Self-trapped exciton state in Si nanocrystals revealed by induced absorption

De Boer, WDAM; Timmerman, D; Gregorkiewicz, T; Zhang, H; Buma, WJ; Poddubny, AN; Prokofiev, AA; Yassievich, IN

Self-trapped exciton state in Si nanocrystals revealed by induced absorption

De Boer, WDAM Timmerman, D Gregorkiewicz, T Zhang, H Buma, WJ Poddubny, AN Prokofiev, AA Yassievich, IN

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Publication Type:: Journal Article
Citation:: Physical Review B - Condensed Matter and Materials Physics, 2012, 85 (16)
Issue Date:: 2012-04-25

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Field	Value	Language
dc.contributor.author	De Boer, WDAM	en_US
dc.contributor.author	Timmerman, D	en_US
dc.contributor.author	Gregorkiewicz, T	en_US
dc.contributor.author	Zhang, H	en_US
dc.contributor.author	Buma, WJ	en_US
dc.contributor.author	Poddubny, AN	en_US
dc.contributor.author	Prokofiev, AA	en_US
dc.contributor.author	Yassievich, IN	en_US
dc.date.issued	2012-04-25	en_US
dc.identifier.citation	Physical Review B - Condensed Matter and Materials Physics, 2012, 85 (16)	en_US
dc.identifier.issn	1098-0121	en_US
dc.identifier.uri	http://hdl.handle.net/10453/34501
dc.description.abstract	We report results of time-resolved induced absorption (IA) spectroscopy on Si nanocrystals (Si NCs) embedded in a SiO 2 matrix. In line with theoretical modeling, the IA amplitude decreases with probing photon energy, however only until a certain threshold value. For larger photon energies, an increase of IA is observed. This unexpected behavior is interpreted in terms of the self-trapped exciton state whose formation in Si NCs was put forward some time ago based on theoretical considerations. Here, we present a direct experimental confirmation of this supposition. © 2012 American Physical Society.	en_US
dc.relation.ispartof	Physical Review B - Condensed Matter and Materials Physics	en_US
dc.relation.isbasedon	10.1103/PhysRevB.85.161409	en_US
dc.subject.classification	Fluids & Plasmas	en_US
dc.title	Self-trapped exciton state in Si nanocrystals revealed by induced absorption	en_US
dc.type	Journal Article
utslib.citation.volume	16	en_US
utslib.citation.volume	85	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	16	en_US
pubs.publication-status	Published	en_US
pubs.volume	85	en_US

Abstract:

We report results of time-resolved induced absorption (IA) spectroscopy on Si nanocrystals (Si NCs) embedded in a SiO 2 matrix. In line with theoretical modeling, the IA amplitude decreases with probing photon energy, however only until a certain threshold value. For larger photon energies, an increase of IA is observed. This unexpected behavior is interpreted in terms of the self-trapped exciton state whose formation in Si NCs was put forward some time ago based on theoretical considerations. Here, we present a direct experimental confirmation of this supposition. © 2012 American Physical Society.

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http://hdl.handle.net/10453/34501