Johann Heber

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
Interference coatings for the vacuum ultraviolet spectral range (VUV) between 200 nm and 50 nm find several classical and innovative application fields in astronomy, semiconductor industry, synchrotron radiation optics, materials processing and medicine. Components comprise for example antireflective coatings, enhanced aluminum mirrors and broad band(More)
Site-selective #uorescence and laser excitation spectroscopy for di!erent types of optical centers in SrF 2 : Nd3` (0.3 } 1.0%) and SrF 2 : La3` (1.0%) : Nd3` (0.2%) were performed at 4.2 K. The crystal-"eld levels of the 4I 9@2 , 4F 3@2 , and 4G 5@2 multiplets for di!erent Nd3` optical centers were determined in SrF 2 : Nd3` (0.3%). An attempt was made to(More)
Intermultiplet transitions involving emission (or absorption) of one photon and n phonons are theoretically investigated in trivalent rare earth (RE) ions in crystals. Transitions are induced by joint action of electromagnetic "eld and high-order optical anharmonicity (M-process). Hence, this work extends Judd's study of one photon}one phonon transitions to(More)
  • 1