Abstract
Covalent interaction of the electrons from the unfilled d-shell of transition metal impurities in semiconductors with ligands results in swelling the d-electron wave functions. Several obvious results of this are a drastic increase of the absorption cross-section (antenna effect), lifting of bans for some dipole transitions due to mixing of the states with different parities. A less obvious consequence is a possibility of lines complementing the intracenter transitions to the forbidden energy gap. They appear due to multielectron structure of the d-shells and become observable in the luminescence due to an interference of the covalent effects and the electron phonon interaction. The same effects lead to a long living metastable electronically excited 2E configuration of the d atom. As a result observation of the complementing lines in the absorption also becomes possible.
Original language | English |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Pages | 296-304 |
Number of pages | 9 |
Volume | 2706 |
DOIs | |
State | Published - 1996 |
Event | 10th Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions - St. Petersburg, Russia Duration: 3 Jul 1995 → 7 Jul 1995 |
Conference
Conference | 10th Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions |
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City | St. Petersburg, Russia |
Period | 3/07/95 → 7/07/95 |