High-resolution surface plasmon resonance holographic microscopy based on symmetrical excitation

Jiazhen Dou, Chen Dong, Siqing Dai, Jingyu Mi, Xiangyuan Luo, Jianglei Di, Jiwei Zhang, Jianlin Zhao

科研成果: 期刊稿件文章同行评审

5 引用 (Scopus)

摘要

Surface plasmon resonance holographic microscopy (SPRHM) is able to simultaneously obtain the amplitude- and phase-contrast surface plasmon resonance (SPR) images, showing great potentials in imaging near-field targets with high sensitivity. However, suffered by the decaying length of surface plasmon wave which can be as long as tens of microns, the spatial resolution of SPRHM is lower than that of traditional holographic microscopy. In this work, we propose to enhance the spatial resolution in SPRHM by exciting surface plasmon resonance in two symmetrical directions and detecting the complex amplitudes of the reflected light symmetrically. Through the Fourier analysis of the recorded composite hologram, the reconstruction schemes for high-resolution amplitude- and phase-contrast SPR images are established, respectively. The feasibility and advantages of the proposed method is verified by numerical simulations and experimental demonstrations of small-size particles and micro-structures.

源语言英语
文章编号107000
期刊Optics and Lasers in Engineering
153
DOI
出版状态已出版 - 6月 2022

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