  Fano resonance observed in various classical and quantum systems features an
asymmetric spectral line shape. For designing nanoresonators for monochromatic
applications, it is beneficial to describe Fano resonance in non-spectral
parametric domains of critical structural parameters. We develop the analytical
model of the parametric Fano profile based on a coupled harmonic oscillator
(CHO) model and theoretically demonstrate its application in describing the
optical response of a chirped waveguided plasmonic crystal (CWPC). The
developed parametric Fano model may find applications in the design of
monochromatic and spectrometer-free nanodevices.
