  We show how intrinsic material properties modify light transmission through
subwavelength hole arrays on thin metallic films in the THz regime. We compare
the temperature-dependent transmittance of Au films and MgB$_{2}$ films. The
experimental data is consistent with analytical calculations, and is attributed
to the temperature change of the conductivity of both films. The transmission
versus conductivity is interpreted within the open resonator model when taking
the skin depth into consideration. We also show that the efficiency of this
temperature control depends on the ratio of the transmission peak frequency to
the superconducting energy gap in MgB$_{2}$ films.
