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4 October 2023 Minimalistic quantum devices build of dipole-coupled nanoscopic arrays of quantum emitters
Helmut Ritsch, Raphael Holzinger
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Proceedings Volume 12746, SPIE-CLP Conference on Advanced Photonics 2023; 1274603 (2023) https://doi.org/10.1117/12.2687698
Event: SPIE-CLP Conference on Advanced Photonics, 2023, San Diego, California, United States
Abstract
Subwavelength arrays of quantum emitters feature unique and largely design-able nonlinear optical properties. As a generic example we study a sub-wavelength sized ring of identical dipoles with an extra identical absorbing emitter at the center. For a 9-ring one finds the most efficient antenna configuration to direct single incoming photons to the center without re-emission. Interestingly, for very tiny structures sizes below a tenth of a wavelength, a full quantum description predicts an even larger absorption enhancement than a mean field model using a classical dipole approximation. We identify the origin of the enhancement in the appearance of a collective dark state with dominant center occupation. By special design of the center absorber one thus can harness the same efficiency enhancement also at different wavelengths and for other geometric structures. On the one hand this idea could be the basis of a new generation of highly efficient and selective nano antennas, while on the other hand, it could be an important piece towards understanding the surprising efficiency of natural light harvesting molecules. Adding gain via active dipoles in such nano ring systems allows to design minimalist laser like classical light sources. In the nonlinear operating regime at stronger pump fields these systems transform to non-classical light sources with tailor-able spatio-temporal emission upon coherent illumination.
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(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Helmut Ritsch and Raphael Holzinger "Minimalistic quantum devices build of dipole-coupled nanoscopic arrays of quantum emitters", Proc. SPIE 12746, SPIE-CLP Conference on Advanced Photonics 2023, 1274603 (4 October 2023); https://doi.org/10.1117/12.2687698
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KEYWORDS
Quantum emitters
Photons
Quantum devices
Absorption
Quantum enhancement
Quantum systems
Quantum fields
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