A hexagonal array not only is a nature-preferred pattern but also is widely used in optoelectronical materials and devices. We report a simple method of hexagonal array illumination based on the Talbot effect that has a theoretical efficiency of 100%. An experimental efficiency of 90.6% with a binary phase (0, π) hexagonal grating is given. This method should be highly interesting for applications of hexagonal array illumination in optical devices as well as in other hexagonal cells.
© 2002 Optical Society of America
Peng Xi, Changhe Zhou, Enwen Dai, and Liren Liu, "Generation of near-field hexagonal array illumination with a phase grating," Opt. Lett. 27, 228-230 (2002)