Optical Properties of Concentric Nanorings of Quantum Emitters
- URL: http://arxiv.org/abs/2301.07756v1
- Date: Wed, 18 Jan 2023 19:45:06 GMT
- Title: Optical Properties of Concentric Nanorings of Quantum Emitters
- Authors: Verena Scheil, Raphael Holzinger, Maria Moreno-Cardoner, Helmut Ritsch
- Abstract summary: 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.
This creates collective excitations with significant contributions from all three rings as a vital ingredient for efficient and fast coherent inter-ring transport.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: 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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