J. Phys. III France
Volume 4, Numéro 2, February 1994
Page(s) 387 - 400
DOI: 10.1051/jp3:1994121
J. Phys. III France 4 (1994) 387-400

Efficient nonlinear optical ferroelectric liquid crystals for integrated optics devices

K. Schmitt, C. Benecke, M. Schadt, J. Fünfschilling, R. P. Herr and R. Buchecker

F. Hoffmann-La Roche Inc., Dept. RLCR, 4002 Basel, Switzerland

(Received 9 July 1993, accepted 19 November 1993)

The linear electro-optical effect of a novel ferroelectric liquid crystal (FLC) with exceptionally large and stable second order nonlinear optical (nlo) response ( d22 = 5 pm/V) is investigated. The electro-optical coefficients rIJ are compared with the corresponding nlo coefficients dJI. It is shown that the electro-optical effect is mainly of electronic origin. This indicates that molecular motions of the nlo-FLC are negligible below its glass transition temperature. Moreover, waveguiding in planar short pitch bistable ferroelectric (SBF) configurations comprising the new nlo-FLC material is demonstrated.

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