Dielectric function and optical transitions of silicon nanocrystals between 0.6 eV and 6.5 eV

2008 ◽  
Vol 205 (4) ◽  
pp. 845-848 ◽  
Author(s):  
M. Mansour ◽  
A. En Naciri ◽  
L. Johann ◽  
J. J. Grob ◽  
M. Stchakovsky
Keyword(s):  
Dielectric Function ◽  
Silicon Nanocrystals ◽  
Optical Transitions

Influence of the implantation profiles of Si+ on the dielectric function and optical transitions in silicon nanocrystals

2008 ◽  
Vol 129 (18) ◽  
pp. 184701 ◽  
Author(s):  
A. En Naciri ◽  
M. Mansour ◽  
L. Johann ◽  
J. J. Grob ◽  
H. Rinnert
Keyword(s):  
Dielectric Function ◽  
Silicon Nanocrystals ◽  
Optical Transitions

Determination and Critical Assessment of the Optical Properties of Common Substrate Materials Used in III-V Nitride Heterostructures with Vacuum Ultraviolet Spectroscopic Ellipsometry

2001 ◽  
Vol 693 ◽  
Author(s):  
N.V. Edwards ◽  
O.P.A. Lindquist ◽  
L.D. Madsen ◽  
S. Zollner ◽  
K. Järrehdahl ◽  
...  
Keyword(s):  
Optical Properties ◽  
Dielectric Function ◽  
Spectroscopic Ellipsometry ◽  
Optical Constants ◽  
Vacuum Ultraviolet ◽  
Critical Assessment ◽  
Optical Transitions ◽  
Common Substrate ◽  
Materials Used

AbstractAs a first step toward enabling the in-line metrology of III-V nitride heterostructure and materials, we present the optical constants of the two common substrate materials over an unprecendented spectral range. Vacuum Ultraviolet spectroscopic ellipsometry (VUVSE) was used to obtain the optical constants for Al2O3 and the ordinary and extra-ordinary component of the dielectric function for both 4H- and 6H-SiC. The results are discussed in the context of anisotropy, polytypism, bandstructure, optical transitions, and preparation/characterization of abrupt surfaces, where appropriate.

scholarly journals Photoluminescence measurements of zero-phonon optical transitions in silicon nanocrystals

2011 ◽  
Vol 84 (12) ◽  
Author(s):  
I. Sychugov ◽  
J. Valenta ◽  
K. Mitsuishi ◽  
M. Fujii ◽  
J. Linnros
Keyword(s):  
Silicon Nanocrystals ◽  
Optical Transitions

Highly Luminescent Silicon Nanocrystals with Discrete Optical Transitions

2001 ◽  
Vol 123 (16) ◽  
pp. 3743-3748 ◽  
Author(s):  
Justin D. Holmes ◽  
Kirk J. Ziegler ◽  
R. Christopher Doty ◽  
Lindsay E. Pell ◽  
Keith P. Johnston ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Optical Transitions

CuAl1−xInxSe2 solid solutions: Dielectric function and inter-band optical transitions

2008 ◽  
Vol 517 (4) ◽  
pp. 1442-1444 ◽  
Author(s):  
YongGu Shim ◽  
Kouji Hasegawa ◽  
Kazuki Wakita ◽  
Nazim Mamedov
Keyword(s):  
Dielectric Function ◽  
Solid Solutions ◽  
Optical Transitions

Optical properties of pure and TM-doped single-walled ZnO nanotubes (8,0) (TM = V and Co) by first principles calculations

2016 ◽  
Vol 30 (01) ◽  
pp. 1550255 ◽  
Author(s):  
R. Taghavi Mendi ◽  
M. Majidiyan Sarmazdeh ◽  
A. Boochani ◽  
S. M. Elahi ◽  
S. Naderi
Keyword(s):  
Dielectric Constant ◽  
Optical Properties ◽  
Energy Range ◽  
Dielectric Function ◽  
Optical Conductivity ◽  
Optical Transitions ◽  
Optical Reflectivity ◽  
Zno Nanotubes ◽  
Low Energies ◽  
Co Doped

In this paper, some optical properties of pure and transition metal-doped (TM = Co and V) single-walled ZnO nanotubes (8,0) (SWZnONT(8,0)) such as, real and imaginary parts of the dielectric function, optical conductivity, refractive index and optical reflectivity, were investigated. The calculations have been performed within framework of the density functional theory (DFT) using the full potential linearized augmented plane wave (FP-LAPW) and the generalized gradient approximation (GGA). The results show that, optical properties of SWZnONT(8,0) are anisotropic, especially at low energies and this anisotropy at low energies increases with doping of V in SWZnONT(8,0) while the Co-doped SWZnONT(8,0) behaves like pure SWZnONT(8,0). Doping of ZnO nanotubes has a significant impact on the value of the dielectric constant, so that due to the presence of V atom, the dielectric constant is increased up to three times. Study of the imaginary part of the dielectric function and optical conductivity showed that the important energy range for absorption processes and optical transitions is low energy range to 15 eV. The optical transitions have been studied based on band structure and density of states. The results of the optical reflectivity showed that these nanotubes are transparent in a wide energy ranges which provide them for using in transparent coatings. In addition, due to the reported magnetic properties for V- and Co-doped ZnO nanotubes, these nanotubes are suitable for using in spintronics and magneto-optic devices.

Quasi-Direct Optical Transitions in Silicon Nanocrystals with Intensity Exceeding the Bulk

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 1583-1589 ◽  
Author(s):  
Benjamin G. Lee ◽  
Jun-Wei Luo ◽  
Nathan R. Neale ◽  
Matthew C. Beard ◽  
Daniel Hiller ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Optical Transitions

Temperature behavior of dielectric function spectra and optical transitions in TlGaS2

2015 ◽  
Vol 252 (6) ◽  
pp. 1254-1257 ◽  
Author(s):  
YongGu Shim ◽  
Toshiyuki Kawabata ◽  
Kazuki Wakita ◽  
Nazim Mamedov
Keyword(s):  
Dielectric Function ◽  
Temperature Behavior ◽  
Optical Transitions
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