Manufacturing method of metal structures for surface enhanced raman spectroscopy

Manufacturing method of metal structures, active in surface enhanced Raman spectroscopy or related spectroscopies, implemented in a system comprising at least one lens, a plurality of mirrors and at least one beam splitter; and wherein said manufacturing method comprises at least the following steps: (i) a first step of splitting a laser beam into sub-beams by using a plurality of mirrors, these sub-beams having an impact on the sample of solid material to ablate or structure; (ii) a second step of depositing a metal layer on the SERS active surface structure of the previous step; (iii) a third step of placing the analyte distributed on the surface of the solid material coated with active metal; and (iv) a fourth step of obtaining the Raman spectrum by a monochromatic light incidence on the molecules immobilized on the surface structure.