Organometallic Complexes for Nonlinear Optics. 33.1Electrochemical Switching of the Third-Order Nonlinearity Observed by Simultaneous Femtosecond Degenerate Four-Wave Mixing and Pump−Probe Measurements

2003 ◽  
Vol 107 (51) ◽  
pp. 11264-11266 ◽  
Author(s):  
Clem E. Powell ◽  
Mark G. Humphrey ◽  
Marie P. Cifuentes ◽  
Joseph P. Morrall ◽  
Marek Samoc ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Four Wave Mixing ◽  
Organometallic Complexes ◽  
Wave Mixing ◽  
Third Order ◽  
Pump Probe ◽  
The Third ◽  
Third Order Nonlinearity ◽  
Degenerate Four Wave Mixing ◽  
Probe Measurements

Two-Photon Absorption and Degenerate Four-Wave Mixing Studies of Sulfide Semiconductor Nanoparticles in Polymeric Solutions

2008 ◽  
Vol 8 (3) ◽  
pp. 1364-1370 ◽  
Author(s):  
Wenling Jia ◽  
Fengqi Guo ◽  
Elliot P. Douglas ◽  
Wenfang Sun
Keyword(s):  
Four Wave Mixing ◽  
Semiconductor Nanoparticles ◽  
Photon Absorption ◽  
Wave Mixing ◽  
Absorption Coefficients ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon ◽  
The Third ◽  
Degenerate Four Wave Mixing

The two-photon absorption coefficients (β) and the third-order nonlinear susceptibilities (χ(3)) of several semiconductor nanoparticles (CdS, CdxAg1–xS, and core–shell CdS/Ag2S) that are confined and stabilized by random and block ionomers have been measured by nonlinear transmission and degenerate four-wave mixing techniques using 21 picosecond laser pulses at near-infrared spectral region. The imaginary part of the third-order nonlinear susceptibility that is related to the two-photon absorption coefficient was then calculated. The absorptive nonlinearity of the nanoparticles (2∼9 nm) was found to be dependent on the particle size, composition and wavelength, i.e., larger CdS particles exhibit higher two-photon absorption coefficients and the presence of Ag improves two-photon absorption of CdS nanoparticles. The obtained two-photon absorption coefficients of nanoparticles corrected for their volume fraction in solution are significantly greater that those of corresponding bulk semiconductors.

Enhanced Third Order Optical Nonlinear Response in Polythiophene Films—Polaron Contributions

1989 ◽  
Vol 173 ◽  
Author(s):  
Lina Yang ◽  
R. Dorsinville ◽  
R. Zamboni ◽  
C. Taliani ◽  
R. Tubino ◽  
...  
Keyword(s):  
Nonlinear Response ◽  
Four Wave Mixing ◽  
Nonlinear Susceptibility ◽  
Wave Mixing ◽  
Third Order ◽  
Pump Probe ◽  
Order Of Magnitude ◽  
Degenerate Four Wave Mixing ◽  
Thiophene Based Polymers ◽  
Third Order Nonlinear Susceptibility

ABSTRACTThe enhancement of the third order nonlinear susceptibility χ(3)) of an homologous series of polycondensed thiophene based polymers was observed about photoinduced polaronic bands by a novel “pump-probe” degenerate four wave mixing echnique. Enhancement of the degenerate four wave mixing signal for more than an order of magnitude was achieved with response time of less than 25 ps. The intrachain polarons contribution is proposed as the possible mechanism responsible for the observed enhancement.

scholarly journals Synthesis, polymerization ability, nonlinear optical properties of methacrylic monomers and polymers with benzylidene moiety

2007 ◽  
Vol 1 (3) ◽  
pp. 131-135
Author(s):  
Vitaliy Smokal ◽  
◽  
Oksana Krupka ◽  
Aleksey Kolendo ◽  
Beata Derkowska ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Nonlinear Optical Properties ◽  
Wave Mixing ◽  
Third Order ◽  
The Third ◽  
Methacrylic Monomers ◽  
Degenerate Four Wave Mixing ◽  
532 Nm

New methacrylic monomers, their polymers with benzylidene fragment were synthesized. Structures of all compounds were determined by HNMR, UV- spectroscopies. The third order nonlinear optical properties of oxazolone, thiazolidinone and thiohydantoin containing compounds were investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.

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