Fig. 2: Single- and double-resonance spin-echo experiments in the dark. | npj Quantum Information

Fig. 2: Single- and double-resonance spin-echo experiments in the dark.

From: Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping

Fig. 2

Contour plots of the two-dimensional spin-echo experiments with (a) and without the S-spin flip (P3) pulse (b) measured in the dark, with \(\tau _{{{\mathrm{L}}}} =\) 20 min at 10 K. F1 and F2 are the frequencies corresponding to the Fourier transform of the t1 and t2 time domains in the SEDOR pulse sequence shown in Fig. 5, respectively. The one-dimensional spectra shown near the F1 and F2 axes are the cross-sections along the F1 and F2 directions that pass the peak intensity, respectively. The spectra projected onto the F2 axis are similar in the two cases, while those projected onto the F1 axis are different from each other due to the effect of the additional P3 pulse. This difference is due to the heteronuclear spin–spin coupling.

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