Third-order optical nonlinearity of DSR13/THF solutions under CW He–Ne laser irradiation using Z-scan method

2021 ◽  
pp. 1-7
Author(s):  
Bassam Abbas ◽  
Mohammad Alshikh Khalil
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
The Third ◽  
Order Susceptibility

The Z-scan technique was employed to explore the third-order nonlinear optical properties of disperse red 13 organic chromophore solutions in tetrahydrofuran. A continuous-wave He–Ne laser (632.8 nm) was used as a source of irradiation. The nonlinear absorption and nonlinear refractive index coefficients of this dye were investigated. The results showed that this dye has a good nonlinear response with its real and imaginary quantities of third-order susceptibility. The solutions showed negative nonlinear refraction. The best obtained value of the third-order susceptibility was 6.37 × 10–3 esu at a dye concentration of 3.15 × 10–4 mol/L. Moreover, the nonlinear optical properties were enhanced with higher dye concentrations, and an elevated trend in nonlinear absorption and nonlinear refractive index coefficients was observed. Also, it was found that the reverse saturable absorption was the main mechanism responsible for the two-photon absorption effect in DSR13/THF samples.

Study of the third order nonlinear optical properties of Zn1−xMgxSe and Cd1−xMgxSe crystals

2008 ◽  
Vol 16 (1) ◽  
Author(s):  
B. Derkowska ◽  
F. Firszt ◽  
B. Sahraoui ◽  
A. Marasek ◽  
M. Kujawa
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Energy Gap ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Optical Susceptibility ◽  
Mg Content

AbstractThird order nonlinear optical susceptibilities χ<3> of ternary Zn1−xMgxSe and Cd1−xMgxSe crystals have been measured using standard degenerate four-wave mixing (DFWM) method at 532 nm. The nonlinear transmission technique has been applied to check if our crystals exhibit two-photon absorption. The studied Zn1−xMgxSe and Cd1−xMgxSe solid solutions were grown from the melt by the modified high-pressure Bridgman method. For both crystals the energy gap increases with increasing Mg content.In the case of Zn1−xMgxSe, it was found that the value of third order nonlinear optical susceptibility χ<3> decreases with increasing Mg content. An explanation of this behaviour results from the dependence of optical nonlinearities on the energy band gap Eg of the studied crystals. In the case of Cd1txMgxSe with low content of Mg, no response was observed for the studied wavelength since the energy gap in such crystals is smaller than the photon energy of the used laser radiation.It was also found that the value of third order nonlinear optical susceptibility χ<3> for Cd0.70Mg0.30Se is higher than for Zn0.67Mg0.33Se. This behaviour can be understood if one take into consideration that the free carrier concentration in Cd1−xMgxSe samples is about four orders of magnitude higher than that in Zn1txMgxSe ones with comparable Mg content respectively. It is commonly known that when the electric conductivity increases, the values of nonlinear optical properties increase.From the performed measurements one can conclude that the incorporation of Mg as constituent into ZnSe and CdSe crystals leads to a change of the third order nonlinear optical susceptibilities.

Z-SCAN DETERMINATION OF THE THIRD-ORDER OPTICAL NONLINEARITY OF ORGANIC DYE NILE BLUE CHLORIDE

2006 ◽  
Vol 20 (11) ◽  
pp. 623-632 ◽  
Author(s):  
QUSAY MOHAMMED ALI ◽  
P. K. PALANISAMY
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Nile Blue ◽  
Optical Nonlinearity ◽  
Organic Dye ◽  
Photon Absorption ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third

The single beam Z-scan technique was used to determine the nonlinear optical properties of the organic dye Nile Blue chloride in the solvent ethanol. The experiments were performed with a He-Ne laser with a wavelength of 632.8 nm. The negative nonlinear refractive index and two-photon absorption coefficient were observed in this dye. The intensity-dependent nonlinear refractive index was investigated. The result shows that the dye exhibits a great nonlinear response with the real and imaginary parts of the third-order nonlinear optical susceptibility χ(3) being -4.12×10-5 esu and 1.35×10-6 esu, respectively. These results show that the Nile Blue chloride dye has potential applications in nonlinear optics.

Synthesis, Characterization and Investigation of the Third Order Nonlinear Optical Properties of Pyrrole Schiff Bases

2012 ◽  
Vol 488-489 ◽  
pp. 377-382
Author(s):  
Sivan Velmathi ◽  
Vijayaraghavan Reena
Keyword(s):  
Optical Properties ◽  
Schiff Bases ◽  
Nonlinear Optical ◽  
Optical Power ◽  
Nonlinear Optical Properties ◽  
Optical Measurements ◽  
Photon Absorption ◽  
Third Order ◽  
The Third ◽  
Non Linear

We have investigated the third order nonlinear optical properties of pyrrole Schiff bases synthesized by condensing pyrrole-2-carboxaldehyde with two different diamines. The nonlinear optical measurements were performed using the nano- second laser pulses at 532nm wavelengthby employing the Z-scan technique. The Z- scan spectra reveal a large negative non-linear refraction co-efficient .The nonlinear refractive index was found to be of the order of 10-14cm2/W and the magnitude of third order susceptibility was of the order of 10-13esu. These compounds exhibit good optical power limiting property under nano-second regime and TPA (Two Photon Absorption) is the dominating process leading to the non-linear behavior.

Two-dimensional two-photon absorptions and third-order nonlinear optical properties of Ih fullerenes and fullerene onions

2020 ◽  
Vol 22 (25) ◽  
pp. 14225-14235
Author(s):  
Xue-Lian Zheng ◽  
Ling Yang ◽  
Bo Shang ◽  
Ming-Qian Wang ◽  
Yingli Niu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Phase Modulation ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Two Dimensional ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon ◽  
The Third

The third order nonlinear optical properties of Ih symmetry fullerenes increase exponentially with fullerene size. The two-dimensional two-photon absorption spectra for C60 and C240 have strong self-phase modulation responses.

Physical origin of the third-order nonlinear optical properties of polyenes

2005 ◽  
Vol 52 (14) ◽  
pp. 1933-1945 ◽  
Author(s):  
I. Fuks-Janczarek ◽  
I. V. Kityk * ◽  
J. Berdowski ◽  
B. Sahraoui ◽  
C. Andraud
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Physical Origin ◽  
Third Order ◽  
The Third

Theoretical aspects on the evaluation and interpretation of the third-order nonlinear optical properties of diradical compounds

2012 ◽  
Author(s):  
Benoı̂t Champagne ◽  
Edith Botek ◽  
Akihiro Shimizu ◽  
Takashi Kubo ◽  
Kenji Kamada ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
The Third

Investigation of the third-order nonlinear optical properties in porphyrin solutions in the picosecond regime

2015 ◽  
Vol 24 (03) ◽  
pp. 1550030 ◽  
Author(s):  
M. Chniti ◽  
C. Cassagne ◽  
J. L. Godet ◽  
G. Boudebs
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Time Dependence ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Spectral Width ◽  
Incident Laser ◽  
Third Order ◽  
The Third ◽  
532 Nm

The D4σ-Z-scan technique is used to evaluate the sign and the magnitude of the nonlinear (NL) refractive index and the NL absorption (NLA) coefficient with a laser delivering single pulses in the picosecond regime at 355 nm, 532 nm and 1064 nm. The NL optical response of the zinc porphyrins (Pph) has been found to be significantly enhanced. The study of the NLA and refraction is performed, taking into account the time dependence and the spectral width of the incident laser. The variations of the NL coefficients as a function of the intensity and the concentration are provided and are found to be linear.

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