THz emission efficiency of Grating-Outcoupled nonlinear-mixing heterolasers

2010 ◽  
Author(s):  
Alexey V. Andrianov ◽  
Alexey A. Belyanin ◽  
Vitaly V. Kocharovsky ◽  
Vladimir V. Kocharovsky
Keyword(s):  
Emission Efficiency ◽  
Nonlinear Mixing

Spontaneous emission efficiency of compressively strained 1.5 μm MQW lasers

1992 ◽  
Vol 28 (8) ◽  
pp. 717
Author(s):  
A.R. Adams ◽  
J. Braithwaite ◽  
V.A. Wilkinson ◽  
A.R. Adams
Keyword(s):  
Spontaneous Emission ◽  
Emission Efficiency

scholarly journals Nonlinear Mixing Characteristics of Reflectance Spectra of Typical Mineral Pigments

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 626
Author(s):  
Shuqiang Lyu ◽  
Die Meng ◽  
Miaole Hou ◽  
Shuai Tian ◽  
Chunhao Huang ◽  
...  
Keyword(s):  
Nonlinear Model ◽  
Experimental Approach ◽  
Spectral Characteristics ◽  
Chinese Painting ◽  
Mixing Models ◽  
Nonlinear Mixing ◽  
Shortwave Infrared ◽  
Fully Constrained Least Squares ◽  
Spectral Mixing ◽  
Continuum Removal

Hyperspectral technology has been used to identify pigments that adhere to the surfaces of polychrome artifacts. However, the colors are often produced by the mixing of pigments, which requires that the spectral characteristics of the pigment mixtures be considered before pigment unmixing is conducted. Therefore, we proposed an experimental approach to investigate the nonlinear degree of spectral reflectance, using several mixing models, and to evaluate their performances in the study of typical mineral pigments. First, five mineral pigments of azurite, malachite, cinnabar, orpiment, and calcite were selected to form five groups of samples, according to their different mass ratios. Second, a fully constrained least squares algorithm based on the linear model and three algorithms based on the nonlinear model were employed to calculate the proportion of each pigment in the mixtures. We evaluated the abundance accuracy as well as the similarity between the measured and reconstructed spectra produced by those mixing models. Third, we conducted pigment unmixing on a Chinese painting to verify the applicability of the nonlinear model. Fourth, continuum removal was also introduced to test the nonlinearity of mineral pigment mixing. Finally, the results indicated that the spectral mixing of different mineral pigments was more in line with the nonlinear mixing model. The spectral nonlinearity of mixed pigments was higher near to the wavelength corresponding to their colors. Meanwhile, the nonlinearity increased with the wavelength increases in the shortwave infrared bands.

Homoleptic Cyclometalated Dibenzothiophene-NHC-Iridium(III) Complexes for Efficient Blue Phosphorescent Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Bo-Sun Yun ◽  
So-Yoen Kim ◽  
Jin-Hyoung Kim ◽  
Ho-Jin Son ◽  
Sang Ook Kang
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emission Efficiency ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Phosphorescent

The NHC-Ir complexes f-IrSiPr, m-IrSiPr, and m-IrSMe, in which a dibenzothiophene (DBT) moiety is used to increase the emission efficiency for deep-blue phosphorescence, were synthesized and compared with the dibenzofuran...

scholarly journals Improving the emission efficiency of MBE-grown GaN/AlN QDs by strain control

2011 ◽  
Vol 6 (1) ◽  
pp. 611 ◽  
Author(s):  
Lang Niu ◽  
Zhibiao Hao ◽  
Jiannan Hu ◽  
Yibin Hu ◽  
Lai Wang ◽  
...  
Keyword(s):  
Strain Control ◽  
Emission Efficiency

Kathodo- und Photolumineszenz der Seltenerd-aktivierten Wirtsgitter Ba2La2B2+Te2O12 (B = Zn, Mg)

1986 ◽  
Vol 41 (6) ◽  
pp. 866-870 ◽  
Author(s):  
H.-D. Autenrieth ◽  
S. Kemmler-Sack
Keyword(s):  
Electronic Structure ◽  
Rare Earth ◽  
Visible Region ◽  
Host Lattice ◽  
Rare Earth Ions ◽  
New Host ◽  
Emission Efficiency ◽  
Transfer Processes ◽  
Trivalent Rare Earth ◽  
Host Lattices

By activation of the new host lattices Ba2La2B2+Te2O12 (B = Zn, Mg) with trivalent rare earth ions Ln3+ = Pr. Sm, Eu, Tb, Dy, Ho, Tm an emission in the visible region is observed. The influence of the electronic structure and concentration on the relative emission efficiency as well as the host lattice participation in the energy transfer processes are discussed.

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