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arXiv · 1811.11449

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

Amit Raj Dhawan·Cherif Belacel·Juan U. Esparza-Villa·Michel Nasilowski·Zhiming Wang·Catherine Schwob·Jean-Paul Hugonin·Laurent Coolen·Benoît Dubertret·Pascale Senellart·Agnès Maître
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Abstract

Plasmonic antennas are attractive optical structures for many applications in nano and quantum technologies. By providing enhanced interaction between a nanoemitter and light, they efficiently accelerate and direct spontaneous emission. 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 an extremely high Purcell factor (>72) and brightness enhancement by a factor of 70. Due to the unprecedented quenching of Auger processes and the strong acceleration of multiexciton emission, more than 4 photons per pulse can be emitted by a single quantum dot. Our technology permits the fabrication of bright room-temperature single-emitter sources emitting either multiple or single photons.

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Amit Raj Dhawan, Cherif Belacel, Juan U. Esparza-Villa, Michel Nasilowski, Zhiming Wang, Catherine Schwob, Jean-Paul Hugonin, Laurent Coolen, Benoît Dubertret, Pascale Senellart, Agnès Maître. 2018-11-28. Extreme multiexciton emission from deterministically assembled single emitter subwavelength plasmonic patch antennas. https://arxiv.org/abs/1811.11449

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