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Optical anisotropy ...
Optical anisotropy of (001)-GaAs surface quantum wells
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- Lastras-Martínez, L. F. (författare)
- Max-Planck-Institut Festkorperforschung, Stuttgart, Germany; Instituto de Investigación en Comunicación Optica, Universidad Autonóma de San Luis Potosí, San Luis Potosí, Mexico
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- Rönnow, Daniel (författare)
- Max-Planck-Institut Festkorperforschung, Stuttgart, Germany
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- Santos, P. V. (författare)
- Max-Planck-Institut Festkorperforschung, Stuttgart, Germany; Paul-Drude-Institut für Festkörperelektronik, Berlin, Germany
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- Cardona, M. (författare)
- Max-Planck-Institut Festkorperforschung, Stuttgart, Germany
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- Eberl, K. (författare)
- Max-Planck-Institut Festkorperforschung, Stuttgart, Germany
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 64:24, s. 2453031-2453038
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report a reflectance difference spectroscopy (RDS) study of the optical anisotropy of GaAs:(001) surface quantum wells consisting of a thin GaAs layer (3-30 nm thick) embedded between an arsenic reconstructed surface and an AlAs barrier. The RDS spectra display anisotropic contributions from the free surface and from the GaAs/AlAs interface. By comparing RDS spectra for the c(4×4) and (2×4) surface reconstructions, we separate these two contributions, and demonstrate that the anisotropy around the E1 and E1+Δ1 transitions comprises a component originating from modifications of bulk states near the surface. The latter is attributed to anisotropic strains induced by the surface reconstruction. The experimental data are well described by a model for the RDS response of the multilayer structures, which also takes into account the blue energy shifts and the changes in oscillator strength of the E1 and E1+Δ1 transitions induced by quantum-well confinement.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- arsenic; gallium arsenide
- anisotropy; article; energy; optics; oscillator; quantum mechanics; reflectometry; surface property
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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