title: Near-field second harmonic imaging of the c/a/c/a polydomain structure of epitaxial PbZrxTi(1-x)O3 thin films.
abstract: Near-field optical second harmonic microscopy has been applied to imaging of the c/a/c/a polydomain structure of epitaxial PbZrxTi1-xO3 thin films in the 0 < x < 0.4 range. Comparison of the near-field optical images and the results of atomic force microscopy and X-ray diffraction studies show that an optical resolution of the order of 100 nm is achieved. Symmetry properties of the near-field second harmonic signal allow us to obtain good optical contrast between the local second harmonic generation in c- and a-domains. Experimentally measured near-field second harmonic images have been compared with the results of theoretical calculations. Good agreement between theory and experiment is demonstrated.
authors: Electrical and Computer Engineering Department, University of Maryland, College Park, MD 20742, USA. smoly@eng.umd.edu
authors: I I
authors: II
authors: Smolyaninov
authors: H Y
authors: HY
authors: Liang
authors: C H
authors: CH
authors: Lee
authors: C C
authors: CC
authors: Davis
authors: V
authors: V
authors: Nagarajan
authors: R
authors: R
authors: Ramesh