Prewavy pattern: A director-modulation structure in nematic liquid crystals

Jong Hoon Huh, Yoshiki Hidaka, Yusril Yusuf, Nándor Éber, Tibor Tóth-Katona, Ágnes Buka, Shoichi Kai

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


A periodic structure (the prewavy pattern) found below the onset of electroconvection in a homeotropically aligned nematic liquid crystal is reported. It is characterized by a periodic modulation of the director in the xy-plane, which can be distinguished from electroconvection patterns with modulation in the xz-plane. The prewavy instability is investigated in detail; a phase diagram in the frequency-voltage plane, the voltage dependence of the azimuthal rotation angle, the voltage and frequency dependence of the wavelength of the prewavy pattern, and the director field in the prewavy pattern are provided. This prewavy pattern always evolves into the so-called chevrons above onset of convection. The wavelength of the chevrons and the orientation of their alternating zig and zag rolls depend on the director structure of the prewavy pattern.

Original languageEnglish
Pages (from-to)111-122
Number of pages12
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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