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Optical properties of InGaAs/GaAs quantum wells with different distance from Si-delta-doping layer

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Author(s): Marcin MOTYKA | Grzegorz SEK | Janusz ANDRZEJEWSKI | Robert KUDRAWIEC | Jan MISIEWICZ | Beata SCIANA | Damian RADZIEWICZ | Marek TLACZALA

Journal: Optica Applicata
ISSN 0078-5466

Volume: 35;
Issue: 3;
Start page: 471;
Date: 2005;
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Keywords: quantum well | contactless electroreflectance | built-in electric field | delta-doping

ABSTRACT
In0.22Ga0.78As/GaAs single quantum wells with different distance from a delta doped layer have been investigated by using contactless electroreflectance (CER) spectroscopy. The oscillator strength of optical transitions and the value of the built-in electric field have been determined from CER spectra. Obtained results have been compared with theoretical calculations preformed in the framework of the effective mass approximation. In order to accurately find the wavefunctions of electrons and holes confined in the quantum well embedded in the built-in electric field, the time-dependent Schrödinger equation has been solved.

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