Title: Generalized mean gratings

Biography:

Shaohua Tao is a Professor of School of Physics and Electronics, Central South University, and deputy director of Hunan Key Laboratory of Super Microstructure and Ultralfast Process, China. He has authored and coauthored more than 80 refereed papers in international journals. His research interests are micro- and nano-optical devices, optical beam shaping, and optical tweezers.

Abstract

A generalized mean grating (GMG) is proposed to generate two first-order diffraction peaks with the generalized mean, which includes the m-golden mean, precious mean, and so on. The construction method of the GMG is illustrated in detail. The focusing properties of the proposed gratings have been also studied in the simulations and experiments. The proposed grating has the potential application in the field of far-field super-resolution imaging.