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Extreme multiexciton emission from deterministically assembled single-emitter subwavelength plasmonic patch antennas

Abstract : Coupling nano-emitters to plasmonic antennas is a key milestone for the development of nanoscale quantum light sources. One challenge, however, is the precise nanoscale positioning of the emitter in the structure. Here, we present a laser etching protocol that deterministically positions a single colloidal CdSe/CdS core/shell quantum dot emitter inside a subwavelength plasmonic patch antenna with three-dimensional nanoscale control. By exploiting the properties of metal-insulator-metal structures at the nanoscale, the fabricated single-emitter antenna exhibits a very high-Purcell factor (>72) and a brightness enhancement of a factor of 70. Due to the unprecedented quenching of Auger processes and the strong acceleration of the multiexciton emission, more than 4 photons per pulse can be emitted by a single quantum dot, thus increasing the device yield. Our technology can be applied to a wide range of photonic nanostructures and emitters, paving the way for scalable and reliable fabrication of ultra-compact light sources.
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Soumis le : mardi 28 avril 2020 - 15:52:48
Dernière modification le : mardi 23 juin 2020 - 11:30:03

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Amit Raj Dhawan, Chérif Belacel, Juan Esparza-Villa, Michel Nasilowski, Zhiming Wang, et al.. Extreme multiexciton emission from deterministically assembled single-emitter subwavelength plasmonic patch antennas. Light: Science and Applications, Nature Publishing Group, 2020, 9 (1), pp.2047 - 7538. ⟨10.1038/s41377-020-0269-0⟩. ⟨hal-02557243⟩

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