A. Kirilyuk et al., NONLINEAR MAGNETOOPTICAL RESPONSE FROM QUANTUM-WELL STATES IN NOBLE-METALS - DOUBLE PERIOD AND INTERFACE LOCALIZATION, Physical review letters, 77(22), 1996, pp. 4608-4611
The nonlinear optical response from quantum well states in ultrathin n
oble metal films is shown to dominate the total generated second harmo
nic output from such films. The observed oscillatory behavior with ove
rlayer thickness shows a period doubling with respect to that observed
in linear Kerr measurements. This is shown to be related to the symme
try properties and interface localization of the quantum well states.