A differential photon-rate meter for real-time peak tracking in optically detected magnetic resonance at low photon-count rates
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-03-06 |
| Journal | PubMed Central |
| Authors | Kapildeb Ambal |
Abstract
Section titled āAbstractāWe describe a real-time method to obtain normalized differential count rate signals from modulated systems with photon detection at single-photon count rates. The method is demonstrated with a real-time peak-locking and frequency control to track magnetic field using optically detected magnetic resonance of nitrogen-vacancy centers in diamond. This procedure allows us to measure magnetic field continuously with sensitivity 4.1 Ī¼T/Hz(1/2) and to track magnetic field sweep rates up to 50 Ī¼T/s. The differential rate meter automates the processing of voltage pulse outputs from the photon detector, and provides noise levels on par with traditional photon counting methods using digital counters.