Electric Field Induced Ferroelectric Microdomain Inversion on X- and Y-Cut Lithium Niobate,
Abstract
Ferroelectric microdomain inversion in LiNbO3 has been demonstrated as an important means for integrated optics technology allowing quasi-phasematching of second order nonlinear processes such as second harmonic generation in optical waveguides. Most of the processes investigated up to now for the generation of inverted microdomains are applicable only on +/-Z-faces of LiNbO3 1,2,3. For +/-Y-cut material we recently demonstrated periodical domain reversal by pyroelectrically generated electrical fields across a small gap between comblike electrodes 4; the depth of the microdomains was about 0.25 micrometer. In this contribution we present a new approach using again electrical fields between similar, photolithographically defined electrodes; however, now the electrical field is generated by applying a well defined external voltage. The new method gave a better control of the process and was successfully applied not only to Y-cut, but also - for the first time - to X-cut crystals. The depth of the domains could be increased up to 1.8 micrometer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1992
- Accession Number
- ADP008140
Entities
People
- G. Janzen
- H. Seibert
- W. Sohler
Organizations
- University of Paderborn