An elegant method for the detection of single spins using photovoltage

A new method for detecting spin states in diamond defects has been developed by researchers at HZB. Instead of using complex optical detection, the team measures photovoltage using Kelvin probe force microscopy. This technique allows for reading individual spin states and capturing spin dynamics. The breakthrough could lead to more compact quantum sensors and diamond-based devices, potentially impacting fields like quantum computing and sensing. The method may also be applicable to other solid-state systems with spin defects.