Determination of the triplet excited-state absorption cross section in a polyfluorene by energy transfer from a phosphorescent metal complex

2007 ◽  
Vol 76 (24) ◽  
Author(s):  
Chang-Lyoul Lee ◽  
Xudong Yang ◽  
Neil C. Greenham
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Metal Complex ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Excited State Absorption ◽  
Absorption Cross ◽  
Triplet Excited State

Investigations of Non-Linear Absorption of Q-Switching Saturable Absorbers and Determination of their Main Parameters

2015 ◽  
Vol 230 ◽  
pp. 193-198
Author(s):  
Jaroslaw Mlynczak ◽  
Krzysztof Kopczynski ◽  
Nabil Belghachem
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Excited State Absorption ◽  
Absorption Cross ◽  
Ground State Absorption ◽  
Linear Absorption ◽  
Saturable Absorbers ◽  
Q Switching ◽  
Non Linear

Investigations of non-linear absorption of q-switching absorbers were carried out. Three types of saturable absorbers were examined (Cr4+:YAG at the wavelength of 1064 nm, V3+:YAG and Co2+:YAG at the wavelength of 1332 nm) and their principal parameters were estimated. To appropriately determine these parameters 48 samples of Cr4+:YAG, 42 samples of V3+:YAG and 26 samples of Co2+:YAG were investigated making the results more reliable. Three different models of analysis of saturation effect were described and the best one chosen. Using the best model for the analysis the main parameters of the saturable absorbers were determined. On the basis of so many samples the standard deviation of the ground state absorption cross section, the excited state absorption cross section and the unsaturable losses were calculated showing how the value of these parameters may differ even for the same type of crystal.

Excited-state absorption cross-section of C60

1994 ◽  
Author(s):  
Nansheng Tang ◽  
H. Guan ◽  
Jouni P. Partanen ◽  
Robert W. Hellwarth
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Excited State Absorption ◽  
Absorption Cross
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