Metalens formed by structured arrays of atomic emitters

• URL: http://arxiv.org/abs/2410.22469v1
• Date: Tue, 29 Oct 2024 19:02:28 GMT
• Title: Metalens formed by structured arrays of atomic emitters
• Authors: Francesco Andreoli, Charlie-Ray Mann, Alexander A. High, Darrick E. Chang,
• Abstract summary: Arrays of atomic emitters have proven to be a promising platform to manipulate and engineer optical properties. 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.
• Score: 41.94295877935867
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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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