liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Optical Spectroscopy of GaN/Al(Ga)N Quantum Dots Grown by Molecular Beam Epitaxy
Linköping University, Department of Physics, Chemistry and Biology.
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

GaN quantum dots grown by molecular beam epitaxy are examined by micro-photoluminescence. The exciton and biexciton emission are identified successfully by power-dependence measurement. With two different samples, it can be deduced that the linewidth of the peaks is narrower in the thicker deposited layer of GaN. The size of the GaN quantum dots is responsible for the binding energy of biexciton (EbXX); EbXX decreases with increasing size of GaN quantum dots. Under polarization studies, polar plot shows that emission is strongly linear polarized. In particular, the orientation of polarization vector is not related to any specific crystallography orientation. The polarization splitting of fine-structure is not able to resolve due to limited resolution of the system. The emission peaks can be detected up to 80 K. The curves of transition energy with respect to temperature are S-shaped. Strain effect and screening of electric field account for  blueshift of transition energy, whereas Varshni equation stands for redshifting. Both blueshifting and redshifting are compensated at temperature ranging from 4 K to 40 K.

Place, publisher, year, edition, pages
2009. , 46 p.
Keyword [en]
Quantum dots, GaN, AlN, Exciton, Biexciton, micro-Photoluminescence.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-19821ISRN: LITH-IFM-A-EX--09/2184--SEOAI: oai:DiVA.org:liu-19821DiVA: diva2:229047
Subject / course
Material Physics
Presentation
2009-05-27, Röntgen, F-huset, IFM Linköpings universitet,, SE 581 83 LINKÖPING, 10:00 (English)
Uppsok
Physics, Chemistry, Mathematics
Supervisors
Examiners
Available from: 2009-08-11 Created: 2009-08-11 Last updated: 2011-07-08Bibliographically approved

Open Access in DiVA

fulltext(4127 kB)370 downloads
File information
File name FULLTEXT01.pdfFile size 4127 kBChecksum SHA-512
c26a7b533dc10c7ce9e8bb0a92e23dc7b23717b2e840c335fe587da8675d93072853db56641f2516468607c53338691c268ceb377469fe4a8d88dc0f0cd6d0b2
Type fulltextMimetype application/pdf

By organisation
Department of Physics, Chemistry and Biology
Atom and Molecular Physics and Optics

Search outside of DiVA

GoogleGoogle Scholar
Total: 370 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 148 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf