ISSN:
1349-9432
Keywords:
sodium chloride
;
sulfur
;
photoluminescence
;
decay time
;
nonradiative transition
;
laser active
;
center
;
solid-state laser
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract An investigation was carried out on decay time of the 2.09 eV emission of S2–vacancy pair centers in NaCl crystals. When the crystal was excited by a pulsed 337 nm light from an N2 laser, the 2.09 eV yellow luminescence principally decayed with the lifetime of 14.2 μs at low temperatures, and exhibited a weak thermal quenching with an activation energy of 51.3 meV above about 150 K. Such S2--vacancy pair centers responsible for the 2.09 eV luminescence were thermally stable at room temperature, and not bleached even when exposed to ultraviolet lights below about 5 eV. Thus, the 2.09 eV emission center possibly can be used as a solid-state laser active center working at room temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10043-999-0082-8
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