May 16, 2025
We’re thrilled to share our latest publication in ACS Nano:
“Solution-Processed Ultrafast, Room-Temperature Single-Photon Source at 1550 nm” 📝✨
Our study tackles the long-standing challenge of creating a bright, ultrafast single-photon source in the telecom C-band that operates at room temperature. By embedding colloidal PbS/CdS quantum dots in a simple nanoparticle-on-mirror cavity, we achieved:
•Ultrafast lifetimes (65 ps) via extreme Purcell enhancement (up to 10,700×) 🚀
•12 million single photons/sec at 1550 nm 📶
•Stable, non-blinking emission at room temperature 👍
Why it matters:
• Brightest room-temperature telecom C-band source to date, addressing low yield and blinking drawbacks of colloidal QDs.
• Future improvements—spectral filtering, time gating, and advanced colloidal syntheses—could push purity and linewidth to the lifetime limit.
• Our solution-processable, lithography-free platform paves the way for scalable, on-chip quantum photonic devices and integration into next-gen quantum communication systems.
Check out the full paper here🔗.
A huge thank you to Siyuan Zhang, Andrew Traverso, Ekaterina Dolgopolova, Ajay Singh, Ph.D., Hiroyuki Kishida, Max Livshits, Chris Sheehan , Eric Bowes, Can Li, Jennifer Hollingsworth, and Maiken H. Mikkelsen—for making this possible! 👏