Fig. 4: CPT measurement on a charge stabilised SnV− centre.
From: Coherence of a charge stabilised tin-vacancy spin in diamond
a CPT measurement on Emitter 2 with 300 nW of total laser power. This measurement is used to relate measured count rate to excited spin state populations of the SnV− centre. The mismatch of the simulation and the data on the high frequency side of the measurement is caused by approaching the edge of the amplification range of the microwave amplifier used, thereby effectively decreasing the sideband laser power. b Measurement of the CPT dip width with lowest possible total laser power, while preserving a reasonable signal to noise ratio. The data is fitted with a ground state decoherence rate of 64(10) kHz relating to a spin dephasing time of \({{{{\rm{T}}}}}_{2}^{* }=5(1)\,\mu {{{\rm{s}}}}\).
