Determination of absolute value of quantum efficiency of radiation in high quality GaN single crystals using an integrating sphere

2016 ◽  
Vol 120 (1) ◽  
pp. 015704 ◽  
Author(s):  
Kazunobu Kojima ◽  
Tomomi Ohtomo ◽  
Ken-ichiro Ikemura ◽  
Yoshiki Yamazaki ◽  
Makoto Saito ◽  
...  
Keyword(s):  
Single Crystals ◽  
Quantum Efficiency ◽  
Integrating Sphere ◽  
High Quality ◽  
Absolute Value

Absolute determination of photoluminescence quantum efficiency using an integrating sphere setup

2014 ◽  
Vol 85 (12) ◽  
pp. 123115 ◽  
Author(s):  
S. Leyre ◽  
E. Coutino-Gonzalez ◽  
J. J. Joos ◽  
J. Ryckaert ◽  
Y. Meuret ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Integrating Sphere ◽  
Absolute Determination

Thermal lens determination of fluorescence quantum efficiency of3F4level of Tm3+ions in solids

2005 ◽  
Vol 125 ◽  
pp. 193-196 ◽  
Author(s):  
S. L. Oliveira ◽  
S. M. Lima ◽  
T. Catunda ◽  
H. Vargas ◽  
L. A.O. Nunes ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Thermal Lens

A TECHNIQUE FOR THE GROWTH OF HIGH QUALITY SINGLE CRYSTALS OF ICE

1987 ◽  
Vol 48 (C1) ◽  
pp. C1-595-C1-598 ◽  
Author(s):  
M. OHTOMO ◽  
S. AHMAD ◽  
R. W. WHITWORTH
Keyword(s):  
Single Crystals ◽  
High Quality

Disability as a social phenomenon

2020 ◽  
pp. 22-38
Author(s):  
Natalia Guseva ◽  
Vitaliy Berdutin
Keyword(s):  
Social Protection ◽  
Russian Society ◽  
Stage Model ◽  
High Quality ◽  
Rehabilitation Programs ◽  
Current State ◽  
The Social ◽  
Consistent Solution ◽  
First Time

At present, the problem of establishing disability is a point at issue in Russia. Despite the fact that medical criteria for disability are being developed very actively, high-quality methods for assessing social hallmarks are still lacking. Since disability is a phenomenon inherent in any society, each state forms a social and economic policy for people with disabilities in accordance with its level of development, priorities and opportunities. We have proposed a three-stage model, which includes a system for the consistent solution of the main tasks aimed at studying the causes and consequences of the problems encountered today in the social protection of citizens with health problems. The article shows why the existing approaches to the determination of disability and rehabilitation programs do not correspond to the current state of Russian society and why a decrease in the rate of persons recognized as disabled for the first time does not indicate an improvement in the health of the population. The authors proposed a number of measures with a view to correcting the situation according to the results of the study.

scholarly journals Flux Method Growth of Large Size Group IV–V 2D GeP Single Crystals and Photoresponse Application

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 235
Author(s):  
Shuqi Zhao ◽  
Tongtong Yu ◽  
Ziming Wang ◽  
Shilei Wang ◽  
Limei Wei ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
High Performance ◽  
Group Iv ◽  
X Ray Diffraction ◽  
High Quality ◽  
Practical Applications ◽  
Large Size ◽  
Growth Method ◽  
Polarized Raman

Two-dimensional (2D) materials driven by their unique electronic and optoelectronic properties have opened up possibilities for their various applications. The large and high-quality single crystals are essential to fabricate high-performance 2D devices for practical applications. Herein, IV-V 2D GeP single crystals with high-quality and large size of 20 × 15 × 5 mm3 were successfully grown by the Bi flux growth method. The crystalline quality of GeP was confirmed by high-resolution X-ray diffraction (HRXRD), Laue diffraction, electron probe microanalysis (EPMA) and Raman spectroscopy. Additionally, intrinsic anisotropic optical properties were investigated by angle-resolved polarized Raman spectroscopy (ARPRS) and transmission spectra in detail. Furthermore, we fabricated high-performance photodetectors based on GeP, presenting a relatively large photocurrent over 3 mA. More generally, our results will significantly contribute the GeP crystal to the wide optoelectronic applications.

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