Second-harmonic generation studies in the SmCP phase of bent-shaped mesogens

Vladimíra Novotná; Jan Kroupa; Miroslav Kašpar; Milada Glogarová; Vera Hamplová

doi:10.1117/12.723130

9 May 2007 Second-harmonic generation studies in the SmCP phase of bent-shaped mesogens

Vladimíra Novotná, Jan Kroupa, Miroslav Kašpar, Milada Glogarová, Vera Hamplová

Proceedings Volume 6587, Liquid Crystals and Applications in Optics; 65871H (2007) https://doi.org/10.1117/12.723130
Event: International Congress on Optics and Optoelectronics, 2007, Prague, Czech Republic

Abstract

We have studied several compounds of non-chiral mesogens composed of symmetrically and non-symmetrically bent-shaped molecular core with thermally stable ester linkages and laterally substituted by methoxy group. Recently, mesomorphic properties have been described and the SmCP (B₂) phase has been identified in a wide temperature range below the isotropic phase. Additionally, symmetrical bent-shaped mesogens exhibit the B₇ phase on cooling from the B₂ phase. Herein we concentrated on nonlinear optical properties in the observed mesophases. Second harmonic generation (SHG) supports the idea that the ground state of the B₂ phase in studied bent-shaped mesogens has antiferroelectric character and demonstrates the switching from antiferroelectric to ferroelectric state under applied electric field.

Citation Download Citation

Vladimíra Novotná, Jan Kroupa, Miroslav Kašpar, Milada Glogarová, and Vera Hamplová "Second-harmonic generation studies in the SmCP phase of bent-shaped mesogens", Proc. SPIE 6587, Liquid Crystals and Applications in Optics, 65871H (9 May 2007); https://doi.org/10.1117/12.723130

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