Energy Up-Conversion at GaAs-GaInP2 and GaAs-AlGaInP2 Interfaces Caused by Cold Auger Processes

AbstractEfficient, low-temperature luminescence at energies far above that of the exciting cw-laser is reported at junctions of GaAs-GaInP2 and GaAs-AlxGa1−x.InP2. The signal originates from the high-band gap layers and disappears only if the excitation energy is tuned below the GaAs band gap, as monitored by up-converted photoluminescence excitation spectroscopy. This shows that the non-linear process is induced by the generation of electrons and holes in the GaAs. Furthermore, it is found that the up-conversion is only observed if the (A1)GaInP2 layers are CuPtB long-range ordered. The reason for this is the inherent presence of metastable states in these ordered alloys. It is argued that cold Auger processes cause the nonlinear effect at these type I interfaces.

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Single Crystal, High Band Gap CdS Thin Films Grown by RF Magnetron Sputtering in Argon Atmosphere for Solar Cell Applications

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.10(3).03005 ◽

2018 ◽

Vol 10 (3) ◽

pp. 03005-1-03005-6 ◽

Cited By ~ 1

Author(s):

Rupali Kulkarni ◽

◽

Amit Pawbake ◽

Ravindra Waykar ◽

Ashok Jadhawar ◽

...

Keyword(s):

Thin Films ◽

Solar Cell ◽

Magnetron Sputtering ◽

Single Crystal ◽

Band Gap ◽

Rf Magnetron Sputtering ◽

Argon Atmosphere ◽

Cds Thin Films ◽

High Band

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High Band Gap Nanocrystalline Tungsten Carbide (nc-WC) Thin Films Grown by Hot Wire Chemical Vapor Deposition (HW-CVD) Method

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.10(3).03001 ◽

2018 ◽

Vol 10 (3) ◽

pp. 03001-1-03001-6 ◽

Cited By ~ 2

Author(s):

Bharat Gabhale ◽

◽

Ashok Jadhawar ◽

Ajinkya Bhorde ◽

Shruthi Nair ◽

...

Keyword(s):

Thin Films ◽

Chemical Vapor Deposition ◽

Tungsten Carbide ◽

Band Gap ◽

Vapor Deposition ◽

Chemical Vapor ◽

Hot Wire ◽

Cvd Method ◽

High Band

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SIMULATED HYDROGEN CONCENTRATIONS IN LOW-TEMPERATURE TYPE I AND TYPE II SERPENTINIZED FLUIDS PREDICTED FROM MEASURED SOURCE WATERS AT THE OMANI OPHIOLITE

10.1130/abs/2017am-304293 ◽

2017 ◽

Author(s):

Sanjoy Som ◽

◽

Kaitlin Rempfert ◽

Tori M. Hoehler ◽

Alexis S. Templeton

Keyword(s):

Low Temperature ◽

Type I ◽

Type Ii ◽

Source Waters

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Genome-wide identification and expression pattern analysis of lipoxygenase gene family in banana

Scientific Reports ◽

10.1038/s41598-021-89211-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Fan Liu ◽

Hua Li ◽

Junwei Wu ◽

Bin Wang ◽

Na Tian ◽

...

Keyword(s):

High Temperature ◽

Low Temperature ◽

Pcr Analysis ◽

Type I ◽

Segmental Duplications ◽

Expression Levels ◽

Genome Wide ◽

Encoded Proteins ◽

Gene Structures ◽

Lipoxygenase Gene Family

AbstractThe LOX genes have been identified and characterized in many plant species, but studies on the banana LOX genes are very limited. In this study, we respectively identified 18 MaLOX, 11 MbLOX, and 12 MiLOX genes from the Musa acuminata, M. balbisiana and M. itinerans genome data, investigated their gene structures and characterized the physicochemical properties of their encoded proteins. Banana LOXs showed a preference for using and ending with G/C and their encoded proteins can be classified into 9-LOX, Type I 13-LOX and Type II 13-LOX subfamilies. The expansion of the MaLOXs might result from the combined actions of genome-wide, tandem, and segmental duplications. However, tandem and segmental duplications contribute to the expansion of MbLOXs. Transcriptome data based gene expression analysis showed that MaLOX1, 4, and 7 were highly expressed in fruit and their expression levels were significantly regulated by ethylene. And 11, 12 and 7 MaLOXs were found to be low temperature-, high temperature-, and Fusarium oxysporum f. sp. Cubense tropical race 4 (FocTR4)-responsive, respectively. MaLOX8, 9 and 13 are responsive to all the three stresses, MaLOX4 and MaLOX12 are high temperature- and FocTR4-responsive; MaLOX6 and MaLOX17 are significantly induced by low temperature and FocTR4; and the expression of MaLOX7 and MaLOX16 are only affected by high temperature. Quantitative real-time PCR (qRT-PCR) analysis revealed that the expression levels of several MaLOXs are regulated by MeJA and FocTR4, indicating that they can increase the resistance of banana by regulating the JA pathway. Additionally, the weighted gene co-expression network analysis (WGCNA) of MaLOXs revealed 3 models respectively for 5 (MaLOX7-11), 3 (MaLOX6, 13, and 17), and 1 (MaLOX12) MaLOX genes. Our findings can provide valuable information for the characterization, evolution, diversity and functionality of MaLOX, MbLOX and MiLOX genes and are helpful for understanding the roles of LOXs in banana growth and development and adaptations to different stresses.

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Emergence of fifth-order optical nonlinearity in 2-(2-Quinolyl)-1,3-indandione with strong third-order nonlinear effect under low power CW laser excitation

Chemical Physics Letters ◽

10.1016/j.cplett.2021.138434 ◽

2021 ◽

Vol 769 ◽

pp. 138434

Author(s):

I.P. Primsa ◽

M.C. Sreenath ◽

V.M. Anandakumar ◽

I. Hubert Joe

Keyword(s):

Low Power ◽

Nonlinear Effect ◽

Laser Excitation ◽

Optical Nonlinearity ◽

Third Order ◽

Cw Laser ◽

Fifth Order

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Excitation energy transfer in native and unstacked thylakoid membranes studied by low temperature and ultrafast fluorescence spectroscopy

Photosynthesis Research ◽

10.1007/s11120-007-9157-1 ◽

2007 ◽

Vol 93 (1-3) ◽

pp. 173-182 ◽

Cited By ~ 38

Author(s):

C. D. van der Weij-de Wit ◽

J. A. Ihalainen ◽

R. van Grondelle ◽

J. P. Dekker

Keyword(s):

Energy Transfer ◽

Low Temperature ◽

Fluorescence Spectroscopy ◽

Excitation Energy ◽

Excitation Energy Transfer ◽

Thylakoid Membranes

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Design of direct band gap type I GeSn/Ge quantum dots for mid-IR light emitters on Si substrate

physica status solidi (RRL) - Rapid Research Letters ◽

10.1002/pssr.201700047 ◽

2017 ◽

Vol 11 (5) ◽

pp. 1700047 ◽

Cited By ~ 6

Author(s):

Bouraoui Ilahi

Keyword(s):

Quantum Dots ◽

Band Gap ◽

Type I ◽

Si Substrate ◽

Light Emitters ◽

Direct Band Gap ◽

Direct Band ◽

Ge Quantum Dots ◽

Ir Light

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Vibrational relaxation and photochemistry studied by photoluminescence excitation spectroscopy in low temperature matrices. I. Cyclic ketones

The Journal of Physical Chemistry ◽

10.1021/j100544a006 ◽

1976 ◽

Vol 80 (3) ◽

pp. 244-247 ◽

Cited By ~ 3

Author(s):

Luisa T. Molina ◽

Edward K. C. Lee

Keyword(s):

Low Temperature ◽

Vibrational Relaxation ◽

Photoluminescence Excitation ◽

Cyclic Ketones

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Spectroscopic Analysis and Synthesis of Wide Band Gap CdS Quantum Dots Using Colloidal Synthesis Technique at Low Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.67.191 ◽

2009 ◽

Vol 67 ◽

pp. 191-196 ◽

Cited By ~ 1

Author(s):

Lubna Hashmi ◽

M.S. Qureshi ◽

R.N. Dubey ◽

M.M. Malik ◽

Ishrat Alim ◽

...

Keyword(s):

Low Temperature ◽

Band Gap ◽

Spectroscopic Analysis ◽

Quantum Confinement Effect ◽

Wide Band ◽

Colloidal Synthesis ◽

Visible Range ◽

Wide Band Gap ◽

Synthesis Technique ◽

Analysis And Synthesis

A broad range of II-VI materials has been investigated in order to produce light in the full visible range for optoelectronic applications. The present investigation was carried out for the spectroscopic analysis and synthesis of wide band gap cadmium sulfide nanoparticles. Large-band gap semiconductors have the added advantage in that; they can support higher electric field before breaking down, which means that they can be used for high-power electronic devices.Synthesis has been carried out using colloidal synthesis technique at low temperature. The size, stabilization and optical properties were studied using UV-vis Spectrophotometer and Spectroflourometer. Further, the structural studies of synthesized powder were carried out using X-ray diffraction technique; which also confirms the formation of desired product. The capping ligand and the impurities present in the sample were characterized by Fourier transform infra red spectroscopy. Synthesized CdS powder dispersed in aqueous media gave the value of 193 nm for the onset wavelength using UV-vis spectrophotometer, which is significantly blue-shifted compared to bulk CdS and shows the quantum confinement effect. From the onset wavelength the radius of CdS quantum dot calculated using the Brus equation was found to be ca. 0.7 nm.

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