SELF-ASSEMBLY OF HEXATIC OPTICAL-PATTERNS IN FERROELECTRIC-CRYSTALS -REDISCOVERY OF THE SCHWARZ-HORA EFFECT

Authors
SCOTT JF OSULLIVAN RA REICH MH
Citation
Jf. Scott et al., SELF-ASSEMBLY OF HEXATIC OPTICAL-PATTERNS IN FERROELECTRIC-CRYSTALS -REDISCOVERY OF THE SCHWARZ-HORA EFFECT, Physica. A, 233(3-4), 1996, pp. 655-662
Citations number
15
Categorie Soggetti
Physics
Journal title
Physica. A → ACNP
ISSN journal
03784371
Volume
233
Issue
3-4
Year of publication
1996
Pages
655 - 662
Database
ISI
SICI code
0378-4371(1996)233:3-4<655:SOHOIF>2.0.ZU;2-4
Abstract
We have discovered the laser-induced ''freezing'' of charged defects i nto two-dimensional hexatic arrays in lead magnesium niobate. This sit uation arises when, due to simultaneous thermal focussing and photoref ractive phenomena, a holographic grating is produced that allows phase -matched light scattering. The diffraction angle for the hexagonal pat tern is Theta = 0.20 degrees, which agrees reasonably well with the th eoretical value of 0.45 degrees from Firth's equation.