We design and fabricate arrays of diffractive optical elements (DOEs) to realize neutral atom micro-traps for
quantum computing. We initialize a single atom at each site of an array of optical tweezer traps for a customized
spatial configuration. Each optical trapping volume is tailored to ensure only one or zero trapped atoms.
Specifically designed DOEs can define an arbitrary optical trap array for initialization and improve collection
efficiency in readout by introducing high-numerical aperture, low-profile optical elements into the vacuum
We will discuss design and fabrication details of ultra-fast collection DOEs integrated monolithically and coaxially
with tailored DOEs that establish an optical array of micro-traps through far-field propagation. DOEs, as mode
converters, modify the lateral field at the front focal plane of an optical assembly and transform it to the desired field
pattern at the back focal plane of the optical assembly. We manipulate the light employing coherent or incoherent
addition with judicious placement of phase and amplitude at the lens plane. This is realized through a series of
patterning, etching, and depositing material on the lens substrate. The trap diameter, when this far-field propagation
approach is employed, goes as 2.44λF/#, where the F/# is the focal length divided by the diameter of the lens
aperture. The 8-level collection lens elements in this presentation are, to our knowledge, the fastest diffractive
elements realized; ranging from F/1 down to F/0.025.