OPNMR pump laser
Optically-pumped NMR (OPNMR) combines laser excitation with NMR detection. Electrons are excited into the conduction band and spin polarized by the incident photons. Nuclear spins in the lattice become oriented by the photoexcited electrons through the hyperfine interaction. This nuclear orientation is subsequently detected by NMR (radio-frequency detection).
We are applying optical pumping techniques to systems of semiconductors to better understand their optoelectronic properties. Furthermore, we are developing on methods to examine low-dimensional III-V and II-VI semiconductors with OPNMR.
A schematic of the experimental setup and optical pumping mechanism are shown below:
OPNMR experimental setup
Schematic of the optical pumping mechanism