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Chip-scale light-atom interactions are vital for the miniaturization ofatomic sensing systems, including clocks, magnetometers, gyroscopes and more.Combining as many photonic elements as possible onto a photonic chip greatlyreduces size and power consumption, where the critical elements are thoseinterfacing between the 2D circuit and the 3D vapor cell. We introduce a newdesign method for large scale two-dimensional converter structures, enablingout-coupling of radiation from the photonic chip into the atomic medium. Thesestructures allow light intensity and phase spatial distribution andpolarization control, without external light-manipulating elements. Large,100x100 {\mu}m2 structures were designed generating low divergence opticalbeams with high degree of circular polarization. Simulations obtain meancircular polarization contrast of better than 30 dB.

Two-Dimensional Quasi Periodic Structures for Large-Scale Light Out-coupling with Amplitude, Phase and Polarization Control