QUANTITATIVE-DETERMINATION OF ELECTRIC AND MAGNETIC 2ND-ORDER SUSCEPTIBILITY TENSORS OF CHIRAL SURFACES

We present a measurement technique to determine the relative values of ail components of the three tensors that describe second-harmonic gen eration from chiral isotropic surfaces up to first order in the magnet ic-dipole interaction. For a thin film of a chiral polymer, the larges t tensor components involving magnetic interactions are nonvanishing o nly because of chirality and their magnitudes are similar to 20% of th e largest electric-dipole-only components. These chiral magnetic compo nents are larger than the chiral electric component.