Title:

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

Group publication title:

Optica Applicata

Creator:

Syperek, Marcin ; Kudrawiec, Robert ; Misiewicz, Jan ; Korbutowicz, Ryszard ; Paszkiewicz, Regina ; Tłaczała, Marek

Contributor:

Gaj, Miron. Redakcja ; Wilk, Ireneusz. Redakcja

Subject and Keywords:

optyka ; GaN ; photoreflectance ; photoluminescence ; electric field

Description:

Optica Applicata, Vol. 35, 2005, nr 3, s. 529-535

Abstrakt:

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.

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Wrocław

Date:

2005

Resource Type:

artykuł

Source:

<sygn. PWr A3481II> ; click here to follow the link ; click here to follow the link

Language:

eng

Relation:

Optica Applicata ; Optica Applicata, Vol. 35, 2005 ; Optica Applicata, Vol. 35, 2005, nr 3 ; Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki

Rights:

Wszystkie prawa zastrzeżone (Copyright)

Access Rights:

Dla wszystkich w zakresie dozwolonego użytku

Location:

Politechnika Wrocławska