Photoluminescence enhancement from GaN by beryllium doping

2016 ◽  
Vol 60 ◽  
pp. 398-403 ◽  
Author(s):  
R. García-Gutiérrez ◽  
A. Ramos-Carrazco ◽  
D. Berman-Mendoza ◽  
G.A. Hirata ◽  
O.E. Contreras ◽  
...  
Keyword(s):  
Photoluminescence Enhancement ◽  
Beryllium Doping

scholarly journals Giant Photoluminescence Enhancement and Carrier Dynamics in MoS2 Bilayers with Anomalous Interlayer Coupling

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1994
Author(s):  
Han Li ◽  
Yating Ma ◽  
Zhongjie Xu ◽  
Xiang’ai Cheng ◽  
Tian Jiang
Keyword(s):  
Optical Properties ◽  
Transition Metal Dichalcogenides ◽  
Interlayer Coupling ◽  
Carrier Dynamics ◽  
Probe Signal ◽  
Exciton Resonance ◽  
Pump Probe ◽  
Metal Dichalcogenides ◽  
Photoluminescence Enhancement ◽  
Probe Measurements

Fundamental researches and explorations based on transition metal dichalcogenides (TMDCs) mainly focus on their monolayer counterparts, where optical densities are limited owing to the atomic monolayer thickness. Photoluminescence (PL) yield in bilayer TMDCs is much suppressed owing to indirect-bandgap properties. Here, optical properties are explored in artificially twisted bilayers of molybdenum disulfide (MoS2). Anomalous interlayer coupling and resultant giant PL enhancement are firstly observed in MoS2 bilayers, related to the suspension of the top layer material and independent of twisted angle. Moreover, carrier dynamics in MoS2 bilayers with anomalous interlayer coupling are revealed with pump-probe measurements, and the secondary rising behavior in pump-probe signal of B-exciton resonance, originating from valley depolarization of A-exciton, is firstly reported and discussed in this work. These results lay the groundwork for future advancement and applications beyond TMDCs monolayers.

Photoluminescence enhancement by controllable aggregation and polymerization of octanuclear gold clusters

2021 ◽  
Author(s):  
Biao Yang ◽  
Han Wu ◽  
Liang Zhao
Keyword(s):  
Gold Clusters ◽  
Polymer Backbone ◽  
Photoluminescence Enhancement

An Au8 cluster was decorated by different ligands or incorporated into a polymer backbone to investigate distinguishable aggregation-induced luminescence behaviors.

Photoluminescence enhancement via microwave irradiation of carbon quantum dots derived from solvothermal synthesis of l-arginine

2019 ◽  
Vol 43 (2) ◽  
pp. 689-695 ◽  
Author(s):  
Khalid M. Omer ◽  
Kosar H. Hama Aziz ◽  
Yousif M. Salih ◽  
Diary I. Tofiq ◽  
Aso Q. Hassan
Keyword(s):  
Quantum Dots ◽  
Microwave Irradiation ◽  
Solvothermal Synthesis ◽  
Carbon Quantum Dots ◽  
Photoluminescence Enhancement

Photoluminescence enhancement of carbon quantum dots was achieved via solvothermal synthesis followed by microwave irradiation.

scholarly journals Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 4009-4019
Author(s):  
Artur Movsesyan ◽  
Gwénaëlle Lamri ◽  
Sergei Kostcheev ◽  
Anke Horneber ◽  
Annika Bräuer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Enhancement Factor ◽  
Second Harmonic ◽  
Plasmon Mode ◽  
Excitation Wavelength ◽  
Resonant System ◽  
Two Photon ◽  
Plasmon Resonances ◽  
Resonant Systems ◽  
Photoluminescence Enhancement

AbstractMulti-resonant plasmonic simple geometries like nanocylinders and nanorods are highly interesting for two-photon photoluminescence and second harmonic generation applications, due to their easy fabrication and reproducibility in comparison with complex multi-resonant systems like dimers or nanoclusters. We demonstrate experimentally that by using a simple gold nanocylinder we can achieve a double resonantly enhanced two-photon photoluminescence of quantum dots, by matching the excitation wavelength of the quantum dots with a dipolar plasmon mode, while the emission is coupled with a radiative quadrupolar mode. We establish a method to separate experimentally the enhancement factor at the excitation and at the emission wavelengths for this double resonant system. The sensitivity of the spectral positions of the dipolar and quadrupolar plasmon resonances to the ellipticity of the nanocylinders and its impact on the two-photon photoluminescence enhancement are discussed.

scholarly journals Photoluminescence Enhancement in ScPO4:Zr4+, Mn2+ Phosphor

2008 ◽  
Vol 32 (2) ◽  
pp. 103-106
Author(s):  
Mamoru KITAURA ◽  
Yohei INADA ◽  
Kazutoshi FUKUI
Keyword(s):  
Photoluminescence Enhancement
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