Second-order nonlinear optical properties of chiral thin films

This paper reviews work on the second-order nonlinear optical properties of chiral thin films and surfaces. In particular, we give an overview of the theoretical formalism and experimental procedures that have been used to de scribe second-harmonic generation from chiral surfaces or thin films. In ad dition, we discuss a series of experimental results which include second-ha rmonic generation studies from surfaces and thin films composed of chiral s ynthetic and biological molecules. When appropriate, we point out possible applications or suggest directions for further research.