Optical Raman heterodyne detection of (27)Al superhyperfine spectra in ruby.
We report extension of the Raman heterodyne technique for detection of nuclear magnetic resonance (NMR) to superhyperfine spectra. NMR of the four nearest neighbor sets of (27)A1 (I = 5/2) surrounding Cr(3+) in ruby has been observed with high sensitivity using optical excitation of the R(1) line at 693.4 nm. Either excited-state or groundstate resonances could be selectively displayed by setting the sample temperature to 2 or 7.5 K, respectively. All 40 expected NMR resonances were observed, with good agreement obtained between calculated and experimental values.
Szabo
A
A
Muramoto
T
T
Kaarli
R
R