Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist

Damian Pociecha*, Nataša Vaupotič, Magdalena Majewska, Ewan Cruickshank, Rebecca Walker, John M.D. Storey, Corrie T. Imrie, Cheng Wang, Ewa Gorecka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of the helix becomes comparable to the wavelength of visible light and the selective reflection of light in the visible range is observed. The photonic bandgap phenomenon is reported for achiral liquid crystals.

Original languageEnglish
Article number2103288
JournalAdvanced Materials
Early online date16 Aug 2021
Publication statusPublished - 1 Oct 2021


  • chirality
  • helical structures
  • liquid crystals
  • photonic bandgap
  • twist–bend phases


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