  A non-markovian stochastic model shows the emergence of structures in the
medium, a self-organization characterized by a relationship between particle's
energy, driven frequency $\omega$ and a frequency of interaction with the
medium $\nu$. The interaction determines its mass and this fine tuning results
in an effective force given by $F_L=\hbar \omega^2 n(\lambda)/ c$, similar to
the interaction force between photons and atoms. Condition for the
particle-medium resonance is determined, with relevance to detect dark matter
axion-like particles and the parametric resonance as a pop-up mechanism to turn
fields into particles.
