Epitaxial CaWO4 thin films with 183W reduced to 1.2% abundance were grown, showing 214 MHz PL linewidth and single Er3+ ion emission in nanophotonic devices.
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Isotopically enriched epitaxial CaWO$_{4}$ thin films for Er$^{3+}$ spin-photon quantum interfaces
Epitaxial CaWO4 thin films with 183W reduced to 1.2% abundance were grown, showing 214 MHz PL linewidth and single Er3+ ion emission in nanophotonic devices.