Optical Absorption Spectra and Polarizabilities of Silicon Carbide Nanotubes:  A First Principles Study

2007 ◽  
Vol 111 (51) ◽  
pp. 18864-18870 ◽  
Author(s):  
Lu Wang ◽  
Jing Lu ◽  
Guangfu Luo ◽  
Wei Song ◽  
Lin Lai ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
First Principles ◽  
Optical Absorption Spectra ◽  
First Principles Study ◽  
Silicon Carbide Nanotubes

scholarly journals First principles study of structures, static polarizabilities and optical absorption spectra of Cun-1Au (n=2–10) clusters

2013 ◽  
Vol 62 (5) ◽  
pp. 057803
Author(s):  
Qian Shuai ◽  
Guo Xin-Li ◽  
Wang Jia-Jia ◽  
Yu Xin-Quan ◽  
Wu San-Xie ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
First Principles ◽  
Optical Absorption Spectra ◽  
First Principles Study

Optical Absorption of Doped and Undoped Bulk SiC

2000 ◽  
Vol 640 ◽  
Author(s):  
K. Miller ◽  
Q. Zhou ◽  
J. Chen ◽  
M. O. Manasreh ◽  
Z. C. Feng ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Optical Absorption ◽  
Band Gap ◽  
Absorption Spectra ◽  
Spectral Region ◽  
Sharp Peak ◽  
Band Edge ◽  
Optical Absorption Spectra ◽  
Bulk Silicon ◽  
Free Carriers

ABSTRACTOptical absorption spectra of undoped, n-type, and semi-insulating 6H and 4H bulk silicon carbide (SiC) were obtained in the spectral region of 200 – 3200 nm (6.20 – 0.3875 eV). Several features were observed in the absorption spectra collected for various samples. A sharp peak below the band gap was observed in 4H SiC. The intensity of this peak was observed to increase in samples that exhibit larger absorption due to free carriers, which leads us to conclude that the defect responsible for this peak is also the source of the free carriers in the materials. Additionally, a series of optical absorption peaks separated by approximately 21 meV were observed around 0.9185 eV (1350 nm). These peaks are zero phonon lines of intraband transitions in the VSi 3d shell. The optical absorption near the band edge was observed to be sample dependent. The variation of the band gap as a function of temperature is also observed to be sample dependent.

scholarly journals First-Principles Calculations of the Urbach Tail in the Optical Absorption Spectra of Silica Glass

2011 ◽  
Vol 106 (2) ◽  
Author(s):  
B. Sadigh ◽  
P. Erhart ◽  
D. Åberg ◽  
A. Trave ◽  
E. Schwegler ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
First Principles ◽  
Silica Glass ◽  
Optical Absorption Spectra ◽  
First Principles Calculations ◽  
Urbach Tail

First-principles calculations of 4f–5d optical absorption spectra in BaMgAl10O17:Eu

2007 ◽  
Vol 122-123 ◽  
pp. 104-106 ◽  
Author(s):  
H. Toyoshima ◽  
S. Watanabe ◽  
K. Ogasawara ◽  
H. Yoshida
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
First Principles ◽  
Optical Absorption Spectra ◽  
First Principles Calculations
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