Experimental demonstration of two-photon magnetic resonances in a single-spin system of a solid

While the manipulation of quantum systems has been significantly developed, achieving a single-source multiuse system for quantum-information processing and networks is still challenging. A virtual state, a so-called dressed state, is a potential host for quantum hybridizations of quantum physical systems with various operational ranges. We present an experimental demonstration of a dressed state generated by two-photon magnetic resonances using a single spin in a single nitrogen-vacancy center in diamond. The two-photon magnetic resonances occur under the application of microwave and radio-frequency fields, with different operational ranges. The experimental results reveal the behavior of two-photon magnetic transitions in a single defect spin in a solid, thus presenting potential quantum and semiclassical hybrid systems with different operational ranges using superconductivity and spintronics devices.