In this paper, we propose a systematic approach to controllably fabricate silver nanoparticles, dendrites and nanovoids on
porous template based on silicon and two-step wet process. Geometry of metallic structures was managed by variation of
dopant type of silicon, regimes of template formation and deposition of silver. General models of each structure were
developed and studied for distribution and strength of electric field arising in them under 473, 633 and 785 nm laser
excitation. Simulation results revealed reasons of variable activity of the fabricated structures in surface enhanced Raman
spectroscopy, which allowed to define optimal conditions of analysis of target molecules
