Journal
ACS NANO
Volume 14, Issue 9, Pages 12027-12036Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c05233
Keywords
Purcell enhancement; single-photon sources; quantum dots; hybrid cavity-antenna systems; plasmonics; microcavities
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Funding
- [NWO-Vici] [680.47.621]
- Dutch Research Council (NWO)
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Localizing light to nanoscale volumes through nanoscale resonators that are low loss and precisely tailored in spectrum to properties of matter is crucial for classical and quantum light sources, cavity QED, molecular spectroscopy, and many other applications. To date, two opposite strategies have been identified: to use either plasmonics with deep subwavelength confinement yet high loss and very poor spectral control or instead microcavities with exquisite quality factors yet poor confinement. In this work we realize hybrid plasmonic-photonic resonators that enhance the emission of single quantum dots, profiting from both plasmonic confinement and microcavity quality factors. Our experiments directly demonstrate how cavity and antenna jointly realize large cooperative Purcell enhancements through interferences. These can be controlled to engineer arbitrary Fano lineshapes in the local density of optical states.
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