Detection of Chemical Vapor Deposition-Prepared Graphene by Surface Plasmon Polariton Imaging

Ruxue, 魏茹雪 Wei; Yanwei, 王延伟 Wang; Liwen, 江丽雯 Jiang; Xuqing, 孙旭晴 Sun; Hongyao, 刘虹遥 Liu; Chang, 王畅 Wang; Xinchao, 路鑫超 Lu; Weier, 卢维尔 Lu; Yang, 夏洋 Xia; Huang, Chengjun

doi:10.3788/aos201939.1124002

Cited by 1 publication

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“…The SPPs are with the characteristics of enhancing electric fields and breakthrough the diffraction limit, which made them widely used in detecting and sensing. For example, SPP-based localized field enhancement has been utilized for real-time label-free detection of individual nanoparticles [11], dynamic tracking of organelles within living cells [12], and detection of defects in graphene edge morphology [13]. In the field of sensing, Surface Plasmon Resonance (SPR) technology based on metal films, which is widely used in biosensing due to its sensitivity to the refractive index of the medium.…”

Section: Introductionmentioning

confidence: 99%

Enhance the detection of surface micro/nanostructures by SPPs generated from silver film covered hemi-microsphere

Ren,

Huang,

Wen

et al. 2024

Phys. Scr.

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Surface plasmon polaritons (SPPs) are widely used for surface micro/nanostructures detection. However, because of the limitations of the common SPPs excitation conditions, it is difficult to flexibly detect surface micro/nanostructures in the air without being limited by the substrate structure. In this paper, a new SPPs excitation structure is developed. This structure is a silver film covered hemi-microsphere. SPPs could be excited on the surface of the Ag film, and induce collective oscillations of free electrons on the substrate surface to generate periodic electromagnetic waves. The periodic electromagnetic waves can enhance the electromagnetic field around the surface micro/nanostructures, which could benefit the detection of those surface micro/nanostructures. This method could work in the air, and requires less of the sample structure, but also could move above the sample to achieve a large range of detection. Simulation experiment results demonstrate that this structure has a good detection effect. The maximum enhancement achieved for nanoparticles is 113-fold. This structure holds great potential for medical detection and biosensing.

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Section: Introductionmentioning

confidence: 99%