Academic Journal
Interband optical transitions in the region of exciton resonances in In0.3Ga0.7As/GaAs quantum wells
| العنوان: | Interband optical transitions in the region of exciton resonances in In0.3Ga0.7As/GaAs quantum wells |
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| المؤلفون: | Sîrbu, Nicolae, Dorogan, Andrei, Dorogan, Valerian, Vieru, Tatiana, Ursachi, Veaceslav, Zalamai, Victor |
| المصدر: | Moldavian Journal of the Physical Sciences, Vol 11, Iss 4, Pp 319-332 (2012) |
| بيانات النشر: | D.Ghitu Institute of Electronic Engineering and Nanotechnologies, 2012. |
| سنة النشر: | 2012 |
| المجموعة: | LCC:Physics LCC:Electronics |
| مصطلحات موضوعية: | Physics, QC1-999, Electronics, TK7800-8360 |
| الوصف: | Reflectance spectra of quantum wells (QWs) with 8-nm-thick In0.3Ga0.7As layers with a 9-nm-thick GaAs barrier layer up and a 100-nm-thick barrier layer down were investigated in the spectral range of 0.5–1.6 eV in S- and P- polarizations at an incidence angle close to the normal (7о) as well as at a Brewster angle (76о). Narrow lines at 0.9021; 1.0161; 1.1302; 1.1973; and 1.2766 eV were observed in the reflectance and absorption spectra, which are due to hh,lh1-e1(1s), hh1,lh1-e2(1s), hh2,lh2 -e2(1s), and hh3,lh3,-e3(1s) transitions, as well as features due to quantum dotes (QDs) formed at the interface of nanolayers and the buffer. The contours of reflectance and absorption spectra are calculated with a single-oscillator, and many-oscillator models. The oscillator strength and the damping parameter are estimated for the optical transitions in QWs and QDs. The radiative life time of the exciton in a QW and a QD was found to be τо = (2Г0)-1 = 2x10-12 s. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2537-6365 1810-648X |
| Relation: | https://mjps.nanotech.md/archive/2012/article/22423; https://doaj.org/toc/1810-648X; https://doaj.org/toc/2537-6365 |
| URL الوصول: | https://doaj.org/article/b43bfd6c2c7b4773a9a6d795c3723080 |
| رقم الانضمام: | edsdoj.b43bfd6c2c7b4773a9a6d795c3723080 |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 25376365 1810648X |
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