The photophysics and two-photon absorption of a series of quadrupolar and tribranched molecules: The role of the edge substituent

2009 ◽  
Vol 81 (1) ◽  
pp. 63-68 ◽  
Author(s):  
M. Fakis ◽  
I. Fitilis ◽  
S. Stefanatos ◽  
P. Vellis ◽  
J. Mikroyannidis ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

OPTICAL LIMITING STUDIES IN PHOTOREFRACTIVE PURE AND IRON-DOPED Bi12SiO20 CRYSTALS

2000 ◽  
Vol 09 (02) ◽  
pp. 217-225 ◽  
Author(s):  
P. SREERAMANA AITHAL ◽  
P. PREM KIRAN ◽  
D. NARAYANA RAO
Keyword(s):  
Excited State Absorption ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Limiting Behavior ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Iron Incorporation ◽  
Optical Limiter ◽  
Level Model

Optical limiting characteristics of pure and 150 ppm Fe-doped Bi 12 SiO 20 (BSO:Fe) crystals are studied at high intensity nanosecond pulse regime. When the input light is at 532 nm and at 595 nm with 6 ns pulse duration, a good optical limiting behavior is observed due to simultaneous effect of trap assisted excited state absorption and two photon absorption. The precise role of the internal defects due to impurity centers present in the crystal lattice is explained on the basis of a four level model. This study reveal that the increased nonlinear absorption due to iron incorporation in BSO makes it an excellent passive optical limiter.

One- and Two-Photon Absorption in CdS Nanodots and Wires: The Role of Dimensionality in the One- and Two-Photon Luminescence Excitation Spectrum

2014 ◽  
Vol 119 (2) ◽  
pp. 1260-1267 ◽  
Author(s):  
Alexander W. Achtstein ◽  
Ana Ballester ◽  
Jose L. Movilla ◽  
Jonas Hennig ◽  
Juan I. Climente ◽  
...  
Keyword(s):  
Excitation Spectrum ◽  
Luminescence Excitation Spectrum ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
The One

A two-photon absorption study of fluorene and carbazole derivatives. The role of the central core and the solvent polarity

2007 ◽  
Vol 447 (4-6) ◽  
pp. 300-304 ◽  
Author(s):  
I. Fitilis ◽  
M. Fakis ◽  
I. Polyzos ◽  
V. Giannetas ◽  
P. Persephonis ◽  
...  
Keyword(s):  
Solvent Polarity ◽  
Central Core ◽  
Photon Absorption ◽  
Absorption Study ◽  
Two Photon Absorption ◽  
Carbazole Derivatives ◽  
Two Photon
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