Efficient nano-photonic antennas based on dark states in quantum emitter rings

Moreno-Cardoner, M.; Holzinger, Raphael; Ritsch, Helmut

doi:10.1364/oe.437396

Cited by 19 publications

(9 citation statements)

References 84 publications

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“…A different type of periodic array with a planar geometry is formed by a regular polygon (nanoring), or by multiple polygons within a plane [142,[194][195][196][197][198]. The LLI excitation eigenmodes of a single nanoring exhibit distinct characteristics.…”

Section: H Atomic Nanoringsmentioning

confidence: 99%

Cooperative quantum-optical planar arrays of atoms

Ruostekoski

2023

Phys. Rev. A

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Atomic planar arrays offer a novel emerging quantum-optical many-body system in which light mediates strong interactions between the atoms. The regular lattice structure provides a cooperatively enhanced lightmatter coupling and allows for increased control and harnessing of these interactions. In subwavelength arrays, coherent scattering of incident light beams can be highly collimated in the forward and backward direction, resembling one-dimensional light propagation without the need for waveguides, fibers, or resonators. The atomic planar arrays share common features with fabricated metasurfaces, formed by thin nanostructured films that have shown great promise in manipulating and structuring classical light. Here we describe theoretical methods commonly employed to analyze the cooperative responses of atomic arrays and explore some recent developments and potential future applications of planar arrays as versatile quantum interfaces between light and matter.

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Section: H Atomic Nanoringsmentioning

confidence: 99%

Cooperative quantum-optical planar arrays of atoms

Ruostekoski

2023

Phys. Rev. A

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“…In this case the collective optical modes of the ring play the role of the cavity modes and the central atom acts as the gain medium when incoherently pumped. Furthermore, if the central emitter is absorptive, the system can be tailored to achieve a strong absorption cross section way beyond the single atom case, while the outer ring behaves as a parabolic mirror when illuminated externally by a coherent light field [33].…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Concentric Nanorings of Quantum Emitters

Scheil¹,

Holzinger²,

Moreno-Cardoner³

et al. 2023

Preprint

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A ring of sub-wavelength spaced dipole-coupled quantum emitters features extraordinary optical properties when compared to a one-dimensional chain or a random collection of emitters. One finds the emergence of extremely subradiant collective eigenmodes similar to an optical resonator, which feature strong 3D sub-wavelength field confinement. Motivated by structures commonly appearing in natural light harvesting complexes, we extend these studies to stacked concentric multi-ring geometries. We predict that double rings allow to engineer significantly darker and better confined collective excitation states over a broader energy band compared to the single ring case. These potentially enhance weak field absorption and low loss excitation energy transport. For the specific geometry of the three rings appearing in the natural LH2 antenna we show that the coupling between the lower double ring structure and the higher energy blue shifted single ring is very close to a critical value for the actual size of the molecule. This creates collective excitations with significant contributions from all three rings as a vital ingredient for efficient and fast coherent inter-ring transport. Such a geometry thus should prove useful for the design of sub-wavelength weak field antennas.

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“…1. [2][3][4] The corresponding absorption cross section as function of ring size and center loss rate is depicted in Fig. 2.…”

Section: Introductionmentioning

confidence: 99%