The Delft University team’s chiplet achieves over 5.4% excitation-to-emission conversion, crosstalk below -40 dB, and 160 nm bandwidth in a compact footprint under 2000 μm².
This surpasses previous designs, enabling efficient quantum state readout and supporting modular integration with silicon nitride photonic circuits, a critical step for scalable quantum processors.
The modular approach addresses diamond fabrication challenges and interface losses, but further research is needed to optimise coupling techniques and receptor materials for large-scale quantum networks.
How does this chiplet breakthrough accelerate the timeline for a secure, functional quantum internet?
Will this design make silicon nitride the undisputed platform for building commercial quantum computers?
Is a 5.4% efficiency boost enough to survive signal loss across a large network of these chiplets?
Can 'pick and place' assembly scale for mass-producing quantum chips without introducing fatal flaws?
With Europe and DARPA racing, who will first build a computer using these modular quantum chiplets?
Does linking separate diamond and silicon parts create new weak points that threaten the entire system?