Impact of temperature on excitation, emission and cross-relaxation processes of terbium ions in GGAG single crystal

2019 ◽  
Vol 789 ◽  
pp. 409-415 ◽  
Author(s):  
Piotr Solarz ◽  
Michał Głowacki ◽  
Radosław Lisiecki ◽  
Marcin Sobczyk ◽  
Jarosław Komar ◽  
...  
Keyword(s):  
Single Crystal ◽  
Cross Relaxation ◽  
Relaxation Processes

scholarly journals Процессы передачи энергии в эвлитите Sr-=SUB=-3-=/SUB=-Y(PO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-, по отдельности и одновременно легированном ионами Tb-=SUP=-3+-=/SUP=- и Tm-=SUP=-3+-=/SUP=-

2022 ◽  
Vol 130 (1) ◽  
pp. 99
Author(s):  
Xiaowu Hu ◽  
Fabio Piccinelli ◽  
Marco Bettinelli
Keyword(s):  
Energy Transfer ◽  
Optical Spectroscopy ◽  
Emission Spectra ◽  
Cross Relaxation ◽  
Transfer Efficiency ◽  
Relaxation Processes ◽  
Donor Concentration ◽  
Acceptor Concentration ◽  
Transfer Processes ◽  
Double Phosphate

In this work the optical spectroscopy and the energy transfer processes involving the Tb3+and Tm3+ ions, have been studied in eulytite double phosphate hosts of the type Sr3Y(PO4)3 doped with various amounts of the two Ln ions. It has been found that several energy transfer and cross-relaxation processes are active in this class of materials, upon excitation in the 5D4 level of Tb, and in the 1G4 one of Tm. In particular, a Tb→Tm transfer of excitation has been found to quench strongly the 5D4 level of Tb. This process occurs with a transfer efficiency increasing from 0.08 to 0.62, for a donor concentration of 2 mol%, and an acceptor concentration increasing from 2 to 15 mol%. The emission spectra are strongly affected by the presence of Tb⟷Tm energy transfer, and Tm→Tm cross relaxation processes.

Proton NMR Relaxation Effects. Cross‐Relaxation Processes in Pure Liquids

1968 ◽  
Vol 49 (4) ◽  
pp. 1571-1576 ◽  
Author(s):  
A. A. Brooks ◽  
J. D. Cutnell ◽  
E. O. Stejskal ◽  
V. W. Weiss
Keyword(s):  
Proton Nmr ◽  
Nmr Relaxation ◽  
Cross Relaxation ◽  
Relaxation Processes ◽  
Relaxation Effects

Relaxation Processes of AlGaN/GaN Heterostructures Grown onto Single Crystal GaN(0001) Substrates

1999 ◽  
Vol 176 (1) ◽  
pp. 285-290 ◽  
Author(s):  
S. H. Christiansen ◽  
M. Albrecht ◽  
H. P. Strunk ◽  
C. T. Foxon ◽  
D. Korakakis ◽  
...  
Keyword(s):  
Single Crystal ◽  
Relaxation Processes

Cross-relaxation processes from the4S3/2 level of the Er3+ ion in Lu3Al5O12

1988 ◽  
Vol 48 (4) ◽  
pp. 439-441 ◽  
Author(s):  
G. G. Demirkhanyan ◽  
R. B. Kostanyan ◽  
F. P. Safaryan ◽  
T. V. Sanamyan
Keyword(s):  
Cross Relaxation ◽  
Relaxation Processes

scholarly journals Energy Transfer and Cross-Relaxation Induced Efficient 2.78 μm Emission in Er3+/Tm3+: PbF2 mid-Infrared Laser Crystal

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1024
Author(s):  
Jiayu Liao ◽  
Qiudi Chen ◽  
Xiaochen Niu ◽  
Peixiong Zhang ◽  
Huiyu Tan ◽  
...  
Keyword(s):  
Energy Transfer ◽  
First Principles ◽  
Spectroscopic Properties ◽  
Transfer Mechanism ◽  
Cross Relaxation ◽  
Relaxation Processes ◽  
Energy Transfer Mechanism ◽  
First Principles Calculations ◽  
Laser Materials ◽  
Mid Infrared

An efficient enhancement of 2.78 μm emission from the transition of Er3+: 4I11/2 → 4I13/2 by Tm3+ introduction in the Er/Tm: PbF2 crystal was grown by the Bridgman technique for the first time. The spectroscopic properties, energy transfer mechanism, and first-principles calculations of as-grown crystals were investigated in detail. The co-doped Tm3+ ion can offer an appropriate sensitization and deactivation effect for Er3+ ion at the same time in PbF2 crystal under the pump of conventional 800 nm laser diodes (LDs). With the introduction of Tm3+ ion into the Er3+: PbF2 crystal, the Er/Tm: PbF2 crystal exhibited an enhancing 2.78 μm mid-infrared (MIR) emission. Furthermore, the cyclic energy transfer mechanism that contains several energy transfer processes and cross-relaxation processes was proposed, which would well achieve the population inversion between the Er3+: 4I11/2 and Er3+: 4I13/2 levels. First-principles calculations were performed to find that good performance originates from the uniform distribution of Er3+ and Tm3+ ions in PbF2 crystal. This work will provide an avenue to design MIR laser materials with good performance.

Cross-Relaxation Processes in Nuclear Radiation Detected NMR

1979 ◽  
pp. 442-442
Author(s):  
F. Fujara ◽  
H. Ackermann ◽  
W. Buttler ◽  
K. Doerr ◽  
D. Dubbers ◽  
...  
Keyword(s):  
Cross Relaxation ◽  
Nuclear Radiation ◽  
Relaxation Processes
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