title: Monolithically integrated single quantum dots coupled to bowtie nanoantennas.
abstract: Deterministically integrating semiconductor quantum emitters with plasmonic nano-devices paves the way towards chip-scale integrable, true nanoscale quantum photonic technologies. For this purpose, stable and bright semiconductor emitters are needed, which moreover allow for CMOS-compatibility and optical activity in the telecommunication band. Here, we demonstrate strongly enhanced light-matter coupling of single near-surface (< 10 nm) InAs quantum dots monolithically integrated into electromagnetic hot-spots of sub-wavelength sized metal nanoantennas. The antenna strongly enhances the emission intensity of single quantum dots by up to ~ 16×, an effect accompanied by an up to 3.4× Purcell-enhanced spontaneous emission rate. Moreover, the emission is strongly polarised along the antenna axis with degrees of linear polarisation up to ~ 85 %. The results unambiguously demonstrate a pronounced coupling of individual quantum dots to state-of-the-art nanoantennas. Our work provides new perspectives for the realisation of quantum plasmonic sensors, step-changing photovoltaic devices, bright and ultrafast quantum light sources and efficient nano-lasers.
authors.forename: A A
authors.initials: AA
authors.lastname: Lyamkina
authors.forename: K
authors.initials: K
authors.lastname: Schraml
authors.forename: A
authors.initials: A
authors.lastname: Regler
authors.forename: M
authors.initials: M
authors.lastname: Schalk
authors.forename: A K
authors.initials: AK
authors.lastname: Bakarov
authors.forename: A I
authors.initials: AI
authors.lastname: Toropov
authors.forename: S P
authors.initials: SP
authors.lastname: Moshchenko
authors.forename: Michael
authors.initials: M
authors.lastname: Kaniber