Dynamically controllable plasmonic tweezers using C-shaped nano-engravings.
Dynamically controllable plasmonic tweezers using C-shaped nano-engravings.
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DOI：
10.1063/5.0123268
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发表时间：
2022-10
影响因子：
4
通讯作者：
M. Zaman;L. Hesselink
中科院分区：
文献类型：
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作者：
M. Zaman;L. Hesselink
提出了一种基于等离子体C形纳米雕刻的近场光阱方案。利用极化敏感性的C-结构，提出了一种机制，用于动态控制电场，相关的捕获力，和等离子体激元加热。电磁分析和粒子动力学模拟进行验证的方法的可行性。设计的结构进行了制作和实验测试。激发光的偏振控制通过使用半波片来实现。实验结果表明，动态可调等离子体镊子的功能实现。动态可控性可以允许在较低的场强下维持捕获，这减少了光热效应。因此，在处理敏感样品时，可以降低热损伤的可能性。
A near-field optical trapping scheme using plasmonic C-shaped nano-engraving is presented. Utilizing the polarization sensitivity of the C-structure, a mechanism is proposed for dynamically controlling the electric field, the associated trapping force, and the plasmonic heating. Electromagnetic analysis and particle dynamics simulations are performed to verify the viability of the approach. The designed structure is fabricated and experimentally tested. Polarization control of the excitation light is achieved through the use of a half-wave plate. Experimental results are presented that show the functioning implementation of the dynamically adjustable plasmonic tweezers. The dynamic controllability can allow trapping to be maintained with lower field strengths, which reduces photo-thermal effects. Thus, the probability of thermal damage can be reduced when handling sensitive specimens.