Evidence of "crossed" transitions in dots-in-a-well structures through waveguide absorption measurements
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Date
2008
Authors
Visimberga, Giuseppe
Raino, G.
Salhi, A.
Tasco, V.
Todaro, M. T.
Martiradonna, L.
De Giorgi, M.
Passaseo, A.
Cingolani, R.
De Vittorio, M.
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
Published Version
Abstract
In-plane absorption measurements were performed at room temperature by means of a waveguide transmission setup on a Stranski-Krastanov InAs dots-in-a-well system emitting at 1.3 mu m embedded in a p-i-n structure. The polarization dependence of quantum dot (QD) absorption was exploited to resolve its discrete and continuous spectral components and study them separately under reverse bias application. The quantum confined Stark effect observed in the discrete spectral component gave evidence of an upward built-in QD dipole of about 9.5x10(-29) C m. The continuous component was found to originate from electronic transitions involving a QD state and a quantum well state. (C) 2008 American Institute of Physics. (DOI: 10.1063/1.3000381)
Description
Keywords
Assembled quantum dots , Photocurrent spectroscopy , Lasers , Quantum dots , Absorption spectra , Quantum wells , Transmission measurement , Polarization
Citation
Visimberga, G., Rainò, G., Salhi, A., Tasco, V., Todaro, M. T., Martiradonna, L., Giorgi, M. D., Passaseo, A., Cingolani, R. and Vittorio, M. D. (2008) 'Evidence of “crossed” transitions in dots-in-a-well structures through waveguide absorption measurements', Applied Physics Letters, 93(15), pp. 151112. doi: 10.1063/1.3000381
Copyright
© 2008 American Institute of Physics.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Visimberga, G., Rainò, G., Salhi, A., Tasco, V., Todaro, M. T., Martiradonna, L., Giorgi, M. D., Passaseo, A., Cingolani, R. and Vittorio, M. D. (2008) 'Evidence of “crossed” transitions in dots-in-a-well structures through waveguide absorption measurements', Applied Physics Letters, 93(15), pp. 151112 and may be found at http://aip.scitation.org/doi/abs/10.1063/1.3000381