Open AccessSPATIAL SOLITONS IN PHOTOVOLTAIC PHOTOREFRACTIVE CRYSTALS IN AN EXTERNAL BIAS FIELD
Author(s) -
Lu Ke-Qing,
Tang Tian-Tong
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.2070
Subject(s) - photorefractive effect , electric field , photovoltaic effect , anomalous photovoltaic effect , polarization (electrochemistry) , physics , photovoltaic system , field (mathematics) , polarity (international relations) , optics , biasing , condensed matter physics , voltage , quantum mechanics , chemistry , electrical engineering , biochemistry , mathematics , pure mathematics , cell , engineering
Bright and dark spatial solitons are predicted for biased photovoltaic photorefractive crystals, which are due to both the spatially nonuniform screening of the external electric field and the photovoltaic effect. These solitons differ form previously observed photorefractive spatial solitons in their properties. When external electric field is of a certain value, these solitons may be switched from bright to dark both by changing the polarity of the external electric field and by rotating the polarization of the light. In case the effect of the external bias field is much stronger than the photovoltaic effect and the latter can be neglected, these solitons are similar to screening solitons. In case the external bias field is absent, these solitons are similar to photovoltaic solitons in the open-circuit case.