Fig. 1: Single erbium dopants coupled to a nanophotonic resonator. | Nature Communications

Fig. 1: Single erbium dopants coupled to a nanophotonic resonator.

From: Optical single-shot readout of spin qubits in silicon

Fig. 1

a Several emitters (black and red spin symbols) are embedded at random positions within a nanophotonic resonator (SEM image, scale bar 3 μm). Photons (red curly arrows) are coupled in and out via a tapered feed waveguide that is brought in contact with a tapered glass fiber (not shown). b When the cavity frequency is tuned on resonance with erbium ensembles in site A34 and the excitation laser frequency is varied, the fluorescence in the first 20 μs after 0.15 μs-long laser excitation pulses exhibits several sharp peaks within the cavity linewidth of 2.37(6) GHz FWHM (x-axis range). Each peak corresponds to a single erbium dopant, and several of them are well-separated from the others so that these dopants can be addressed individually. Error bars: 1 SD.

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