Preparation and Properties of Hydrogen Ated Amorphous Germanium Nitride a-GeNx:H

1997 ◽  
Vol 467 ◽  
Author(s):  
M. Hioki ◽  
S. Nitta ◽  
Y. Takeda ◽  
K. Yamamoto ◽  
M. Sasaki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Outer Edge ◽  
Optical Absorption Coefficient ◽  
Gap Energy ◽  
Optical Gap ◽  
Light Yellow ◽  
Carbon Impurities ◽  
Optical Gap Energy ◽  
The Magnetic Field ◽  
Content Of Oxygen

ABSTRACTThe properties of a-GeNx:H films have been studied including the effects of oxygen and carbon impurities. The contamination of a-GeNx:H with oxygen and carbon is expressed as a-GeNx(OyCz):H, where x=N/Ge, y=O/Ge and z=C/Ge. The characteristics of a-GeNx(OyCz):H are summarized as follows: the sample is transparent at the center of a film, and the color of a film varies to light yellow and to brown at the outer edge depending on the magnetic field of the magnetron sputtering. The compositional ratios of the film vary from x=0.34 to 0.28, y=0.15 to 0.25 and z=0.05 to 0.02 at the center and at outer edge of a film, respectively. Optical gap energy EO5, obtained by the photon energy at optical absorption coefficient of 5×103 cm−1, are 2.9 eV at the center and 1.7 eV at the outer edge of a film. Eo5 increases with the nitrogen content x in a-GeNx(OyCz):H but is independent of the content of oxygen and carbon.

scholarly journals Investigation of Light Absorption in a ZnS Quantum Dot

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Hojjatollah K. Salehani ◽  
Maedeh Zakeri
Keyword(s):  
Magnetic Field ◽  
Optical Absorption ◽  
Quantum Dot ◽  
Excited States ◽  
Light Absorption ◽  
Blue Shift ◽  
Optical Absorption Coefficient ◽  
Parabolic Confinement ◽  
Parabolic Confinement Potential ◽  
The Magnetic Field

The light absorption of a ZnS quantum dot with a parabolic confinement potential is studied in this paper in the presence of magnetic field perpendicular to dot plane. The Schrodinger equation of a single electron is solved numerically, and energy spectra and wave functions are obtained. Then, the optical absorption coefficients in transition from ground state to different excited states are calculated. The effects the magnetic field and quantum dot width on the optical absorption are investigated. It is found that the optical absorption coefficient has a blue shift by increasing of magnetic field or confinement strength of quantum dot.

scholarly journals Analysis of Juno perijove 1 magnetic field data using the Jovian paraboloid magnetospheric model

2018 ◽  
Author(s):  
Ivan A. Pensionerov ◽  
Elena S. Belenkaya ◽  
Stanley W. H. Cowley ◽  
Igor I. Alexeev ◽  
Vladimir V. Kalegaev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Field Model ◽  
Outer Edge ◽  
Optimal Parameters ◽  
Magnetic Field Data ◽  
Analytic Expressions ◽  
Magnetic Field Model ◽  
Current Systems ◽  
The Magnetic Field

Abstract. One of the main features of Jupiter's magnetosphere is its equatorial magnetodisc, which significantly increases the field strength and size of the magnetosphere. Juno measurements of the magnetic field during the perijove 1 pass have allowed us to determine optimal parameters of the magnetodisc using the paraboloid magnetospheric magnetic field model, which employs analytic expressions for the magnetospheric current systems. Specifically within the model we determine the size of the Jovian magnetodisc and the magnetic field strength at its outer edge.

scholarly journals A Comparative Study the Calculation of the Optical Gap Energy and Urbach Energy in Undoped and Indium Doped ZnO Thin Films

2016 ◽  
Vol 8 (1) ◽  
pp. 01008-1-01008-5
Author(s):  
Said Benramache ◽  
◽  
Boubaker Benhaoua ◽  
Okba Belahssen ◽  
◽  
...  
Keyword(s):  
Thin Films ◽  
Comparative Study ◽  
Urbach Energy ◽  
Zno Thin Films ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy ◽  
Doped Zno

1.54 μm Photoluminescence of Erbium Implanted Hydrogenated Amorphous Silicon

1993 ◽  
Vol 298 ◽  
Author(s):  
M. Kechouane ◽  
N. Beldi ◽  
T. Mohammed-Brahim ◽  
H. L'Haridon ◽  
M. Salvi ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Emission Intensity ◽  
Hydrogenated Amorphous Silicon ◽  
Measurement Temperature ◽  
Gap Energy ◽  
Optical Gap ◽  
Film Content ◽  
Optical Gap Energy ◽  
First Time ◽  
Hydrogenated Amorphous

AbstractThe luminescence of erbium implanted in hydrogenated amorphous silicon (a-Si : H) is presented. For the first time an intense and relatively sharp luminescence at 1.54 mm is observed in a-Si : H, using implanted erbium. The Er+ emission intensity strongly depends on the hydrogen film content and on the measurement temperature. A direct correlation between the optical gap energy of the semiconductor and the hydrogen film content is observed.

ABSORPTION OF A HYDROGENIC DONOR QUANTUM DOT WITH MAGNETIC FIELD

2010 ◽  
Vol 24 (07) ◽  
pp. 657-663 ◽  
Author(s):  
JINSHENG HUANG ◽  
JIANHUI YUAN
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Quantum Dot ◽  
Optical Absorption Coefficient ◽  
Hydrogenic Donor ◽  
The Matrix ◽  
Diagonalization Method ◽  
Linear Optical Properties ◽  
Matrix Diagonalization ◽  
The Magnetic Field

An investigation of the optical properties of a hydrogenic donor in a disc-like parabolic quantum dot with magnetic field has been performed by using the matrix diagonalization method. The optical absorption coefficient between the ground (L = 0) and the first excited state (L = -1) have been examined based on the computed energies and wavefunctions. We found that the linear optical properties of the hydrogenic donor in QDs are strongly affected by the confinement strength and the magnetic field strength.

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