  Up to date, self-assembled semiconductor quantum dot-based non-classical
single-photon emitters operating in the long-wavelength telecom bands (>1460
nm) were investigated separately from the Si platform despite their great
potential for heterogeneous integration with the silicon-based quantum photonic
chips. Here, we demonstrate a novel, robust, cost-effective, and
industry-compatible approach for achieving a single-photon emitter based on an
InAs/InP quantum dot heterogeneously integrated with the Si platform. We show
that by simplifying the device architecture and employing a metallic mirror
beneath the emitter instead of a monolithic Bragg reflector, obtained photon
extraction efficiency from the emitter reaches 10% with room for further
improvement, which is a very competitive measure for the up-to-date solutions.
The device architecture and its fabrication procedure led to single-photon
generation purity above 98% at the liquid helium temperature and triggered
operation mode and 75% at 80 K.
