  Extended Vicsek fractals (EVF) are the structures constructed by introducing
linear spacers into traditional Vicsek fractals. Here we study the Laplacian
spectra of the EVF. In particularly, the recurrence relations for the Laplacian
spectra allow us to obtain an analytic expression for the sum of all inverse
nonvanishing Laplacian eigenvalues. This quantity characterizes the large-scale
properties, such as the gyration radius of the polymeric structures, or the
global mean-first passage time for the random walk processes. Introduction of
the linear spacers leads to local heterogeneities, which reveal themselves, for
example, in the dynamics of EVF under external forces.
