Bandgap Engineering and Optical Constants of Y
スポンサーリンク
概要
- 論文の詳細を見る
We study wurtzite Y<inf>x</inf>Al<inf>1-x</inf>N (0\leq x \leq 0.22) films with (0001) orientation deposited by magnetron sputtering epitaxy on Si(100) substrates and we determine the alloys band gap energies and optical constants. Room temperature spectroscopic ellipsometry (SE) is employed in the energy range from 1 to 6.3 eV, and data modeling based on the standard dielectric function model is used. As a result of the SE data analysis the Y<inf>x</inf>Al<inf>1-x</inf>N refractive index and extinction coefficient are determined. The band gap of Y<inf>x</inf>Al<inf>1-x</inf>N is found to decrease linearly from 6.2 eV (x = 0) down to 4.5 eV (x = 0.22). We further observe an increase of the refractive index with increasing Y content; from 1.93 to 2.20 (at 2 eV) for x = 0 and 0.22, respectively, reflecting the increase in material density.
- 2013-08-25
著者
-
Hultman Lars
Department Of Physics Chemistry And Biology (ifm) Linkoping University
-
Birch Jens
Department Of Physics Chemistry And Biology (ifm) Linkoping University
-
Hultman Lars
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Sedrine Nebiha
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Zukauskaite Agne
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Darakchieva Vanya
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Sedrine Nebiha
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Zukauskaite Agne
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
-
Darakchieva Vanya
Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden
関連論文
- Growth, Characterization and Device Fabrication of Boron Delta-Doped Structures by Si-Molecular Beam Epitaxy
- Spontaneous Formation of AlInN Core-Shell Nanorod Arrays by Ultrahigh-Vacuum Magnetron Sputter Epitaxy
- Bandgap Engineering and Optical Constants of Y