Studies of third-order nonlinear optical susceptibility and the metal—insulator phase transition of α-[BEDT-TTF]2I3 via femtosecond four-wave mixing

1992 ◽  
Vol 196 (3-4) ◽  
pp. 280-286 ◽  
Author(s):  
K.D. Trùòng ◽  
P. Grenier ◽  
D. Houde ◽  
A.D. Bandrauk
Keyword(s):  
Phase Transition ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
Metal Insulator ◽  
Optical Susceptibility ◽  
Insulator Phase Transition

Nonlinear Optical Properties of Rigid Rod Polymers and Model Compounds

1988 ◽  
Vol 134 ◽  
Author(s):  
Paras N. Prasad
Keyword(s):  
Nonlinear Optical ◽  
Wave Length ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Structural Variations ◽  
Model Compounds ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
Rigid Rod

ABSTRACTPicosecond and femtosecond degenerate four-wave mixing have been used to measure third-order nonlinear optical susceptibility of several rigid-rod polymers and model compounds. A significant X(3) with femtosecond response was observed. The effects of processing conditions and structural variations on X(3) were studied. Four-wave mixing studies can also be conveniently used to generate ultrasonic phonons of well defined wave length and propagation direction. From this result one can investigate mechanical properties of polymers. Using this technique both the longitudinal and shear components of the elastic moduli for a uniaxially oriented rigid-rod polymer, poly-p-phenylene bis benzooxazole (PBO), were determined.

Investigations of Nonlinear Optical Chromophores with Femtosecond Degenerate Four-Wave Mixing in Solutions

2003 ◽  
Vol 12 (02) ◽  
pp. 235-246 ◽  
Author(s):  
Anna Samoc ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Anke C. Freydank ◽  
Nigel T. Lucas
Keyword(s):  
Absorption Maximum ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Third Order ◽  
Conjugated Molecules ◽  
Time Resolved ◽  
Optical Susceptibility ◽  
Nonlinear Optical Chromophores ◽  
Optical Chromophores

Time-resolved DFWM experiments were performed with 150 fs pulses at 800 nm in chloroform solutions of π-conjugated molecules: p-bis(o-methylstyryl)-benzene (Bis-MSB) and a newly synthesized derivative of distyrylbenzene: an oligomer of p-phenylenevinylene substituted in the para position with electron donating alkyleneoxy group bearing the methacrylic group and an electron accepting 2-ethylhexylsulfonyl group (MTPV-SOHE monomer). The asymmetric substitution causes a red shift (24 nm) of the absorption maximum and enhancement of third-order optical susceptibility. The second hyperpolarizability derived from a quadratic dependence of the phase matched DFWM signal on concentration of MTPV-SOHE was about 6 times bigger than that in Bis-MSB.

Anisotropy in Third-Order Nonlinear Optical Susceptibility of the Stretch-Oriented Chrysophenine-Doped Poly(vinyl alcohol) Films

2013 ◽  
Vol 634-638 ◽  
pp. 2432-2435
Author(s):  
Zhao Hui Jin ◽  
Hua Jing Gao
Keyword(s):  
Vinyl Alcohol ◽  
Nonlinear Optical ◽  
Poly Vinyl Alcohol ◽  
Anisotropy Ratio ◽  
Wave Mixing ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
High Anisotropy ◽  
Very High

Stretch-oriented chrysophenine-doped poly(vinyl alcohol) (PVA) films were prepared at temperatures above the glass transition temperature of PVA. The optical absorption spectra of the stretch-oriented films exhibited a very high anisotropy (anisotropy ratio = 13). The third-order nonlinear optical properties of chrysophenine in stretch-oriented PVA films were measured by the resonant femtosecond degenerate four-wave mixing (DFWM) technique. The anisotropy ratio of the DFWM signal intensity was greater than 1000. The value of third-order nonlinear optical susceptibility of a uniaxially stretch-oriented chrysophenine-doped PVA film was 6.9×10-13 esu.

Theoretical and Experimental Studies of Third-Order Nonlinear Optical Susceptibilities of New p-N,N'-Diamethylaniline Tetrathiafulvalene Derivatives

2000 ◽  
Vol 660 ◽  
Author(s):  
B. Sahraoui ◽  
K.J. Pluciński ◽  
M. Makowaska-Janusik ◽  
I. V. Kityk ◽  
M. Salle ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Nonlinear Optical ◽  
Experimental Studies ◽  
Physical Nature ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Electronic Contribution ◽  
Optical Nonlinearities ◽  
Third Order

ABSTRACTA study was made of third-order nonlinear optical susceptibilities of new tetrathiafulvalene (TTF) derivatives, using the degenerate four wave mixing (DFWM) method, as well as complex quantum chemical calculations. To understand the physical nature of the optical nonlinearities, we separated their electronic and nuclear contributions. We found that the electronic contribution to these nonlinearities predominated. Our investigations suggest that TTF may be a highly promising material for nonlinear optics (NLO).

scholarly journals Third-order nonlinear optical susceptibility of crystalline oxide yttria-stabilized zirconia

2020 ◽  
Vol 8 (2) ◽  
pp. 110 ◽  
Author(s):  
Guillaume Marcaud ◽  
Samuel Serna ◽  
Karamanis Panaghiotis ◽  
Carlos Alonso-Ramos ◽  
Xavier Le Roux ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
Crystalline Oxide
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