Optically detected magnetic resonance of nitrogen vacancy centers in diamond offers a
route to both DC and AC magnetometry in diamond anvil cells under high pressures (> 3
GPa). However, a serious challenge to realizing experiments has been the insertion of
microwave radiation into the sample space without screening by the gasket material. We
utilize designer anvils with lithographically deposited metallic microchannels on the
diamond culet as a microwave antenna. We detected the spin resonance of an ensemble of …