Optical hyperpolarization and inductive readout of $^{31}P$ donor nuclei in natural abundance single crystal $^{29}Si$

We optically polarize and inductively detect $^{31}P$ donor nuclei in single crystal silicon at high magnetic fields ($6.7T$). Samples include both natural abundance $^{29}Si$ and an isotopically purified $^{28}Si$ sample. We observe dipolar order in the $^{29}Si$ nuclear spins through a spin-locking measurement. This provides a means of characterizing spin transport in the vicinity of the $^{31}P$ donors.