Multidimensional multiplexing holography based on optical orbital angular momentum lattice multiplexing

Abstract

.The use of orbital angular momentum (OAM) as an independent dimension for information encryption has garnered considerable attention. However, the multiplexing capacity of OAM is limited, and there is a need for additional dimensions to enhance storage capabilities. We propose and implement orbital angular momentum lattice (OAML) multiplexed holography. The vortex lattice (VL) beam comprises three adjustable parameters: the rotation angle of the VL, the angle between the wave normal and the z axis, which determines the VL’s dimensions, and the topological charge. Both the rotation angle and the VL’s dimensions serve as supplementary encrypted dimensions, contributing azimuthally and radially, respectively. We investigate the mode selectivity of OAML and focus on the aforementioned parameters. Through experimental validation, we demonstrate the practical feasibility of OAML multiplexed holography across multiple dimensions. This groundbreaking development reveals new possibilities for the advancement of practical information encryption systems.

Tunable Near and Mid-Infrared (1.3–5 µm) Picosecond Pulsed Optical Vortex Parametric Oscillator

“…When theoretically describing these beams, these characteristics manifest in an azimuthal phase term, e ilΦ , where l represents the OAM [1,2]. Optical vortex beams have found a use in applications including optical communications [3,4], optical trapping [2], ultrafast closed-loop spectroscopy [5,6], quantum optics [7][8][9][10], and fine trapping and rotation of particles [11,12]. Optical vortex beams have the capacity to impart momentum to physical media and can twist materials to produce novel micro-and nano-structures which may be useful for new technologies such as chiral-sensitive nano-imaging systems and planar metamaterials [13,14].…”