Enhanced light emission from Carbon Nanotubes integrated in silicon micro-resonator

TL;DR

This paper demonstrates significant photoluminescence enhancement from carbon nanotubes integrated into silicon micro-resonators, advancing the development of silicon-based light sources for telecommunications.

Contribution

It reports the first strong photoluminescence enhancement of carbon nanotubes in silicon resonators using two pumping methods, including a 26-fold efficiency increase with collinear pumping.

Findings

26-fold emission efficiency enhancement with collinear pumping

Effective rejection of non-resonant photoluminescence

Potential for integrated silicon-based light sources

Abstract

Single-wall carbon nanotube are considered a fascinating nanomaterial for photonic applications and are especially promising for efficient light emitter in the telecommunication wavelength range. Furthermore, their hybrid integration with silicon photonic structures makes them an ideal platform to explore the carbon nanotube instrinsic properties. Here we report on the strong photoluminescence enhancement from carbon nanotubes integrated in silicon ring resonator circuit under two pumping configurations: surface-illuminated pumping at 735 nm and collinear pumping at 1.26 {\mu}m. Extremely efficient rejection of the non-resonant photoluminescence was obtained. In the collinear approach, an emission efficiency enhancement by a factor of 26 has been demonstrated in comparison with classical pumping scheme. This demonstration pave the way for the development of integrated light source in silicon based on carbon nanotubes.