Full text loading...
Schematic diagram of fabrication procedure of LC Fresnel zone plate in a circularly symmetric hybrid-aligned LC cell with a photoconductive polymer layer. Two substrates with a PVA-PVK-ITO film and a DMOAP-ITO film are combined to produce an empty cell. The PVA film is rubbed in the direction of on plane.
Experimental setup for examining the focusing properties of the LC Fresnel zone plate. P polarizer; D1 and D2 diaphragms.
Measurement of polarization-independent programmable focusing feature of the LC Fresnel zone plate: variation of first-order focusing diffraction efficiency through LC Fresnel zone plate under applied external dc voltage for incident light with various linear polarizations, at polarizing angles of 0° (triangle), 45° (circle), and 90° (square), and random polarization (rhombus).
Central part of observed images of LC Fresnel zone plate under a POM with crossed polarizers at (a) 0, (b) 2.4, and (c) . The transmission axis of the polarizer is parallel to the axis.
Article metrics loading...