研究目的
To analytically study the azimuthal angle relation for obliquely excited standing-wave surface plasmon and propose a near-field spatial frequency filtering model to describe the spatial resolving power of surface plasmon self-interference virtual probe imaging system.
研究成果
The study presents a near-field spatial frequency filtering model for the evanescent wave information in SPP self-interference virtual probe imaging and estimates the FWHM of the longitudinal surface plasmon field distribution profile. The results of theoretical analysis on the spatial resolving power evolution agree well with the simulations based on the angular spectrum representation. The incidence coupling process possesses anisotropy because of the polarization modulation, and spatial resolution degradation is originated from the loss of information caused by the compression of the spatial frequency bandwidth in the near-field domain.
研究不足
The study is limited to the analytical and numerical investigation of the near-field spatial frequency filtering model for surface plasmon self-interference virtual probe imaging system. Experimental validation is not included.
