Laser transitions under resonant optical pumping of donor centres in Si:P
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- Zhukavin, R., Gaponova, D., Muravjov, A. et al. Appl Phys B (2003) 76: 613. doi:10.1007/s00340-003-1167-x
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Terahertz stimulated emission of phosphorus donors in silicon optically excited by radiation from the free-electron laser FELIX has been studied. It is found that a spectral line of the Si:P laser emission depends on pump frequency. Stimulated emission arises on the 2p0→1s(E) intra-centre transition (21.2 meV) under resonant pumping of the 2p0 state and on the 2p0→1s(T2) transition (22.3 meV) under pumping of the 2p± or higher odd-parity donor states. The line shift is attributed to the Auger redistribution of the 1s(E)- and 1s(T2)-state populations.