title: Optical second-harmonic generation enhanced by a twist defect in ferroelectric liquid crystals.
abstract: Second-harmonic generation (SHG) spectra were numerically calculated in ferroelectric liquid crystals with a twist defect. It is shown that SHG is enhanced when the SHG wavelength is close to the defect mode. The spectral width of the enhanced peak becomes sharper with increasing the sample thickness at the same rate for the width of the defect mode peak. The SHG peak intensity increases with about seventh power of the sample thickness.
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Hoshi
authors.forename: Ken
authors.initials: K
authors.lastname: Ishikawa
authors.forename: Hideo
authors.initials: H
authors.lastname: Takezoe