Experimental observation of the slowdown of optical beams by a volume-index grating in a photorefractive LiNbO3 crystal

Authors
Lin, SH Hsu, KY Yeh, P
Citation
Sh. Lin et al., Experimental observation of the slowdown of optical beams by a volume-index grating in a photorefractive LiNbO3 crystal, OPTICS LETT, 25(21), 2000, pp. 1582-1584
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
01469592 → ACNP
Volume
25
Issue
21
Year of publication
2000
Pages
1582 - 1584
Database
ISI
SICI code
0146-9592(20001101)25:21<1582:EOOTSO>2.0.ZU;2-S
Abstract
We investigate the group velocity of light in a one-dimensional volume-inde x grating inside a photorefractive LiNbO3 crystal. The slowdown of the grou p electromagnetic propagation is observed experimentally by tuning of the w ave number of the optical beam close to the outside edge of the forbidden b andgap. We obtain a large group index of up to 7.5 in a 3.5-cm crystal samp le. The group index is compared with the result of a theoretical derivation . The results are presented and discussed. (C) 2000 Optical Society of Amer ica OCIS codes: 050.7330, 260.2030, 190.5530, 160.3730.