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Titolo:
Characterization of surface nanostructures by STM light emission: individual GaAs/AlGaAs quantum wells
Autore:
Ushioda, S; Tsuruoka, T; Ohizumi, Y;
Indirizzi:
Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 un, Sendai, Miyagi 9808577, Japan Japan Sci & Technol Corp, CREST, Sendai, Miyagi 9808577, Japan Japan Sci &Technol Corp Sendai Miyagi Japan 9808577 iyagi 9808577, Japan
Titolo Testata:
APPLIED SURFACE SCIENCE
fascicolo: 1-4, volume: 166, anno: 2000,
pagine: 284 - 289
SICI:
0169-4332(20001009)166:1-4<284:COSNBS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING TUNNELING MICROSCOPE; PHOTON-EMISSION; LUMINESCENCE; SPECTRA; GAAS; SI;
Keywords:
STM light emission; quantum wells; GaAlAs;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Ushioda, S Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 Miyagi 9808577, Japan
Citazione:
S. Ushioda et al., "Characterization of surface nanostructures by STM light emission: individual GaAs/AlGaAs quantum wells", APPL SURF S, 166(1-4), 2000, pp. 284-289

Abstract

By spectroscopically analyzing the light emitted by specific nanostructures under the scanning tunneling microscope tip (scanning tunneling microscopy light emission spectroscopy: STM-LES), we have investigated the electronic and optical properties of individual quantum wells (QWs) of p-type AlGaAs/GaAs layered structures. Atomic resolution was obtained on the cleaved (110) surface that shows the cross-sections of QWs, and the emission spectra from individual wells were measured by injecting electrons from the STM tip into them. Each individual well emits a spectrum that is consistent with the electronic transitions for the appropriate well width and also with the photoluminescence (PL) spectra. Furthermore, the diffusion length of minority carriers were estimated in real space by injecting electrons at differentdistances from a given well, and by observing the change in the emission intensity. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 03/07/20 alle ore 01:15:56