Photoacoustic Measurement of a-Si:H/a-SiNx:H Superlattice Films

1986 ◽  
Vol 77 ◽  
Author(s):  
Feng Xiaomei ◽  
Liu Hsiangna ◽  
Wang Zhichao ◽  
Qiu Shuye ◽  
He Yuliang
Keyword(s):  
Absorption Coefficient ◽  
Size Effect ◽  
Layer Thickness ◽  
Optical Transmission ◽  
Transmission Spectra ◽  
Superlattice Structure ◽  
Quantum Size ◽  
Peak Intensity ◽  
Optical Transmission Spectra ◽  
Photoacoustic Measurement

ABSTRACTPhotoacoustic (PAS) and optical transmission spectra were measured on a-Si:H/a-SiNx:H superlattices. The absorption coefficient ∝ in the range 102∼104 cm-1 was obtained by converting the PAS signal to ∝. The enhancement of the PAS peak intensity Qs and the increase in the width of the Urbach edge with decreasing a-Si:H layer thickness are explained as results of quantum size effect in the superlattice structure.

Observation of quantum‐size effects in optical transmission spectra of PbTe/Pb1−xEuxTe superlattices

1987 ◽  
Vol 51 (7) ◽  
pp. 478-480 ◽  
Author(s):  
Akihiro Ishida ◽  
Shuji Matsuura ◽  
Makoto Mizuno ◽  
Hiroshi Fujiyasu
Keyword(s):  
Size Effects ◽  
Optical Transmission ◽  
Quantum Size Effects ◽  
Transmission Spectra ◽  
Quantum Size ◽  
Optical Transmission Spectra

Depth of glass poling - via optical transmission spectra

Optik ◽  
2021 ◽  
pp. 167600
Author(s):  
Ekaterina Babich ◽  
Dmitrii Raskhodchikov ◽  
Ekaterina Lubyankina ◽  
Andrey Lipovskii
Keyword(s):  
Optical Transmission ◽  
Transmission Spectra ◽  
Optical Transmission Spectra

Structure and optical transmission spectra of ZnS–SiO2 nanocomposite films deposited at low temperatures

2015 ◽  
Vol 49 (10) ◽  
pp. 1327-1331 ◽  
Author(s):  
P. N. Krylov ◽  
R. M. Zakirova ◽  
I. A. Knyazev ◽  
N. V. Kostenkov ◽  
E. A. Romanov ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Optical Transmission ◽  
Nanocomposite Films ◽  
Transmission Spectra ◽  
Optical Transmission Spectra

Are the Temperature Sensors Based on Chalcogenide Glass Possible?

2013 ◽  
Vol 200 ◽  
pp. 316-320
Author(s):  
Mykhaylo Shpotyuk ◽  
Dmytro Chalyy ◽  
Oleh Shpotyuk ◽  
Mihail Iovu ◽  
Andrzej Kozdras ◽  
...  
Keyword(s):  
Chalcogenide Glasses ◽  
Optical Transmission ◽  
Optical Band Gap ◽  
Temperature Sensors ◽  
Sensitivity Index ◽  
Transmission Spectra ◽  
Scanning Calorimetry ◽  
Linear Character ◽  
Optical Transmission Spectra ◽  
Principal Possibility

Principal possibility of the using of chalcogenide glasses (on the example of Ge18As18Se64) as active media for temperature sensors is considered in this work. Differential scanning calorimetry testing of the investigated glasses shown that 2 years of natural storage does not lead to the drift of their DSC-parameters (glass transition temperature and endothermic peak area). Investigation of the temperature dependence of optical transmission spectra shows the linear character of optical band-gap changes with a temperature. Temperature sensitivity index β for Ge18As18Se64 is estimated to be equal to the ~1.2·10-3 eV/°C.

Facile synthesis of silica–titania core–shell microsphere and their optical transmission spectra

2013 ◽  
Vol 110 ◽  
pp. 260-263 ◽  
Author(s):  
Huihua Huang ◽  
Aihua Sun ◽  
Jianfei Zhang ◽  
Biao Wang ◽  
Chengyi Chu ◽  
...  
Keyword(s):  
Optical Transmission ◽  
Core Shell ◽  
Transmission Spectra ◽  
Facile Synthesis ◽  
Optical Transmission Spectra

Reformulation of pairing theory

1988 ◽  
Vol 02 (05) ◽  
pp. 1101-1105 ◽  
Author(s):  
Miklos GULACSI ◽  
Zsolt GULACSI
Keyword(s):  
Transition Temperature ◽  
Size Effect ◽  
Layer Thickness ◽  
Short Communication ◽  
Cooper Pairing ◽  
Two Dimensional ◽  
Critical Transition ◽  
Critical Transition Temperature ◽  
Quantum Size ◽  
Natural Way

The original Cooper pairing theory is reformulated for electrons confined in a layer. This analysis is motivated by the quasi-two-dimensional character of the oxidic superconductors, in case of which the extension of the initial (3D) Cooper framework is practically impossible. By considering the electrons moving in a flat box, due to quantum size effect the properties of these oxidic superconductors can be explained in a natural way. In this short communication we will concentrate to the variation of the critical transition temperature due to the layer thickness and to the number of conduction (Cu-O) planes. The results are confirmed by the experiment. This being an evidence for the presence of the charge confinement effect in the oxidic superconductors.

Spin polarized conduction and valence band states in GdN

MRS Advances ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 153-158 ◽  
Author(s):  
Muhammad Azeem
Keyword(s):  
Valence Band ◽  
Optical Transmission ◽  
Energy Gap ◽  
Ferromagnetic State ◽  
Spin Splitting ◽  
Transmission Spectra ◽  
Temperature Dependent ◽  
Spin Polarized ◽  
Transmission Measurements ◽  
Optical Transmission Spectra

AbstractOptical transmission spectra are collected in the ferromagnetic state of GdN at various temperatures. The temperature dependent extinction coefficient extracted from the transmission measurements show that the conduction and valence band states are spin polarized. The results confirm the LSDA+U estimates of the energy gap associated with the majority/minority-spins and also the magnitude of the spin splitting.

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