  Many emerging reconfigurable optical systems are limited by routing
complexity when producing dynamic, two-dimensional (2D) electric fields. Using
a gradient-based inverse designed, static phase-mask doublet, we propose an
optical system to produce 2D intensity wavefronts using a one-dimensional (1D)
intensity Spatial Light Modulator (SLM). We show the capability of mapping each
point in a 49 element 1D array to a distinct 7x7 2D spatial distribution. Our
proposed method will significantly relax the routing complexity of 2D
sub-wavelength SLMs, possibly enabling next-generation SLMs to leverage novel
pixel architectures and new materials.
