Covalent effects and optical spectra of transition metal impurities in semiconductors

V. Fleurov*, P. Dahan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

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 languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages296-304
Number of pages9
Volume2706
DOIs
StatePublished - 1996
Event10th Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions - St. Petersburg, Russia
Duration: 3 Jul 19957 Jul 1995

Conference

Conference10th Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transitional-Metal Ions
CitySt. Petersburg, Russia
Period3/07/957/07/95

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