AVS 47th International Symposium
    Processing at the Nanoscale/NANO 6 Friday Sessions
       Session NS+NANO6+MC-FrM

Paper NS+NANO6+MC-FrM6
Scanning Probe Microscopy Study of Engineered Ferroelectric Domain Structures

Friday, October 6, 2000, 10:00 am, Room 302

Session: Nanoscale Spectroscopy
Presenter: G. Rosenman, Tel-Aviv University, Israel
Authors: G. Rosenman, Tel-Aviv University, Israel
A. Agronin, Tel-Aviv University, Israel
Y. Rosenwaks, Tel-Aviv University, Israel
M. Lesnih, Tel-Aviv University, Israel
P. Urenski, Tel-Aviv University, Israel
Correspondent: Click to Email
Ferroelectric domain engineering has recently become an attractive and perspective tool for diverse nonlinear optical applications based on the quasi-phasematching method (QPM). The QPM occurs by the use of specifically tailored ferroelectric domain configurations with alternate direction of spontaneous polarization. Various types of engineered domain structures (periodic, aperiodic and quasi-periodic) allow an effective generation of coherent light in spectral regions where conventional lasers are not available. In this work we have studied engineered domain configurations (fabricated by electrical poling method in ferroelectric KTiOPO4 crystals) using different scanning probe techniques like: piezoresponse imaging, Kelvin probe force microscopy, and conventional topography imaging. The different AFM methods image the periodically poled domains and domain walls with high spatial resolution. A detailed electrostatic analysis of the data, and the contrast between ferroelectric domains with opposite polarity is presented.