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Electron micrograph showing the side view of a three-dimensional macroporous silicon structure.
Chemical structures of the nematic polymer ASY 10 (a), and the dichroic dye BTBP (b).
(a) Calculated director field. The appearing disclination rings are of strength (waist of the pore) and of strength (neck of the pore). (b)–(e) Calculated [(b) and (d)] and experimental [(c) and (e)] FCPM images of modulated silicon pores with a maximal diameter of . The plane of polarization is parallel [(b) and (c)] and perpendicular [(d) and (e)] to the pore axis, respectively. The simulated patterns are obtained by integrating the intensity of light over a distance of which corresponds to the optical resolution in direction.
(a) FCPM picture of a liquid crystalline rod. The angle between the plane of polarization and the pore axis is . (b) Simulated pattern.
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