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Generation of mm- and Sub mm-wave Bessel Beams Using DOE’s Designed by BOR-FDTD Method and MGA

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An Erratum to this article was published on 14 April 2009

Abstract

A new way for generating Bessel beams at mm and sub mm-wavelengths is presented in this paper, in which diffractive optical elements (DOE’s) are designed for converting incident Gaussian beams into Bessel beams. In order to reduce the computational burden and therefore improve the design efficiency, two measures are adopted in our design. One is a body-of-revolution finite-difference time-domain (BOR-FDTD) method that uses a two-dimensional (2-D) solution space instead of a full 3-D space and thereby saves tremendous computational resources, and that is utilized to calculate the fields diffracted by the DOE’s. The other is a microgenetic algorithm (MGA) that has been proved to be more effective than the conventional GA, and that is employed for accelerative optimization. The utility of the present design tool, which combines a MGA with a BOR-FDTD method, is demonstrated by three examples. Numerical simulation results indicate that the designed DOE’s can not only flexibly generate zero- or higher- order Bessel beams when compared with axicons, but also have higher diffraction efficiencies when compared with amplitude holograms.

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Acknowledgements

This work is supported by NSFC under grant 60621002, and the Natural Science Foundation of Fujian Province of China (No.A0610027).

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Authors and Affiliations

  1. State Key Lab of Millimeter Waves, Southeast University, Nanjing, Jiangsu, 210096, China

    Y. Z. Yu & W. B. Dou

  2. School of Science, Quanzhou Normal University, Quanzhou, Fujian, 362000, China

    Y. Z. Yu

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  1. Y. Z. Yu
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  2. W. B. Dou
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Correspondence to Y. Z. Yu.

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An erratum to this article can be found at http://dx.doi.org/10.1007/s10762-009-9497-3

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Yu, Y.Z., Dou, W.B. Generation of mm- and Sub mm-wave Bessel Beams Using DOE’s Designed by BOR-FDTD Method and MGA. J Infrared Milli Terahz Waves 30, 172–182 (2009). https://doi.org/10.1007/s10762-008-9434-x

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  • DOI: https://doi.org/10.1007/s10762-008-9434-x

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