烈的研究领域，因为它们在广泛的应用中具有潜力，例如等离子体电路，光学捕获，传感器和透镜。在这篇文章中，我们利用经典光学技术来设计和评估具有类抛物面几何形状的等离子体透镜的性能。要做到这一点，我们使用一个适应的透镜制造商方程，采用了有效介质的概念，表面等离子体激元在电介质金属和电介质-电介质-金属配置。这种等离子体弯月形透镜的设计过程进行了详细说明，并评估了两种不同的等离子体聚焦结构：具有准平面输出表面的等离子体透镜和具有凹凸输入输出表面的等离子体弯月形透镜。该结构被设计为在633 nm的可见波长处具有2λ0的有效焦距。示出了两个等离子体透镜的性能比较，证明了功率增强的改进，与用凸平面透镜获得的功率增强相比，当使用2D（理想）或3D（现实等离子体）弯月面设计时分别增加了22%和16.5%。它还表明，焦斑的焦点深度呈现出19.8%的减少时，使用弯月形透镜在2D和34.3%的减少时，使用所提出的3D等离子体弯月形设计。还研究了等离子体弯月形透镜（550-750 nm波长范围）的宽带响应，沿着潜在的制造误差对所产生的有效焦距的影响。所提出的等离子体透镜可以被利用作为替代聚焦装置的表面等离子体激元在应用中，如传感。
Controlling and manipulating the propagation of surface plasmons has become a field of intense research given their potential in a wide range of applications, such as plasmonic circuits, optical trapping, sensors, and lensing. In this communication, we exploit classical optics techniques to design and evaluate the performance of plasmonic lenses with meniscus-like geometries. To do this, we use an adapted lens maker equation that incorporates the effective medium concepts of surface plasmons polaritons travelling in dielectric-metal and dielectric-dielectric-metal configurations. The design process for such plasmonic meniscus lenses is detailed and two different plasmonic focusing structures are evaluated: a plasmonic lens with a quasi-planar output surface and a plasmonic meniscus lens having a convex-concave input–output surface, respectively. The structures are designed to have an effective focal length of 2λ0 at the visible wavelength of 633 nm. A performance comparison of the two plasmonic lenses is shown, demonstrating improvements to the power enhancement, with a 22% and 16.5% increase when using 2D (ideal) or 3D (realistic plasmonic) meniscus designs, respectively, compared to the power enhancement obtained with convex-planar lenses. It is also shown that the depth of focus of the focal spot presents a 19.8% decrease when using meniscus lenses in 2D and a 34.3% decrease when using the proposed 3D plasmonic meniscus designs. The broadband response of a plasmonic meniscus lens (550–750 nm wavelength range) is also studied along with the influence of potential fabrication errors on the generated effective focal length. The proposed plasmonic lenses could be exploited as alternative focusing devices for surface plasmons polaritons in applications such as sensing.
登录
查看更多内容
影响因子：
10.8
作者：
Liu, ZW;Steele, JM;Zhang, X
通讯作者：
Zhang, X
影响因子：
3.8
作者：
Dennis, Brian S.;Czaplewski, David A.;Aksyuk, Vladimir
通讯作者：
Aksyuk, Vladimir
影响因子：
4.5
作者：
Das, G.;Coluccio, M. L.;Di Fabrizio, E.
通讯作者：
Di Fabrizio, E.
影响因子：
3.7
作者：
Della Valle, G.;Longhi, S.
通讯作者：
Longhi, S.
DOI：
10.1088/1464-4258/2/5/316
发表时间：
2000-09-01
期刊：
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
影响因子：
--
作者：
Ilinsky, R
通讯作者：
Ilinsky, R