Hole burning spectroscopy of porous silicon

Autor:	F. Koch, B. Averboukh, M. Ben-Chorin, M. Schwartzkopff, H. Heckler, Dimitri Dr. Kovalev
Rok vydání:	1998
Předmět:	Photoluminescence Materials science Condensed Matter::Other Astrophysics::High Energy Astrophysical Phenomena Physics::Optics Porous silicon Molecular physics Thermoluminescence Auger Condensed Matter::Materials Science Light emission Spontaneous emission Luminescence Spectroscopy
Zdroj:	Physical Review B. 57:3741-3744
ISSN:	1095-3795 0163-1829
Popis:	We report on luminescence hole burning experiments that provide a clue for the mechanism of photoluminescence of porous silicon. A large fraction of the light emission is suppressed by an intense resonant pump beam, which introduces an Auger nonradiative recombination. The hole burnt in the luminescence spectrum has two well-defined onsets related to the TO momentum conserving phonons of Si. At low temperatures the hole persists for hours. An increase of the temperature heals the spectral hole, and this is accompanied by a thermoluminescence signal. These results allow us to conclude that most of the luminescence of porous Si arises from radiative recombination between states confined inside the nanocrystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::acb3ff58e7ff87d88213c65d06b27fff https://doi.org/10.1103/physrevb.57.3741 Zobrazit plný text záznamu