Sommaire:

The readout of negatively charged nitrogen-vacancy (NV) centre electron spins is essential for applications in quantum computation, metrology and sensing. Conventional readout protocols are based on the detection of photons emitted from NV centres, a process limited by the efficiency of photon collection. Recently, we have introduced the photoelectrically detected magnetic resonance (PDMR) technique [1] that overcomes some of the drawbacks of optical methods [2]. We demonstrate pulsed photoelectric coherent manipulation and detection of NV centers [3] as a critical step towards using our technique for room temperature quantum computation devices. We develop novel pulse coherent operation schemes, specific for photocurrent, using high frequency laser and MW pulses encoded in low frequency envelope. Allowing thus to eliminate the photocurrent due to ionization of residual defects and downscale the detection from previous ~ 106 NVs to just 5 NVs centres. The pulsed envelope PDMR technique is demonstrated on Rabi and Ramsey sequences that are eminent tools for magnetometry and quantum protocols.

[1] E. Bourgeois, M. Gulka et al., Nature Comm. (2015)
[2] E. Bourgeois, M. Gulka et al., Phys. Rev. B (2017)
[3] M. Gulka et al., Phys. Rev. Applied (2017)

Pour plus d'informations, merci de contacter Gergely C.