Cheng Yiguang, Liu Junbo, Hu Song, He Yu. Generation of Localized Hollow Beams with Photon Sieves[J]. Acta Optica Sinica, 2015, 35(7): 705003
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In order to find a simple and effective method for generation of hollow laser beams, a method of producing hollow beams with the photon sieve is proposed. The light of internal zones and external zones has destructive interference at the center of the focal plane, and hence the localized hollow beam is formed. Research on relationships between the dark spot diameter and focal length, annulus, modulation factor is carried out. Hollow beams with micron and submicron dark spot are obtained with proper focal length and annulus. The method is verified by theoretical derivation and simulation analysis. Results show that it has advantages of simple structure and minimal dark spot, especially suitable for optical tweezers, atom cooling and so on.