Laser-Printed Plasmonic Metasurface Supporting Bound States in the Continuum Enhances and Shapes Infrared Spontaneous Emission of Coupled HgTe Quantum Dots
A. Seredin,1, K. Baryshnikova,1, M. Petrov,1, A.Sergeev,2, D. Pavlov,2, A. Kuchmizhak,2,3, E. Mitsai,2, E. Modin, 4, K. Sergeeva,5, A. Sokolova,5, S.V. Kershaw,5, A.L. Rogach,5
1 School of Physics and Engineering, ITMO University, Saint-Petersburg 197101, Russia
2 Institute of Automation and Control Processes of the FEB RAS, 5 Radio St., 690041 Vladivostok, Russia
3 Pacific Quantum Center, Far Eastern Federal University, Vladivostok, Russia
4 CIC nanoGUNE BRTA, E-20018 Donostia - San Sebastian, Spain
5 City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, PR China
Abstract
Despite numerous studies of semiconductor quantum dots as an active media for the next-generation photonic sources, thin layers with a low quantum dots concentration are still suffering from low emission efficiency and poor directivity. The enhanced light-matter interaction through coupling of quantum dots with high-Q resonators allows to overcome these drawbacks and becomes essential for development of the quantum emitters-based devices.
In this work we fabricate gold-based plasmonic metasurfaces that support quasi-BIC modes and use them to efficiently tailor the spontaneous emission of mercury telluride quantum dots. We observe a 12-fold enhancement of the photoluminescence intensity in the second-window infrared range through sequential optimization of conditions of quantum dots coupling to the plasmonic resonators. Moreover, the emission directivity was increased, indicating the achievement of a beaming effect through coupling of the emitted radiation to high-Q modes of the metasurface. Finally, via tuning the geometry of the resonators, a controllable shaping of the emission spectra was obtained.
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The article has been accepted by the journal "Advanced Functional Materials", but has not yet been published.
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Albert Seredin
School of Physics and Engineering, ITMO University, Saint-Petersburg 197101, Russia
Russia
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