GENERATION OF SPATIAL SUBHARMONIC GRATINGS IN THE ABSENCE OF PHOTOREFRACTIVE BEAM COUPLING

Authors
MCCLELLAND TE WEBB DJ STURMAN BI RINGHOFER KH
Citation
Te. Mcclelland et al., GENERATION OF SPATIAL SUBHARMONIC GRATINGS IN THE ABSENCE OF PHOTOREFRACTIVE BEAM COUPLING, Physical review letters, 73(23), 1994, pp. 3082-3084
Citations number
10
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
23
Year of publication
1994
Pages
3082 - 3084
Database
ISI
SICI code
0031-9007(1994)73:23<3082:GOSSGI>2.0.ZU;2-4
Abstract
Using a new experimental geometry, we have proved for the first time t hat the generation of spatial subharmonic gratings in photorefractive crystals is not dependent on optical nonlinearity. We present results which confirm that the subharmonic gratings result from a parametric e xcitation of ultra low-frequency eigenmodes of a crystal by a time mod ulated fundamental grating.