A COMBINED METHOD OF MULTIPLE-REFLECTION AND OPTICAL-WAVE-GUIDE RAMAN-SCATTERING SPECTROSCOPIES FOR STUDYING THE ELECTRIC-FIELD-INDUCED REORIENTATION OF A FERROELECTRIC LIQUID-CRYSTAL CELL

A combined method of multiple-reflection and optical-wave-guide Raman spectroscopies was proposed for studying the electric-field-induced re orientation of a surface-stabilized ferroelectric liquid crystal (FLC) cell. The method allowed us to measure selectively Raman scattering ( RS) spectra from the FLC in a bulk phase and those from the FLC near a n SiOx alignment layer. Time-resolved RS spectra from the two parts we re measured by applying step-wise external electric fields, indicating that the FLC near the alignment layer exhibits a retarded response to the field compared to that in the bulk phase. The results proved the usefulness of the proposed method. (C) 1998 Elsevier Science B.V. All rights reserved.