Generation and Talbot Effect of Optical Vortex Lattices with High Orbital Angular Momenta

Abstract

Optical vortex lattices (OVLs) are gaining increased research attention owing to their unique features related to intensity and phase structure. Interference is a common method for generating an OVL. However, the topological charge (TC) of a single building block in an OVL is fixed and cannot be modulated, thereby limiting its applicability. This study entailed the use of phase multiplication to generate a high‐order OVL to facilitate the arbitrary modulation of its TC. The generated high‐order OVL exhibited the Talbot effect during transmission, and it transformed into a super‐honeycomb lattice at specific fractional Talbot lengths. In addition, an orbital angular momentum developed in the OVL; this has broad application prospects in optical micromanipulation. Further, a method for generating super‐honeycomb lattices is devised. The findings of this study enhances understanding of the Talbot effect and broaden the practical applicability of OVLs.

Multiplying vortex beams by diffraction from almost periodic structures: Theory and experiment

“…[12][13][14] Diffraction from a phase mask, often encoded onto a liquid-crystal spatial light modulator (SLM), has been employed to generate arrays of vortex beams in various configurations. [15][16][17][18][19][20][21][22] In principle, phase holograms, [23][24][25][26][27] Dammann gratings, 28 direct shaping with axicon 29 or spiral phase arrays, 30,31 or combinations thereof can be used to generate vortex arrays (lattices). In addition, the generation of optical vortex arrays by multiplexing metasurface design is introduced in Ref.…”