2020 Impact factor 1.890
Soft Matter and Biological Physics


Eur. Phys. J. E 6, 157-161 (2001)

Optical activity measurements in the smectic blue phases

Eric Grelet1, Peter J. Collings2, Min-Hui Li3 and Huu-Tinh Nguyen4

1  Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, F-91405 Orsay Cedex, France
2  Department of Physics & Astronomy, Swarthmore College, Swarthmore, Pennsylvania 19081, USA
3  Institut Curie-Section de Recherche, UMR 168, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France
4  Centre de Recherche Paul Pascal, UPR 8641, Avenue Albert Schweitzer, F-33600 Pessac, France

grelet@brandeis.edu

(Received 25 May 2001)

Abstract
Optical activity measurements have been performed on the smectic blue phases ( $\rm BP_{Sm}$), which are a new kind of chiral liquid crystal. $\rm BP_{Sm}$ exhibit both three-dimensional orientational order, like the classical blue phases, and smectic positional order. Thus, they can be viewed as the three-dimensional counterpart of the twist grain boundary phases. A comparison with the optical activity of the classical blue phases is carried out, and an estimation of the $\rm BP_{Sm}$ lattice parameter is reported for the first time.

PACS
61.30.-v - Liquid crystals.
78.20.Ek - Optical activity.


© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2001