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Magneto-optical properties of stacked self-assembled InAs quantum dots (2001)

Gonzalez, J. C. ; Plentz, F. ; Köche, N. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 89 (2001), S. 3760-3762

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: In this article, we report magneto-photoluminescence measurements on stacked self-assembled InAs quantum dots. By applying a magnetic field parallel to the growth direction, we determined the exciton reduced mass and exciton radius from the photoluminescence (PL) peak energy. We observed an asymmetric increase of the full width at half maximum of the quantum dots PL peak to the high-energy side that we associate to the size selectivity of the oscillator strength of the ground state transitions. The observed increase of the integrated intensity of the quantum dots line is explained in terms of the reabsorption of the photons emitted by the GaAs substrate and the InAs wetting layer. These effects are related to the multilayer structure of the sample. © 2001 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1353565

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Digitale Medien

Microvibration sample magnetometer: A force-type measurement (1985)

Morais, P. C. ; Köche, N. M. L. ; Tronconi, A. L. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 56 (1985), S. 411-414

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: A simple microvibrating sample magnetometer (MVSM), particularly inexpensive, sensitive, and versatile has been developed. An alternating magnetic field superposed to a steady uniform magnetic field is applied to the sample. The sample undergoes a periodic motion around an equilibrium position, causing a pressure fluctuation within a closed gas cell which is detected as an acoustic signal by a microphone.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1138313

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