The SERS spectra of the phthalocianine molecule, adsorbed on the gallium phosphide substrate are investigated. It is demonstrated that there appear strong lines, which are forbidden in usual Raman scattering. Analysis of the spectra indicates that these lines are associated with a strong quadrupole light-molecule interaction and also by a strong enhancement of the tangential components of the electric field on the surface. As it was demonstrated earlier, the last effect is characteristic for SERS on semiconductor and dielectric substrates, where there is the enhancement not only of the normal, but of the tangential components of the electric field on the surface.
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