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

Investigation of the SERS spectra of copper phthalocianine adsorbed on gallium phosphide substrates