Quantum dot single photon source on SiN integrated with coupled crossover waveguides
Abstract
Abstract Hybrid integration of InAs/GaAs quantum dot (QD) single-photon sources (SPSs) is a promising approach for introducing quantum light into SiN photonic integrated circuits. However, the large refractive-index mismatch between GaAs and SiN poses a challenge for efficient optical coupling. Here, we propose and experimentally demonstrate hybrid integration of an InAs/GaAs QD-SPS on SiN using a coupled crossover waveguide structure. A photonic crystal nanocavity is employed for coupling QD emission into a GaAs waveguide, which efficiently transfers photons to a SiN waveguide at the crossover section. We observed Purcell-enhanced single-photon emission, on-chip propagation, and outcoupling through a SiN grating coupler.
Fields of Study & Subjects
Photonic and Optical Devices
Semiconductor Quantum Structures and Devices
Photonic Crystals and Applications
Publication details
- Journal / source
- Applied Physics Express
- Volume
- 19
- Issue
- 2
- Pages
- 021004–021004
- Publication date
- 1 February 2026
- Language
- EN