  The PTFE (Teflon) has been selected as the self-template structural material
in preparation of VO2 films using reactive magnetron sputtering systems and
post annealing progress. Spontaneous random nano-porous structures of VO2 films
growing on quartz glasses have been deliberately established via bottom-up
processing through this novel and facile approach. The nano-porous VO2 films
exhibit an excellent optical performance based on localized surface plasmon
resonance (LSPR), with ultrahigh luminous transmittance (Tlum) up to 78.0% and
the promoted solar modulation ability ({\Delta}Tsol) of 14.1%. Meanwhile, the
ingenious microstructure of film provides an antireflection function from
multiple perspectives in visible light, with the potential of the windshield on
vehicles for smart solar modulation. The nano-porous films expand the practical
application of thermochromic VO2 to a fire-new field, breaking the optical
performance envelope of single-layer dense VO2 film away, and offering a
universal method to prepare homogeneous nano-porous structures for thin films.
