Multilevel diffractive elements for generalized wavefront shaping

Yochay Danziger; Erez Hasman; Asher A. Friesem; Adolf W. Lohmann

doi:10.1117/1.600859

1 September 1996 Multilevel diffractive elements for generalized wavefront shaping

Yochay Danziger, Erez Hasman, Asher A. Friesem, Adolf W. Lohmann

Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600859

A new approach to designing computer-generated multilevel diffractive elements, in which the phase and the amplitude of the output wavefront can be controlled independently, is presented. In this approach the diffraction efficiency of the elements can be arbitrarily controlled to reach 100% efficiency over the entire element. The approach is based on varying the local diffraction efficiency by changing the width and the number of levels in every period. To reduce complexity, an algorithm for designing the element with the least number of levels and masks is developed. This design algorithm determines the needed mask parameters in which compensation for distortions introduced by the lithographic recording of the element are taken into account. Calculated and experimental investigations that confirm the new design approach are presented.

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Yochay Danziger, Erez Hasman, Asher A. Friesem, and Adolf W. Lohmann "Multilevel diffractive elements for generalized wavefront shaping," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600859

Published: 1 September 1996

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