Laser-excitation of electrons and nonequilibrium energy transfer to phonons in copper

2017 ◽  
Vol 417 ◽  
pp. 64-68 ◽  
Author(s):  
S.T. Weber ◽  
B. Rethfeld
Keyword(s):  
Energy Transfer ◽  
Laser Excitation ◽  
Nonequilibrium Energy

Enhanced green upconversion emission of Er^3+ through energy transfer by Dy^3+ under 800 nm femtosecond-laser excitation

2008 ◽  
Vol 33 (7) ◽  
pp. 693 ◽  
Author(s):  
Ai-Hua Li ◽  
Qiang Lü ◽  
Zhi-Ren Zheng ◽  
Liang Sun ◽  
Wen-Zhi Wu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Femtosecond Laser ◽  
Laser Excitation ◽  
Upconversion Emission

A Study of Measurement Interference in the Optoacoustic Detection of NO2 by Argon-Ion Laser Excitation

1982 ◽  
Vol 36 (5) ◽  
pp. 562-565 ◽  
Author(s):  
Alan Fried
Keyword(s):  
Energy Transfer ◽  
Laser Excitation ◽  
Dramatic Decrease ◽  
Argon Ion Laser ◽  
Ion Laser ◽  
Argon Ion

Optoacoustic measurements of NO2 excited by an Ar+ laser were performed in the presence of NO, N2, H2O, and O2 matrix gases. Identical sensitivities were measured in all matrix gases except O2 where energy transfer from NO2 to the metastable O2(1Δg) state resulted in a dramatic decrease in sensitivity.

A BOXCARS investigation of the V–V energy transfer from highly excited SF6 to CS2 and the sensitized photodissociation of CS2

1994 ◽  
Vol 72 (11-12) ◽  
pp. 845-850 ◽  
Author(s):  
L. Wang ◽  
W. E. Jones
Keyword(s):  
Energy Transfer ◽  
Partial Pressure ◽  
Energy Exchange ◽  
Laser Excitation ◽  
Vibrational Energy ◽  
Vibrational Temperature ◽  
Excitation Intensity ◽  
Excitation Energies ◽  
Ir Laser ◽  
Partial Pressures

The BOXCARS technique was used to investigate the vibrational energy transfer between highly excited SF6 and CS2, and for the sensitized photodissociation of CS2. The analysis of data, as reported in our previous studies, to extract vibrational temperature from the CARS signal has been revised in the present work to adjust for the fact that the ground-state population may not be constant. The current investigation suggests that IR laser excitation of SF6 and the energy exchange between excited SF6 and CS2 create a high-lying vibrational energy reservoir in the CS2 vibrational manifold. The rate of energy transfer depends on the partial pressures of SF6 and CS2, and the excitation intensity. The transfer rate shows greater dependence on the partial pressure of SF6 than on the partial pressure of CS2. At higher excitation energies, the energy reservoir leads to photofragmentation products.

scholarly journals Tunable Upconversion Luminescence and Energy Transfer Process in BaLa2ZnO5:Er3+/Yb3+Phosphors

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Lefu Mei ◽  
Jing Xie ◽  
Libing Liao ◽  
Ming Guan ◽  
Haikun Liu
Keyword(s):  
Energy Transfer ◽  
Transfer Process ◽  
Laser Excitation ◽  
Energy Transfer Process ◽  
Upconversion Luminescence ◽  
Solid State Method ◽  
Characteristic Energy ◽  
Photon Process ◽  
State Method ◽  
Power Studies

BaLa2ZnO5:Er3+/Yb3+has been synthesized via a high temperature solid-state method, and the tunable upconversion luminescence and energy transfer process between Yb3+and Er3+in this system have been demonstrated. Upon 980 nm laser excitation, the intense green and red emission around 527, 553, and 664 nm were observed for BaLa2ZnO5:Er3+/Yb3+, which can be assigned to the characteristic energy level transitions of2H11/2→4I15/2,4S3/2→4I15/2, and4F9/2→4I15/2of Er3+, respectively. The critical Er3+quenching concentration (QC) was determined to be about 5 mol%, and the power studies indicated that mixture of 2- and 3-photon process was responsible for the green and red upconversion luminescence.

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