Abstract
Time-resolved "two color" photoluminescence is reported from the 944 meV band produced by a low concentration of copper in silicon. Photoluminescence has been generated by a pulsed pump beam, and then partially quenched by a probe beam from a free-electron laser. The kinetics of the quenching allow the absorption cross section for photoionization of the center to be determined without knowing its concentration in the sample. The time-resolved data demonstrate a partial recovery of the luminescence after photoionization, due to repopulation of the ionized traps.
| Original language | English |
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| Article number | 085206 |
| Journal | Physical Review B (Condensed Matter and Materials Physics) |
| Volume | 71 |
| Issue number | 8 |
| Publication status | Published - Feb 2005 |