Non-linear electrooptical effects in chiral liquid crystals

• Autorzy: Dardas D. , Kuczyński W.
• Konferencja: XV Liquid Crystal Conference: Chemistry, Physics and Applications ; (15 ; 12-17.10-2003 ; Zakopane, Poland)
• Języki publikacji: EN

Abstrakty

EN

We studied the electrooptical effects in ferroelectric liquid crystals at both the fundamental and the second harmonic frequency. The linear effects caused mainly by the changes in optic axis position give rise to the changes in the intensity of light passing the sample placed between crossed polarizers. The electric field causes also changes in the shape of the indicatrix. Both mentioned effects influence the second harmonic response. We observed that the defects present in ferroelectric liquid crystal sample affect the electrooptical response to a large extent. This influence is especially significant for the second order harmonics. The depth of light modulation depends on kind of alignment (bookshelf or chevron).

Słowa kluczowe

EN

liquid crystals; smectics; ferroelectricity; defects; alignment; electrooptical effects

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2004
• Tom: Vol. 12, No. 3
• Strony: 277--280
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Dardas D.

• Institute of Molecular Physics, Polish Academy of Sciences, 17 Smoluchowskiego Str., 60-179 Poznań, Poland

autor

Kuczyński W.

• Institute of Molecular Physics, Polish Academy of Sciences, 17 Smoluchowskiego Str., 60-179 Poznań, Poland

Bibliografia

• 1. S.T. Lagerwall, Ferroelectric and Antiferroelctric Liquid Crystals, Wiley-VCH, Weinheim, 1999.
• 2. M. Born and E. Wolf, Principles of Optics, Pergamon Press, London 1959.
• 3. H. Orihara and Y. Ishibashi, “Electro-optic effect and third-order nonlinear dielectric response in antiferroelectric liquid crystals”, J. Phys. Soc. Jap. 64, 3775 (1995).
• 4. W. Kuczyński, D. Dardas, F. Goc, and R. Dąbrowski, “Linear and quadratic electrooptic effects in antiferroelectric liquid crystals”, Ferroelectrics 274, 191-199 (2000).
• 5. W. Kuczyński, “Electrooptical studies of relaxation processes in chiral smectic liquid crystals”, in Relaxation Phenomena, pp. 422-444, edited by W. Haase and S. Wróbel, Springer-Verlag, Berlin, 2003.