Data are presented on the optical absorption and emission of F-aggregate centers in NaCl:OH-. In particular, we have studied the properties of the laser-active (F2+)H centers. The formation of the (F2+)H center is temperature dependent. One mechanism operates below and another above 50 K. The bleaching of the (F2+)H-center emission observed under intense Nd:YAG or He-Ne laser irradiation, due to reorientation of the emitting centers, is accompanied by a process at low temperatures that is predominant at temperatures below 20 K and involves the ionization of the X or F3 centers always present in the crystal. Thus the laser-active (F2+)H centers are destroyed by electron capture but are reformed by F-band light irradiation, which reverses the bleaching process. © 1991 The American Physical Society.

Baldacchini, G., Cremona, M., Casalboni, M., de Viry, D., Grassano, U.m., Luci, A., et al. (1991). Optical properties of (F2+)H and F-aggregate centers in NaCl:OH- crystals. PHYSICAL REVIEW. B, CONDENSED MATTER, 44(22), 12189-12196 [10.1103/PhysRevB.44.12189].

Optical properties of (F2+)H and F-aggregate centers in NaCl:OH- crystals

CASALBONI, MAURO;GRASSANO, UMBERTO MARIA;PALUMMO, MAURIZIA;
1991-01-01

Abstract

Data are presented on the optical absorption and emission of F-aggregate centers in NaCl:OH-. In particular, we have studied the properties of the laser-active (F2+)H centers. The formation of the (F2+)H center is temperature dependent. One mechanism operates below and another above 50 K. The bleaching of the (F2+)H-center emission observed under intense Nd:YAG or He-Ne laser irradiation, due to reorientation of the emitting centers, is accompanied by a process at low temperatures that is predominant at temperatures below 20 K and involves the ionization of the X or F3 centers always present in the crystal. Thus the laser-active (F2+)H centers are destroyed by electron capture but are reformed by F-band light irradiation, which reverses the bleaching process. © 1991 The American Physical Society.
1991
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - FISICA DELLA MATERIA
English
Condensed Matter Physics
Baldacchini, G., Cremona, M., Casalboni, M., de Viry, D., Grassano, U.m., Luci, A., et al. (1991). Optical properties of (F2+)H and F-aggregate centers in NaCl:OH- crystals. PHYSICAL REVIEW. B, CONDENSED MATTER, 44(22), 12189-12196 [10.1103/PhysRevB.44.12189].
Baldacchini, G; Cremona, M; Casalboni, M; de Viry, D; Grassano, Um; Luci, A; Palummo, M; Casalis, L; Minguzzi, P; Pozzi, F; Tonelli, M; Scacco, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/131206
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