August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【411】Efficient frequency selective single photon antennas based on a bio-inspired nano-scale atomic ring design with 9-fold symmetry

Aug 31, 2021, 4:30 PM
Room E

Room E

Talk Atomic Physics and Quantum Optics Atomic Physics and Quantum Optics


Prof. Helmut Ritsch (Universität Innsbruck)


Quantum emitters forming nanoscopic polygon shaped arrays posses sub-radiant states with an exciton lifetime growing exponentially with emitter number. Placing an extra resonant dipole as absorber at the ring center creates a highly efficient single photon antenna. Interestingly for exactly nine emitters in a nonagon, as it appears in a biological light harvesting complex LHC2, we find a distinct minimum for its most dark state decay rate and a maximum of the effective absorption cross section, surpassing that for a single absorptive emitter. The dark state has dominant center occupation facilitating efficient energy absorption and fast transport. The ring concentrates incoming radiation a the centerand minimizes transport loss and time.

Primary authors

Prof. Helmut Ritsch (Universität Innsbruck) Dr Maria Moreno-Cardoner Mr Raphael Holzinger (Universität Innsbruck )

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