The Library
Phase-mapping of periodically domain-inverted LiNbO3 with coherent X-rays
Tools
UNSPECIFIED (1998) Phase-mapping of periodically domain-inverted LiNbO3 with coherent X-rays. Nature, 392 (6677). pp. 690-693. ISSN 0028-0836.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Abstract
A varying refractive index across a wavefront leads to a change in the direction of propagation of the wave(1,2). This provides the basis for phase-contrast imaging of transparent or weakly absorbing materials with highly coherent X-ray beams(3,4). Lattice distortions can also change the direction of propagation of a wave field diffracted from a crystal. Here we report the use of this principle to effect phase-contrast imaging of the domain structure of a ferroelectric material, lithium niobate. A periodically domain-inverted structure for quasi-phase-matching of second-harmonic generation is created in this material, in which the direction of spontaneous polarization is sequentially inverted. Because of complex interactions during domain-inversion processing, this is accompanied by lattice distortions across the domain walls. These distortions split the diffracted wavefront of a beam of coherent X-rays from an advanced synchrotron source, giving rise to a pattern of interference that reflects the underlying pattern of lattice distortions. These results show that this phase-contrast imaging technique with sub-micrometre spatial resolution permits the non-destructive, highly sensitive phase-mapping of various structural defects and distortions introduced into materials during processing.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science | ||||
Journal or Publication Title: | Nature | ||||
Publisher: | MACMILLAN MAGAZINES LTD | ||||
ISSN: | 0028-0836 | ||||
Official Date: | 16 April 1998 | ||||
Dates: |
|
||||
Volume: | 392 | ||||
Number: | 6677 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 690-693 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |