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 photonics 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 ($<10nm$) 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 $\sim 16\times$, an effect accompanied by an up to $3.4\times$ Purcell-enhanced spontaneous emission rate. Moreover, the emission is strongly polarised along the antenna axis with degrees of linear polarisation up to $\sim 85\%$. The results unambiguously demonstrate the efficient 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 efficent nano-lasers.

References in corpus (4)

• Photonic quantum technologies
• Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method
• Optical properties and interparticle coupling of plasmonic bowtie nanoantennas on a semiconducting substrate
• Imaging surface plasmon polaritons using proximal self-assembled InGaAs quantum dots

Cited by in corpus (3)

• Theory and limits of on-demand single photon sources using plasmonic resonators: a quantized quasinormal mode approach
• Dissipative modes, Purcell factors and directional beta factors in gold bowtie nanoantenna structures
• On-demand continuous-variable quantum entanglement source for integrated circuits