Picosecond infrared laser stimulation of luminescence in CaS : Eu,Sm

<p> The response and decay time of the optically stimulated luminescence of electron trapping material CaS:Eu,Sm to ultrashort infrared pulse has been measured by projecting two 1.064 mu m laser pulses on the photocathode of a streak camera, one illuminates ETM screen on the photocathode, another illuminates the photocathode after a frequency doubling. The result indicates that the response and decay time is less than 14.3 ps. The decay law of the infrared upconversion luminescence followed by CaS:Eu, Sm is also presented. The work shows that this kind of electron trapping materials could be widely used in the rapid infrared upconversion and detection. (C) 1999 American Institute of Physics. [S0021-8979(99)02001- 0].