|
The local field enhancement generates in the vicinity of the tip which has approached to surface plasmon resonance (SPR)
region of the sample. The power of the local field enhancement could be utilized to pattern the sample, and this new
lithography method is called probe inducing surface plasmon resonance nanolithography (PSPRN). Owing to the high
energy density of local field enhancement and super-diffraction limiting character, PSPRN has the advantages of low
power consumption and high resolution. The influence of various film parameters on SPR was simulated by eigenmatrix
method in this paper. Through analysis and by comparison, glass ZF6, silver (Ag), silicon dioxide (SiO2) and silver oxide
(AgOx) were selected as the materials for prism, metal layers, protecting layers and recoding layers respectively. A
PSPRN experiment was implemented on an atomic force microscope (AFM). In the experiment, samples with
single-layer, double-layer, and three-layer structures were researched. Holes of 100nm / 18nm, 75nm / 7nm and 195nm /
7.5nm (diameter/depth) were written into the three structures respectively. However, the result was not ideal with
three-layer structure. The influence of diverse parameters on the size of lithography point has been analyzed, which
could help providing the theory basis for improving experiment equipment.
|
