scholarly journals Broadened Bandwidth Amplified Spontaneous Emission from Blue GaN-Based Short-Cavity Superluminescent Light-Emitting Diodes

2020 ◽  
Vol 9 (1) ◽  
pp. 015019 ◽  
Author(s):  
Hezhi Zhang ◽  
Ching-Wen Shih ◽  
Denis Martin ◽  
Alexander Caut ◽  
Jean-François Carlin ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Light Emitting Diodes ◽  
Amplified Spontaneous Emission ◽  
Light Emitting

Amplified spontaneous emission from ZnO in n-ZnO/ZnO nanodots–SiO2composite/p-AlGaN heterojunction light-emitting diodes

2009 ◽  
Vol 20 (16) ◽  
pp. 165201 ◽  
Author(s):  
Ying Tsang Shih ◽  
Mong Kai Wu ◽  
Wei Chih Li ◽  
Hon Kuan ◽  
Jer Ren Yang ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Light Emitting Diodes ◽  
Amplified Spontaneous Emission ◽  
Light Emitting

scholarly journals Synthesis, optical properties, and amplified spontaneous emission of hybrid Ag–SiO2–CdTe nanocomposite

2017 ◽  
Vol 95 (10) ◽  
pp. 933-940
Author(s):  
A.M. Saad ◽  
M.B. Mohamed ◽  
I.M. Azzouz
Keyword(s):  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Silica Shell ◽  
Thermal Therapy ◽  
Threshold Power ◽  
Excitation Wavelength ◽  
Exciton Absorption ◽  
Light Emitting ◽  
Cdte Nanoparticles ◽  
And Control

In this work, a hybrid nanocomposite of metal–dielectric–semiconductor, Ag–SiO2–CdTe, nanoparticles has been synthesized. Silica shell was used as a spacer to isolate and control the distance between Ag plasmonic and luminescent CdTe QDs. It was found that insertion of silica shell enhances the plasmonic field more than 31%. Accordingly, Ag-SiO2 plasmonic enhances the luminescence and quantum yield of CdTe quantum dots by 200% and 55%, respectively. The threshold power of amplified spontaneous emission of CdTe was found to depend on both temperature and excitation wavelength location with respect to plasmon and exciton absorption. This nanocomposite could be potentially used in light-emitting diodes, biological sensing, and thermal therapy.

scholarly journals Light Emission Properties of Thermally Evaporated CH3NH3PbBr3 Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 211
Author(s):  
Claudia Triolo ◽  
Maria Luisa De Giorgi ◽  
Antonella Lorusso ◽  
Arianna Cretì ◽  
Saveria Santangelo ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Light Emission ◽  
Amplified Spontaneous Emission ◽  
Stimulated Emission ◽  
Thin Layers ◽  
Light Emitting ◽  
Macro Scale ◽  
Localized Excitons ◽  
Emitting Species

Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH3NH3PbBr3 perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. These species also have a key role in the amplified spontaneous emission (ASE) process: for higher excitation densities, the relative contribution of localized EXs basically remains constant, while a clear competition between ASE and free EXs spontaneous emission is present, which suggests that ASE is due to stimulated emission from the free EXs.

scholarly journals Spontaneous Emission and Characteristics of Staggered InGaN Quantum-Well Light-Emitting Diodes

2008 ◽  
Vol 44 (6) ◽  
pp. 573-580 ◽  
Author(s):  
Ronald A Arif ◽  
Hongping Zhao ◽  
Yik-Khoon Ee ◽  
Nelson Tansu
Keyword(s):  
Quantum Well ◽  
Spontaneous Emission ◽  
Light Emitting Diodes ◽  
Light Emitting
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