In second-harmonic scanning imaging of interface structures, interference from constant-background contributions can lead to severe distortions of the second-harmonic image compared with the true interface morphology. Similar phenomena can appear in time-dependent second-harmonic measurements. We present an analysis of these effects and demonstrate a simple but powerful technique to eliminate these coherence artifacts.
© 1998 Optical Society of America
(110.1650) Imaging systems : Coherence imaging
(180.5810) Microscopy : Scanning microscopy
(190.4350) Nonlinear optics : Nonlinear optics at surfaces
(190.4360) Nonlinear optics : Nonlinear optics, devices
M. Cernusca, M. Hofer, and G. A. Reider, "Coherence effects in second-harmonic interface imaging," J. Opt. Soc. Am. B 15, 2476-2480 (1998)