Photoreflectance spectroscopy of thick GaN layers grown by hydride vapour phase epitaxy technique

• Autorzy: Syperek M. , Kudrawiec R. , Misiewicz J. , Korbutowicz R. , Paszkiewicz R. , Tłaczała M.
• Konferencja: Surface Physics and Thin-Films Structure Seminar ; 17-21.05.2005 ; Szklarska Poręba, Poland
• Języki publikacji: PL

Abstrakty

EN

The room temperature photoreflectance (PR) spectroscopy was used to investigate thick GaN epitaxial layers. The GaN layers were grown by hydride vapour phase epitaxy (HVPE) technique and compared to thin GaN layer grown by metalorganic vapour phase epitaxy (MOVPE) technique on AlN buffer layer. We observed energy red shift of the PR resonance for HVPE GaN layers compared with MOVPE GaN layer. This blue shift is due to reduction of the strain in HVPE layer. In addition, weak PR features related to Franz-Keldysh oscillations (FKO) have been observed. The electric field determined from the FKO period is 28 and 71 kV/cm for MOVPE and HVPE layers, respectively.

Słowa kluczowe

EN

GaN; photoreflectance; photoluminescence; electric field

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2005
• Tom: Vol. 35, nr 3
• Strony: 529--535
• Opis fizyczny: Billiogr. 30 poz., wykr.

Twórcy

autor

Syperek M.

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

autor

Kudrawiec R.

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

autor

Misiewicz J.

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

autor

Korbutowicz R.

• The Faculty of Microsystem, Electronics and Photonics, Wrocław University of Technology, Janiszewskiego 11/17, 50-372 Wrocław, Poland

autor

Paszkiewicz R.

• The Faculty of Microsystem, Electronics and Photonics, Wrocław University of Technology, Janiszewskiego 11/17, 50-372 Wrocław, Poland

autor

Tłaczała M.

• The Faculty of Microsystem, Electronics and Photonics, Wrocław University of Technology, Janiszewskiego 11/17, 50-372 Wrocław, Poland

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