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Modulation of the electronic properties of GaN films by surface acoustic waves

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Modulation of the electronic properties of GaN films by surface acoustic waves

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dc.contributor.author	Camacho, J.
dc.contributor.author	Santos, P.V.
dc.contributor.author	Alsina, F.
dc.contributor.author	Ramsteiner, M.
dc.contributor.author	Ploog, K. H.
dc.contributor.author	Cantarero Sáez, Andrés
dc.contributor.author	Obloh, H.
dc.contributor.author	Wagner, J.
dc.date.accessioned	2010-06-02T10:49:37Z
dc.date.available	2010-06-02T10:49:37Z
dc.date.issued	2003
dc.identifier.citation	CAMACHO, J. ; SANTOS, P.V. ; ALSINA, F. ; RAMSTEINER, M. ; PLOOG, K.H. Modulation of the electronic properties of GaN films by surface acoustic waves. En: Journal of Applied Physics, 2003, vol. 94	en
dc.identifier.uri	http://hdl.handle.net/10550/12840
dc.description.abstract	We report on the interaction between photogenerated electron-hole pairs and surface acoustic waves (SAW) in GaN films grown on sapphire substrates. The spatial separation of photogenerated carriers by the piezoelectric field of the SAW is evidenced by the quenching of the photoluminescence (PL) intensity. The quenching levels in GaN are significantly smaller than those measured in GaAs under similar conditions. The latter is attributed to the lower exciton ionization efficiency and carrier separation probabilities mediated by the piezoelectric effect. The PL spectra also evidence energy shifts and broadenings of the electronic transitions, which are attributed to the band gap modulation by the SAW strain field.	en_US
dc.language.iso	en	en
dc.subject	Gallium compounds ; III-V semiconductors ; Wide band gap semiconductors ; Surface acoustic waves ; Semiconductor thin films ; Photoluminescence ; Radiation quenching ; Piezoelectric semiconductors ; Excitons ; Energy gap	en
dc.title	Modulation of the electronic properties of GaN films by surface acoustic waves	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::FÍSICA	en
dc.identifier.doi	10.1063/1.1582556	en
dc.identifier.idgrec	002106	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000094000003001892000001&idtype=cvips&prog=normal&doi=10.1063/1.1582556	en