Study of Two-Photon Absorption Spectral Property of a Novel Nonlinear Optical Chromophore Using Femtosecond Continuum

2002 ◽  
Vol 106 (43) ◽  
pp. 11081-11084 ◽  
Author(s):  
Guang S. He ◽  
Tzu-Chau Lin ◽  
Paras N. Prasad ◽  
Ramamurthi Kannan ◽  
Richard A. Vaia ◽  
...  
Keyword(s):  
Spectral Property ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Nonlinear Optical Chromophore

scholarly journals Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1670
Author(s):  
Jan K. Zaręba ◽  
Marcin Nyk ◽  
Marek Samoć
Keyword(s):  
Solid State ◽  
Conjugated Polymers ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
Model Compounds ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Sensing Applications ◽  
Spectrally Resolved ◽  
The Impact

Nonlinear optical (NLO) pigments are compounds insoluble in solvents that exhibit phenomena related to nonlinear optical susceptibilities (χ(n) where n = 2,3,...), e.g., two-photon absorption (2PA) which is related to the imaginary part of χ(3). Determination of spectrally-resolved 2PA properties for NLO pigments of macromolecular nature, such as coordination polymers or crosslinked polymers, has long been a challenging issue due to their particulate form, precluding characterizations with standard techniques such as Z-scan. In this contribution, we investigate thus far unknown spectrally-resolved 2PA properties of a new subclass of NLO pigments—crosslinked conjugated polymers. The studied compounds are built up from electron-donating (triphenylamine) and electron-withdrawing (2,2’-bipyridine) structural fragments joined by vinylene (Pol1) or vinyl(4-ethynylphenyl) (Pol2) aromatic bridges. 2PA properties of these polymers have been characterized in broad spectral range by specially modified two-photon excited fluorescence (TPEF) techniques: solid state TPEF (SSTPEF) and internal standard TPEF (ISTPEF). The impact of self-aggregation of aromatic backbones on the 2PA properties of the polymers has been evaluated through extended comparisons of NLO parameters, i.e., 2PA cross sections (σ2) and molar-mass normalized 2PA merit factors (σ2/M) with those of small-molecular model compounds: Mod1 and Mod2. By doing this, we found that the 2PA response of Pol1 and Pol2 is improved 2–3 times versus respective model compounds in the solid state form. Further comparisons with 2PA results collected for diluted solutions of Mod1 and Mod2 supports the notion that self-aggregated structure contributes to the observed enhancement of 2PA response. On the other hand, it is clear that Pol1 and Pol2 suffer from aggregation-caused quenching phenomenon, well reflected in time-resolved fluorescence properties as well as in relatively low values of quantum yield of fluorescence. Accordingly, despite improved intrinsic 2PA response, the effective intensity of two-photon excited emission for Pol1 and Pol2 is slightly lower relative to Mod1 and Mod2. Finally, we explore temperature-resolved luminescence properties under one- (377 nm), two- (820 nm), and three-photon excitation (1020 nm) conditions of postsynthetically Eu3+-functionalized material, Pol1-Eu, and discuss its suitability for temperature sensing applications.

Third-order nonlinear optical properties and two-photon absorption in branched oligothienylenevinylenes

2002 ◽  
Vol 209 (4-6) ◽  
pp. 461-466 ◽  
Author(s):  
I. Fuks-Janczarek ◽  
J-M. Nunzi ◽  
B. Sahraoui ◽  
I.V. Kityk ◽  
J. Berdowski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon

Two-photon absorption and nonlinear optical properties of a new organic dye PSPI

2001 ◽  
Vol 190 (1-6) ◽  
pp. 345-349 ◽  
Author(s):  
Guangyong Zhou ◽  
Xiaomei Wang ◽  
Dong Wang ◽  
Chun Wang ◽  
Zongshu Shao ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Organic Dye ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon
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