Accession Number : ADP008264

Title :   Room-Temperature Persistent Spectral Hole Burning in Sm2+:SrFC10.5Br0.5,

Corporate Author : GENEVA UNIV (SWITZERLAND)

Personal Author(s) : Jaaniso, R. ; Bill, H.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : We report the first observation of spectral hole burning in the spectra of impurity centers at room temperature. The persistent holes are burned in the 5D sub 1 -7F sub 0 (632 mn) and 5D sub 0 -7F sub 0 (690 nm) transitions Of SM(2+) ions in the title compound. The search for the media showing persistent hole burning at liquid nitrogen or at room temperatures is strongly motivated by the potential applications of this phenomenon in the frequency-selective optical data storage and processing, as has been demonstrated in a number of low-temperature experiments. The extension of the temperature range of the hole burning method could also be of interest for scientific applications, especially in probing of disordered materials. In our study, single crystal species with 1 at.% samarium, and having dimensions of 0.2x5x5 mm, were used. From the structural point of view, they can be described as derivatives of PbFX type layer crystals with substitutionally disordered double layers of larger X (CI,Br) halogens and with the Sm (2+) impurities in the cationic sites.

Descriptors :   *IONS, *SAMARIUM, *MOLECULAR SPECTROSCOPY, CRYSTALS, FREQUENCY, HALOGENS, IMPURITIES, LIQUID NITROGEN, LOW TEMPERATURE, MEDIA, NITROGEN, OPTICAL DATA, PROCESSING, ROOM TEMPERATURE, SINGLE CRYSTALS, SPECTRA, STORAGE, TEMPERATURE, TRANSITIONS, ABSORPTION SPECTRA, OPTICAL STORAGE, DATA STORAGE SYSTEMS.

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE