发表机构
Sylhet Engineering College; Sylhet Agricultural University（锡尔赫特工程学院; 锡尔赫特农业大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用双曲超材料基底，通过全波模拟证明等离激元、手性和介电纳米棒在团簇及单体构型下均能产生稳定的光学牵引力，且等离激元在单体时受力最大，为光学操控提供了实用方案。
AI 中文摘要
光学操控利用光实现对微观粒子的控制，近年来已成为一个活跃的研究领域。其中一个特别引人关注的方面是利用双曲超材料（HMMs）产生光学牵引力，这导致了不寻常的光与物质相互作用。在本工作中，研究了等离激元、手性和介电纳米棒在HMM基底上的牵引响应。该系统由一束沿+Z到-Z方向传播的时间谐波、平面偏振激光束照射。分析在两种不同构型下进行。第一种情况下，等离激元、手性和介电纳米棒以异质团簇形式排列在HMMs上，并在三种环境条件下分析其光学力响应：完全浸没在水中、部分浸没（半空气-半水）以及完全在空气中。全波模拟表明，在所有三种环境中，所有物体（等离激元、手性、介电）纳米棒在团簇构型下始终经历约1E(-20)N量级的光学牵引力。第二种情况下，每种纳米棒类型独立放置在相同的HMMs基底上，处于全空气介质中，并研究其力行为，其中等离激元在单体设置中受到的力比其他类型大100倍，达到1E(-19)N范围。与团簇情况类似，三种纳米棒单独存在时也表现出稳定的光学牵引力，并且随着长度、半径以及它们之间距离的变化也能获得牵引力，这使得该光学设置更具实用性。等离激元的行为随纳米结构的排列变化很大。另一方面，介电纳米棒受其长度的影响大于其位置的影响。在我们的结果中，即使使用简单的HMM结构，所有纳米棒都出现了光学牵引现象。
英文摘要
Optical manipulation enables the control of microscopic particles using light and has become an active area of research in recent years. One particularly interesting aspect is the possibility of generating optical pulling forces with hyperbolic metamaterials (HMMs), which leads to unusual light-matter interactions. In this work, the pulling response of plasmonic, chiral, and dielectric nanorods is studied on an HMM substrate. The system is illuminated by a time-harmonic, plane-polarized laser beam propagating along the +Z to -Z direction. The analysis is carried out under two different configurations. In the first case, plasmonic, chiral, and dielectric nanorods are arranged in a heterogeneous cluster over the HMMs and analyzed for the optical force response under three environmental conditions: fully immersed in water, partially immersed (half air-half water), and fully in air. Full-wave simulations reveal that in all three environments, all the objects (plasmonic, chiral, dielectric) nanorods consistently experience an optical pulling force at the 1E(-20)N scales for clustered configuration. In the second case, each nanorod type was independently placed on the same HMMs substrate within a full-air medium and investigated their force behaviors, while the plasmonic experience 100 times more than others for the single setup, which is 1E(-19)N ranges. Like the case of the cluster, three nanorods alone demonstrate a stable optical pulling force, also getting the pulling force with the variation of length, radius, and distance between them, which makes this optical setup more practical. Plasmonic behavior changes a lot with the arrangement of the nanostructures. On the other hand, dielectric nanorods are affected more by their length than their position. In our results, optical pulling appears for all the nanorods even with a simple HMM structure...
