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首页> 外文会议>Photonic and phononic properties of engineered nanostructures VII >Plasmonic Optical NanoTweezers
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Plasmonic Optical NanoTweezers

机译：等离子光学纳米镊子

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摘要

Plasmonic grating structures can be used in many applications such as nanolithography and optical trapping. In this paper, we used plasmonic grating as optical tweezers to trap and manipulate dielectric nano-particles. Different plasmonic grating structures with single, double, and triple slits have been investigated and analyzed. The three configurations are optimized and compared to find the best candidate to trap and manipulate nanoparticles. The three optimized structures results in capability to super focusing and beaming the light effectively beyond the diffraction limit. A high transverse gradient optical force is obtained using the triple slit configuration that managed to significantly enhance the field and its gradient. Therefore, it has been chosen as an efficient optical tweezers. This structure managed to trap sub 10nm particles efficiently. The resultant 50KT potential well traps the nano particles stably. The proposed structure is used also to manipulate the nano-particles by simply changing the angle of the incident light. We managed to control the movement of nano particle over an area of (5μm x 5μm) precisely. The proposed structure has the advantage of trapping and manipulating the particles outside the structure (not inside the structure such as the most proposed optical tweezers). As a result, it can be used in many applications such as drug delivery and biomedical analysis.
机译：等离子光栅结构可用于许多应用中，例如纳米光刻和光阱。在本文中，我们使用等离激元光栅作为光镊来捕获和操纵介电纳米粒子。已经研究和分析了具有单，双和三狭缝的不同等离激元光栅结构。对这三种配置进行了优化并进行了比较，以找到捕获和处理纳米颗粒的最佳候选者。三种优化的结构使它们能够有效地聚焦并有效地射出超出衍射极限的光。使用三重缝隙配置可以获得较高的横向梯度光学力，该配置可以显着增强场及其梯度。因此，它被选作高效的光镊。这种结构设法有效地捕获了10nm以下的颗粒。所得的50KT电势阱稳定地捕获了纳米颗粒。所提出的结构还用于通过简单地改变入射光的角度来操纵纳米粒子。我们设法精确控制了纳米粒子在（5μmx5μm）区域内的运动。所提出的结构具有在结构外部（而不是在结构内部，例如最提出的光镊子）捕获和操纵颗粒的优点。结果，它可以用于许多应用中，例如药物输送和生物医学分析。

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