石墨烯
材料科学
费米能量
光电子学
等离子体子
激发
石墨烯纳米带
纳米技术
物理
电子
量子力学
作者
Min Jiang,Jinfeng Li,Zhihao Li,Zelin Guo,Jian Xu,Chen Li
出处
期刊:IEEE Photonics Technology Letters
[Institute of Electrical and Electronics Engineers]
日期:2024-01-22
卷期号:36 (5): 349-352
标识
DOI:10.1109/lpt.2024.3356914
摘要
In this Letter, we report a nano-optical conveyor belt containing a couple of graphene nano-ribbon pairs (GNRPs) with graded lengths for the realization of trapping and transport of nanoparticles through manipulating the Fermi energy of graphene. In the mid-infrared waveband, graphene behaves like metals, and even more importantly, it supports tunable surface plasmon resonance (SPR) via manipulating its Fermi energy. The spectral responses of these graded graphene nano-ribbons with individual dimensions are dominated by their geometric parameters and surface conductivity, which is tunable and connected with Fermi energy. Optically trapped nano-particles can be transferred from one GNR to another under a single-wavelength polarized excitation beam by sequentially switching the Fermi energy via electric gating. The feasibility of our design to deliver target nano-particles or biomolecules over a long distance with nanometer accuracy is confirmed by the three-dimensional finite-difference time-domain technique. With the capacity to trap and transfer, our design offers a versatile scheme for conducting mechanical sample manipulation in many on-chip optofluidic applications.
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