Optical investigation of the Goldstone mode in free-standing films of ferroelectric smectic C* phases

Alice Becker; Horst Stegemeyer

doi:10.1117/12.299965

1 February 1998 Optical investigation of the Goldstone mode in free-standing films of ferroelectric smectic C* phases

Alice Becker, Horst Stegemeyer

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.299965
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

A new method for investigating the dynamics in free-standing films of ferroelectric liquid crystal in the range of 5 Hz to 10⁵ Hz by means of optical reflectivity is presented. The experimental results were obtained by applying electric AC fields up to 43 V/cm to the films. By measuring the magnitude and phase of the dynamic reflectivity, a relaxation process was found at frequencies below 1 kHz originating from the Goldstone mode. In a 73 layer film the process is still detected several degrees above the bulk phase transition temperature S_C* to S_A, which can be understood by a surface ordering effect.

Citation Download Citation

Alice Becker and Horst Stegemeyer "Optical investigation of the Goldstone mode in free-standing films of ferroelectric smectic C* phases", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299965

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