Xiaoyu Jin, Yu Cui, Houkai Chen, Rui Hao, Fucai Zhang，“High quality surface plasmon resonance microscopy based on dual-channel frequency-domain filtering method”，Optics & Laser Technology 183, 112311（2025）

【原文】

High quality surface plasmon resonance microscopy based on dual-channel frequency-domain filtering method

ABSTRACT

Surface plasmon resonance microscopy is a promising, label-free near-field imaging method that allows the measurement of tiny variations in the refractive index distributions of a sample with high sensitivity. However, the propagating nature of surface plasmon waves severely degrades the quality and resolution of the obtained images. This paper proposes a quality-enhanced approach by frequency-domain filtering under dual azimuthal angles. The method eliminates the comb artifacts by a specifically designed dual-ring filter. In the simulations and experiments, high-fidelity images with almost twice the spatial resolution of the conventional surface plasmon resonance microscopy have been obtained.