Ferroelectric liquid crystalline polysiloxanes designed for high second-order nonlinear susceptibilities

✍ Scribed by Erik Wischerhoff; Rudolf Zentel; Maura Redmond; Olivier Mondain-Monval; Harry Coles

• Book ID: 102939127
• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 614 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950511

✦ Synopsis

Abstract

Ferroelectric liquid crystalline (FLC) copolysiloxanes containing suitable comonomers (“NLO‐chromophores”) for second harmonic generation (SHG) have been prepared. Their important feature is a donor‐acceptor π‐system sited perpendicular to the long axis of the side‐group moieties in order to adopt the polar ordering of the ferroelectric LC phase. The influences of the mesogen structure and of the content of NLO‐chromophores on the liquid crystalline and ferroelectric properties are studied. The desired chiral smectic C^*^ phase is retained up to 30 mol‐% of chromophore. Also, first measurements of second harmonic generation have been performed.