1C6 - Cyclotron resonance in semiconductors with far infrared laser

The quantum effects in the degenerate valence bands of germanium have been observed as multiple cyclotron resonance absorption lines at a temperature of 165°K. Additional lines were resolved at 40°K. The combination of high intensity magnetic fields up to 180 000 gauss and the output power of a cyanide submillimeter laser (0.337 millimeters) was used. The construction and operation of a simple resonance spectrometer is described. Cryogenic techniques and the choice of detectors are discussed. The possible use of molecular gas laser spectrometers for EPR, ferrimagnetic resonance, and antiferromagnetic resonance at submillimeter wavelengths is considered.