scholarly journals Radiative decay rates of impurity states in semiconductor nanocrystals

AIP Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 107126 ◽  
Author(s):  
Vadim K. Turkov ◽  
Alexander V. Baranov ◽  
Anatoly V. Fedorov ◽  
Ivan D. Rukhlenko
Keyword(s):  
Radiative Decay ◽  
Semiconductor Nanocrystals ◽  
Decay Rates ◽  
Impurity States

Radiative decay rates in LaF3:Dy3+

1979 ◽  
Vol 63 (1) ◽  
pp. 90-92 ◽  
Author(s):  
H. Jagannath ◽  
A. Sivaram ◽  
D. Ramachandra Rao ◽  
P. Venkateswarlu
Keyword(s):  
Radiative Decay ◽  
Decay Rates

scholarly journals Experimental and theoretical radiative decay rates for highly excited ruthenium atomic levels and the solar abundance of ruthenium

2009 ◽  
Vol 396 (4) ◽  
pp. 2124-2132 ◽  
Author(s):  
V. Fivet ◽  
P. Quinet ◽  
P. Palmeri ◽  
É. Biémont ◽  
M. Asplund ◽  
...  
Keyword(s):  
Radiative Decay ◽  
Decay Rates ◽  
Solar Abundance

Single Particle Spectroscopy of Radiative Processes in Colloid-to-Film-Coupled Nanoantennas

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1593-1606 ◽  
Author(s):  
Max J. Schnepf ◽  
Yannic Brasse ◽  
Fabian R. Goßler ◽  
Anja Maria Steiner ◽  
Julian Obermeier ◽  
...  
Keyword(s):  
Single Particle ◽  
Radiative Decay ◽  
Single Photon ◽  
Photon Counting ◽  
Life Time ◽  
Fluorescence Decay ◽  
Decay Rates ◽  
Single Photon Counting ◽  
Radiative Processes ◽  
Particle Level

Abstract We present a fluorescent emitter (rhodamine B) coupled to a dielectric or metallic interface as well as a metallic cavity to study their radiative decay processes. Supported by finite-difference time-domain (FDTD) simulations, we correlate the non-radiative and radiative decay rates with the absorption and scattering cross section efficiencies, respectively. On a single particle level, we use atomic force microscopy (AFM), scanning electron microscopy (SEM), scattering spectroscopy, fluorescence life time imaging (FLIM) and time-correlated single photon counting (TCSPC) to evaluate the enhanced fluorescence decay at the same location. With this study, we show a colloidal gain material, which can be integrated into lattices using existing directed self-assembled methods to study their coherent energy transfer.

scholarly journals Effect of the Substitution Position on the Electronic and Solvatochromic Properties of Isocyanoaminonaphthalene (ICAN) Fluorophores

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2434 ◽  
Author(s):  
Sándor Lajos Kovács ◽  
Miklós Nagy ◽  
Péter Pál Fehér ◽  
Miklós Zsuga ◽  
Sándor Kéki
Keyword(s):  
Radiative Decay ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Decay Rates ◽  
Quantum Yields ◽  
Time Resolved Fluorescence ◽  
Solvatochromic Shift ◽  
Fluorescence Emission Spectra ◽  
Time Resolved ◽  
Donor And Acceptor

The properties of 1,4-isocyanoaminonaphthalene (1,4-ICAN) and 2,6-isocyanoaminonaphthalene (2,6-ICAN) isomers are discussed in comparison with those of 1,5-isocyanoaminonaphthalene (1,5-ICAN), which exhibits a large positive solvatochromic shift similar to that of Prodan. In these isocyanoaminonaphthalene derivatives, the isocyano and the amine group serve as the donor and acceptor moieties, respectively. It was found that the positions of the donor and the acceptor groups in these naphthalene derivatives greatly influence the Stokes and solvatochromic shifts, which decrease in the following order: 1,5-ICAN > 2,6-ICAN > 1,4-ICAN. According to high-level quantum chemical calculations, this order is well correlated with the charge transfer character of these compounds upon excitation. Furthermore, unlike 1,5-ICAN, the 1,4-ICAN and 2,6-ICAN isomers showed relatively high quantum yields in water, that were determined to be 0.62 and 0.21, respectively. In addition, time-resolved fluorescence experiments revealed that both the radiative and non-radiative decay rates for these three ICAN isomers varied unusually with the solvent polarity parameter ET(30). The explanations of the influence of the solvent polarity on the resulting steady-state and time-resolved fluorescence emission spectra are also discussed.

scholarly journals Parametric Calculations of Radiative Decay Rates for Magnetic Dipole and Electric Quadrupole Transitions in Tm IV, Yb V, and Er IV

Atoms ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 52
Author(s):  
Wan-Ü Tchang-Brillet ◽  
Jean-François Wyart ◽  
Ali Meftah ◽  
Sofiane Ait Mammar
Keyword(s):  
Magnetic Dipole ◽  
Radiative Decay ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Electric Quadrupole ◽  
Decay Rates ◽  
Line Intensities ◽  
Parametric Studies ◽  
On Line ◽  
Semi Empirical

Semi-empirical transition probabilities for magnetic dipole (M1) and electric quadrupole (E2) emission lines have been derived from parametric studies of experimental energy levels in Tm3+ (Tm IV), Yb4+ (Yb V), and Er3+ (Er IV), using Cowan codes. Results are compared with those existing from ab initio calculations or from more sophisticated semi-empirical calculations. Satisfactory agreements show that simple parametric calculations can provide good predictions on line intensities, provided that experimental levels are available, allowing reliable fits of energy parameters.

Experimental and theoretical investigation of radiative decay rates of metastable levels in La II

2002 ◽  
Vol 65 (6) ◽  
Author(s):  
A. Derkatch ◽  
L. Ilyinsky ◽  
S. Mannervik ◽  
L.-O. Norlin ◽  
D. Rostohar ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Radiative Decay ◽  
Decay Rates
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