Encoding generalized phase functions on Dammann gratings.
We extend the Dammann encoding concept to more general phase functions, i.e., to encode a phase pattern so that a number of diffracted orders have the same intensity. We demonstrate a Dammann vortex grating that generates different vortex patterns in the different diffracted orders. We also show a Fresnel lens that creates seven transverse focal spots in each of seven axial planes.
Moreno
Ignacio
I
Departamento Ciencia de Materiales, Optica y Tecnología Electrónica, Universidad Miguel Hernández, E03202 Elche, Spain. i.moreno@umh.es
Davis
Jeffrey A
JA
Cottrell
Don M
DM
Zhang
N
N
Yuan
X-C
XC