A combined investigation of lateral and vertical Stark effect in InAs self-assembled quantum dots in waveguide structures

An investigation of the transmission spectra as a function of electric field and light polarization in self-assembled InAs quantum dots has been performed. To have access to both vertical and lateral fields with respect to the growth direction, and to allow for polarization-dependent measurements, t...

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Published inPhysica. E, Low-dimensional systems & nanostructures Vol. 13; no. 2; pp. 283 - 288
Main Authors Wolst, O, Schardt, M, Kahl, M, Malzer, S, Döhler, G.H
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2002
Subjects
Self-assembled quantum dots
Stark effect
Waveguide absorption
73.61.Ey
78.66.Fd
Self-assembled quantum dots
Stark effect
Waveguide absorption
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Summary:An investigation of the transmission spectra as a function of electric field and light polarization in self-assembled InAs quantum dots has been performed. To have access to both vertical and lateral fields with respect to the growth direction, and to allow for polarization-dependent measurements, the samples were fabricated as waveguide structures. In the case of the vertical field, a quadratic Stark effect is observed not only in the TE-mode, but also in the TM-mode indicating the participation of light holes. In the lateral field, no Stark shift is observed, but there is a strong change in oscillator strength.
ISSN:1386-9477
1873-1759
DOI:10.1016/S1386-9477(01)00538-0