Contactless electroreflectance spectroscopy of optical transitions in low dimensional semiconductor structures

• Autorzy: Misiewicz J. , Kudrawiec R.
• Języki publikacji: EN

Abstrakty

EN

The authors present the application of contactless electroreflectance (CER) spectroscopy to study optical transitions in low dimensional semiconductor structures including quantum wells (QWs), step-like QWs, quantum dots (QDs), quantum dashes (QDashes), QDs and QDashes embedded in a QW, and QDashes coupled with a QW. For QWs optical transitions between the ground and excited states as well as optical transitions in QW barriers and step-like barriers have been clearly observed in CER spectra. Energies of these transitions have been compared with theoretical calculations and in this way the band structure has been determined for the investigated QWs. For QD and QDash structures optical transitions in QDs and QDashes as well as optical transitions in the wetting layer have been identified. For QDs and QDashes surrounded by a QW, in addition to energies of QD and QDash transitions, energies of optical transitions in the surrounded QW have been measured and the band structure has been determined for the surrounded QW. Finally some differences, which can be observed in CER and photoreflectance spectra, have been presented and discussed for selected QW and QD structures.

Słowa kluczowe

EN

contactless electroreflectance; quantum wells; quantum dots; optical transitions

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2012
• Tom: Vol. 20, No. 2
• Strony: 101--119
• Opis fizyczny: Bibliogr. 72 poz., il., wykr.

Twórcy

autor

Misiewicz J.

• Institute of Physics, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego, 50-370 Wrocław, Poland

autor

Kudrawiec R.

• Institute of Physics, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego, 50-370 Wrocław, Poland

Bibliografia

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