Abstract
Numerical modeling methods are used to show that the ability of a four-channel liquid-crystal modulator to form light fields with a complex intensity distribution is not restricted to contour light fields in the form of rings, ellipses, and their arcs. Light fields can be formed with an intensity distribution in a transverse plane in the form of the boundaries of squares, rhombuses, parallelograms, and octagons. The light field can be focused at definite distances from a liquid-crystal focuser into points at the corners of the corresponding quadrilateral and at its center. It is shown that the field structure can be controlled by varying the amplitudes and phases of the potentials, as well as the voltage frequencies. Possibilities of using the resulting fields in optical-manipulation tasks are discussed.
© 2017 Optical Society of America
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