Tiny Diamond Beams Linked to Titanium Dioxide Photonic Circuits

Researchers in the US and South Korea integrated diamond quantum emitters with titanium dioxide photonic circuits using a self-aligning fabrication method that keeps optical loss low. The chip demonstrated enhanced emission, on-chip spin control and photon routing.

• Self-aligned fabrication reduces light loss when joining diamond and TiO2 circuits
• Light source is a silicon-vacancy center in diamond, enhanced in a hybrid cavity
• On-chip spin control and photon routing shown on the same platform
• Approach could extend to other emitter and photonic material combinations