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arXiv · 2410.22469

Metalens formed by structured arrays of atomic emitters

Francesco Andreoli·Charlie-Ray Mann·Alexander A. High·Darrick E. Chang
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Abstract

Arrays of atomic emitters have proven to be a promising platform to manipulate and engineer optical properties, due to their efficient cooperative response to near-resonant light. Here, we theoretically investigate their use as an efficient metalens. We show that, by spatially tailoring the (sub-wavelength) lattice constants of three consecutive two-dimensional arrays of identical atomic emitters, one can realize a large transmission coefficient with arbitrary position-dependent phase shift, whose robustness against losses is enhanced by the collective response. To characterize the efficiency of this atomic metalens, we perform large-scale numerical simulations involving a substantial number of atoms ($N\sim 5\times 10^5$) that is considerably larger than comparable works. Our results suggest that low-loss, robust optical devices with complex functionalities, ranging from metasurfaces to computer-generated holograms, could be potentially assembled from properly engineered arrays of atomic emitters.

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Francesco Andreoli, Charlie-Ray Mann, Alexander A. High, Darrick E. Chang. 2024-10-29. Metalens formed by structured arrays of atomic emitters. https://doi.org/10.1515/nanoph-2024-0603

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