Fast photorefractive response in strongly reduced near-stoichiometric LiNbO_3 crystals

Autor:	Bing Li, Tao Ling, Dengsong Zhu, Xiaojun Chen, Zhong-Kang Wu
Rok vydání:	2001
Předmět:	Materials science Holographic grating business.industry Photorefractive effect Diffraction efficiency Ray Atomic and Molecular Physics and Optics Organic photorefractive materials Crystal Light intensity Wavelength Optics Optoelectronics business
Zdroj:	Optics Letters. 26:998
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.26.000998
Popis:	The photorefractive response time of LiNbO(3) crystal is of the order of minutes, and such a long response time limits the crystal's practical applications. We report the photorefractive properties of nominally pure near-stoichiometric LiNbO(3) crystal that is strongly reduced in vacuum. A short photorefractive response time of the order of 100 ms is measured at a wavelength of 514.5 nm, with incident light intensity of 1.6 W/cm (2) , and possible corresponding mechanisms are discussed. To our knowledge this is the first experimental evidence of a subsecond photorefractive response in pure LiNbO(3) crystals. The diffraction efficiency of a holographic grating written in this reduced crystal is low but can be enhanced by an externally applied electric field.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0632cdfc9bfaf849fcfad057e8101413 https://doi.org/10.1364/ol.26.000998 Zobrazit plný text záznamu