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...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 ultracompact light sources.展开更多
基金supported by the regional funding DIM NanoK through the project PATCH.
文摘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 ultracompact light sources.
