Abstract
Summary form only given. A direct time-resolved measurement of nonradiative transition rates and decay times among the **4T//2 pump band, and the **2E metastable storage level of Cr**3** plus ions in emerald was performed using the picosecond excite-and-probe absorption technique. The experimental arrangement uses a frequency-doubled 5-ps 527-nm pulse derived from a Nd:glass laser to excite the higher-lying vibrational levels of the **4T//2 band. These excited vibrational levels relax predominantly via nonradiative transitions resulting in a growth of population in the zero and lower-lying vibrational levels of the **4T//2 state, and in the metastable **2E level. This growth of population is monitored by an infrared picosecond probe pulse which may be wavelength tuned from 2 to 5 mu m. The kinetics of excited-state transitions is studied by measuring the change in the optical absorption of the probe pulse as a function of the pump-probe delay time.
Original language | English (US) |
---|---|
Title of host publication | Unknown Host Publication Title |
Place of Publication | Washington, DC, USA |
Publisher | Optical Soc of America (Technical Digest Series v 20) |
Pages | 162-165 |
Number of pages | 4 |
ISBN (Print) | 0936659483 |
State | Published - 1987 |
Externally published | Yes |
ASJC Scopus subject areas
- Engineering(all)