  Silicon, a ubiquitous material in modern computing, is an emerging platform
for realizing a source of indistinguishable single-photons on demand. The
integration of recently discovered single-photon emitters in silicon into
photonic structures, is advantageous to exploit their full potential for
integrated photonic quantum technologies. Here, we show the integration of
telecom photon emitters in a photonic platform consisting of silicon
nanopillars. We developed a CMOS-compatible nanofabrication method, enabling
the production of thousands of individual nanopillars per square millimeter
with state-of-the-art photonic-circuit pitch, all the while being free of
fabrication-related radiation damage defects. We found a waveguiding effect of
the 1278 nm-G center emission along individual pillars accompanied by improved
brightness, photoluminescence signal-to-noise ratio and photon extraction
efficiency compared to that of bulk silicon. These results unlock clear
pathways to monolithically integrating single-photon emitters into a photonic
platform at a scale that matches the required pitch of quantum photonic
circuits.
