光学
表面等离子体子
材料科学
反射(计算机编程)
电介质
全内反射
激发
极化(电化学)
等离子体子
入射面
偶极子
光学力
折射率
平面波
粒子(生态学)
物理
光电子学
光学镊子
物理化学
化学
量子力学
计算机科学
程序设计语言
海洋学
地质学
作者
H. Ferrari,Víctor Herrero,Mauro Cuevas
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-04-24
卷期号:48 (9): 2345-2345
被引量:3
摘要
In this Letter, a simple structure formed by a metallic thin layer covering a high-index substrate is used to design an optical tweezer. Owing to the interaction between the field scattered by the particle with an incident plane wave and the proposed structure, a pulling or attractive component of the optical force emerges. This component results in enhancement thanks to the surface plasmons (SPs) excitation arising from the elliptical polarization of the induced dipole moment on the particle. To further exploit the versatility of the proposed approach, we analyze two basic configurations: the reflection scheme, for which the plane wave impinges from the side where the particle is placed; and the transmission scheme, for which the incidence is made from the substrate side. Our results show that the intensity of the pulling force in the reflection scheme and for finite thickness metal layer reaches values exceeding more than twice those provided by a single metallic interface. We also demonstrate that the transmission scheme is more favorable than the reflection scheme for enhancing pulling force intensities. Our contribution can be valuable for realizing simple plasmonic schemes for improving the pulling force via interactions between the nano-particle and SP fields.
科研通智能强力驱动
Strongly Powered by AbleSci AI