With the “Cluster Lab II” apparatus it is possible to dope high melting metal atoms and clusters to helium nanodroplets (HeN). Currently we dope the droplets with chromium (Cr) atoms (see our publications) in a crossed beam orientation shown in the figure below.
This figure shows the principle of optically detected magnetic resonance (ODMR) exploiting magnetic circular dichroism (MCD).
Fig. 2: Rabi scheme molecular (atomic) beam magnetic resonance (upper image). Optically detected magnetic resonance (ODMR, lower image).
Fig. 3: Laser induced fluoresence spectra of single K and Rb atoms on helium droplets. The free atomic transitions are indicated as vertical bars.
Fig. 4: Energy level diagram of alkali-metal atoms. Although the Zeeman is not resolved on helium droplets (typically 1/3 cm-1 Zeeman splitting compared to ~50 cm-1 line broadening) the spin states can be addressed selectively using a magnetic circular dichroism (MCD) scheme.