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Updated: Sep 28, 2025

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Tunable Directional Emission and Collective Dissipation with Quantum Metasurfaces.

D Fernández-Fernández^1,2, A González-Tudela¹

¹Institute of Fundamental Physics IFF-CSIC, Calle Serrano 113b, 28006 Madrid, Spain.

Physical Review Letters

|April 1, 2022

Summary

This summary is machine-generated.

Quantum metamaterials enable tunable directional emission and collective couplings by harnessing subradiant excitations in atomic arrays. This research optimizes atomic positions and dipole orientations for enhanced quantum optical phenomena.

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Area of Science:

Quantum optics
Condensed matter physics
Metamaterials

Background:

Subwavelength atomic arrays exhibit strong interference, leading to subradiant excitations with long lifetimes.
These quantum metamaterials offer a novel platform for exploring quantum optical phenomena.

Purpose of the Study:

To demonstrate tunable directional emission patterns and collective dissipative couplings using subradiant excitations.
To optimize atomic array geometry and auxiliary atom placement for enhanced quantum effects.

Main Methods:

Characterization of optimal square atomic array geometries for directional emission.
Identification of optimal auxiliary atom positions for efficient coupling to subradiant metasurface excitations.
Investigation of strategies like entangled atomic clusters and bilayers for improvement.
Analysis of relative dipole orientation effects on emission directionality.

Main Results:

Optimal square array geometries for directional emission were identified.
Effective atomic positions for coupling to subradiant excitations were determined.
Control over emission directionality via relative dipole orientation was demonstrated.
Directional emission patterns were shown to translate into collective, anisotropic dissipative couplings.

Conclusions:

Subwavelength atomic arrays can be engineered for tunable quantum optical phenomena.
Harnessing subradiant excitations allows for control over directional emission and collective couplings.
Entangled atomic clusters and bilayers offer pathways for improving these quantum effects.