MODULATING LIGHT WITH LIGHT - A SLAB WAVE-GUIDE-LIQUID CRYSTAL DEVICE

Authors
ABBATE G DESTEFANO L MORMILE P PIERATTINI G SANTAMATO E VILLIARGIO M
Citation
G. Abbate et al., MODULATING LIGHT WITH LIGHT - A SLAB WAVE-GUIDE-LIQUID CRYSTAL DEVICE, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 251, 1994, pp. 93-100
Citations number
7
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
251
Year of publication
1994
Pages
93 - 100
Database
ISI
SICI code
1058-725X(1994)251:<93:MLWL-A>2.0.ZU;2-T
Abstract
We present an experiment of modulation of the light propagating in a w aveguide-liquid crystal (LC) planar stack, by an external light source . The results confirm that the molecular reorientation in the LC layer , induced by an external optical field, gives rise to a change in the refractive index which in turn modifies the propagation constants of t he guided modes, so that the light can be partially leaked off the gui de. It is shown how the modulation depends on the physical parameters of the materials and of the light.