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A reflectometric method to measure the azimuthal anchoring energy of a nematic liquid crystal |
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| Authors: | S Faetti V Palleschi A Schirone |
| Institution: | (1) Dipartimento di Fisica dell’Università e Gruppo Nazionale di Struttura della Materia del CNR, Piazza Torricelli 2, 56 100 Pisa, Italia;(2) Dipartimento di Fisica dell’Università di Pisa, Piazza Torricelli 2, 56 100 Pisa, Italia;(3) Istituto di Fisica Atomica e Molecolare del CNR, Via del Giardino 7, 56 100 Pisa, Italia;(4) Dipartimento di Fisica dell’Università, Piazza Torricelli 2, 56 100 Pisa, Italia |
| Abstract: | Summary A new reflectometric method to measure the azimuthal anchoring energy at the interface between a nematic liquid crystal and an isotropic method is proposed. The spurious contribution to the reflectivity coefficients due to the presence of a director-field distortion near the interface is calculated by using the numerical Berreman algorithm and is shown to be negligible for magnetic fields small enough (H<10 kG). Preliminary measurements of the azimuthal anchoring energy at the interface between the NLC 5CB and a rubbed glass plate are given. Research supported in part by MPI and in part by CNR. |
| Keywords: | Liquid crystals |
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