Abstract
We demonstrate an efficient method to design the diffractive phase element for modulating the electric field at the out-of-focus plane of a lens system by using an equivalent Fresnel diffraction in free space. In the monochromatic illumination, we show an example to certify the validity of our method experimentally. In the nonmonochromatic illumination, we theoretically display that the spectral beam splitting and highly confined intensity can be obtained simultaneously at the out-of-focus plane, which has the potential in the solar concentrating system and optical encryption.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Zhe Kong, Ning Xu, Huan Xiao, and Qiaofeng Tan
Appl. Opt. 59(11) 3427-3431 (2020)
Rong Liu, Ben-Yuan Gu, Bi-Zhen Dong, and Guo-Zhen Yang
J. Opt. Soc. Am. A 15(3) 689-694 (1998)
Xuegong Deng and Ray T. Chen
Opt. Lett. 25(14) 1046-1048 (2000)