| abstract |
A nonlinear optical material, which comprises a chalcone derivative of general formula (I) or (II), wherein R1 and R2 each represents a halogen atom, a hydroxy group, an amino group, a dimethylamino group, a nitro group, a cyano group, a phenyl group, an acetyl group, an alkyl group having 1 to 18 carbon atoms or an alkyloxy group having 1 to 22 carbon atoms, n1 and n2 each represents an integer of 0 to 21, and m1 and m2 each represents an integer of 0 to 5. |