Dressed-state resonant coupling between bright and dark spins in diamond

C. Belthangady*, N. Bar-Gill, L. M. Pham, K. Arai, D. Le Sage, P. Cappellaro, R. L. Walsworth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


Under ambient conditions, spin impurities in solid-state systems are found in thermally mixed states and are optically "dark"; i.e., the spin states cannot be optically controlled. Nitrogen-vacancy (NV) centers in diamond are an exception in that the electronic spin states are "bright"; i.e., they can be polarized by optical pumping, coherently manipulated with spin-resonance techniques, and read out optically, all at room temperature. Here we demonstrate a scheme to resonantly couple bright NV electronic spins to dark substitutional-nitrogen (P1) electronic spins by dressing their spin states with oscillating magnetic fields. This resonant coupling mechanism can be used to transfer spin polarization from NV spins to nearby dark spins and could be used to cool a mesoscopic bath of dark spins to near-zero temperature, thus providing a resource for quantum information and sensing, and aiding studies of quantum effects in many-body spin systems.

Original languageAmerican English
Article number157601
JournalPhysical Review Letters
Issue number15
StatePublished - 12 Apr 2013
Externally publishedYes


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