Third-Order Nonlinear Optical Response of Gold-Island Films (pages 1281–1289)
Evangelia Xenogiannopoulou, Kostas Iliopoulos, Stelios Couris, Tanya Karakouz, Alexander Vaskevich and Israel Rubinstein
Article first published online: 17 APR 2008 | DOI: 10.1002/adfm.200701084
The influence of film morphology on the third-order nonlinear optical response of ultrathin Au films of nanoscaled island structures is studied. Controlling the substrate treatment and film-growth parameters (leftmost images are of annealed films vs. unannealed on the right) enables tuning of both the linear and nonlinear optical properties of the films. The sign of the real and imaginary parts of the third-order susceptibility can be controlled by choosing the appropriate excitation wavelength.