Solvent effect on the third-order nonlinearity and optical limiting ability of a stilbazolium-like dye

2000 ◽  
Author(s):  
Wenfang Sun ◽  
Michael M. McKerns ◽  
Christopher M. Lawson ◽  
Gary M. Gray ◽  
Chuan-Lang Zhan ◽  
...  
Keyword(s):  
Solvent Effect ◽  
Optical Limiting ◽  
Third Order ◽  
The Third ◽  
Third Order Nonlinearity

Optical limiting properties of BODIPY dyes substituted with styryl or vinylene groups on the nanosecond timescale

2019 ◽  
Vol 23 (07n08) ◽  
pp. 701-717 ◽  
Author(s):  
Nobuhle Ndebele ◽  
Zweli Hlatshwayo ◽  
Bokolombe P. Ngoy ◽  
Gugu Kubheka ◽  
John Mack ◽  
...  
Keyword(s):  
Thin Films ◽  
Absorption Coefficient ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Nanosecond Laser ◽  
Third Order ◽  
The Third ◽  
Nanosecond Laser Pulses ◽  
532 Nm ◽  
Order Susceptibility

The results of recent studies on the optical limiting properties of BODIPY dyes at 532 and 1064 nm are described and compared. The optical limiting properties of novel 1,7-dimethyl-3,5-di-4-dihydroxyborylstyryl- and 3,5,7-tristyryl-1-methyl-BODIPY dyes were studied in CH2Cl2 and C6H6 and polystyrene thin films using the open aperture Z-scan technique at 532 nm with nanosecond laser pulses to provide an example of how the effective nonlinear absorption coefficient, the third order susceptibility, hyperpolarizability and limiting thresholds can be calculated.

Real and imaginary components of the third-order nonlinearity of polyaniline dodecylbenzenesulfonic salt

1995 ◽  
Vol 20 (24) ◽  
pp. 2478 ◽  
Author(s):  
M. Samoc ◽  
A. Samoc ◽  
B. Luther-Davies ◽  
J. Swiatkiewicz ◽  
C. Q. Jin ◽  
...  
Keyword(s):  
Third Order ◽  
The Third ◽  
Third Order Nonlinearity

COMPARATIVE STUDIES ON THE THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF THREE METAL-ORGANIC COMPOUNDS

2011 ◽  
Vol 20 (02) ◽  
pp. 229-236 ◽  
Author(s):  
PENGFEI ZHANG
Keyword(s):  
Near Infrared ◽  
Heavy Atom ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Infrared Region ◽  
Photon Absorption ◽  
Third Order ◽  
The Third ◽  
Planar Transition

The third-order optical nonlinearities of three planar transition metal ( Ni, Cu and Pd ) compounds with rigid quadridentate Schiff base derived from S-benzyl dithiocarbazate, were investigated systematically by Z-scan technique with picosecond laser pulses at 1064 nm. The three compounds exhibit both strong two-photon absorption and effective self-focusing performance. Due to the heavy atom effect, the second hyperpolarizability of PdZ molecule (〈γ〉 = 1.2 × 10-29 esu) was found to be the highest compared to that of the other two molecules. The optical limiting properties were also measured, and the results suggest that PdZ may be a promising candidate for the application to optical limiting in the near-infrared region.

scholarly journals MEASUREMENT OF NONLINEAR RESPONSES AND OPTICAL LIMITING BEHAVIOR OF TIO2/PS NANO-COMPOSITE BY SINGLE BEAM TECHNIQUE WITH DIFFERENT INCIDENT INTENSITIES

2012 ◽  
Vol 05 ◽  
pp. 277-283 ◽  
Author(s):  
M. H. MAJLES ARA ◽  
Z. DEHGHANI
Keyword(s):  
Refractive Index ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Optical Limiting ◽  
Nonlinear Absorption Coefficient ◽  
Third Order ◽  
Nano Composite ◽  
Single Beam ◽  
The Third

Titanium dioxide (titania) is a cheap, nontoxic and highly efficient photocatalyst being extensively applied for the degradation of organic pollutants, air purification, water splitting, reduction of nitrogen to ammonia, and optical devices due to its optical behaviors. The third-order nonlinear optical properties of TiO 2/ PS nano-composite were studied by means of single beam transmission technique, using a continuous-wave (CW) He - Ne laser beam with a wavelength of 632.8 nm with three different incident intensities. The magnitude and sign of the third-order nonlinear refractive index ( n 2) and nonlinear absorption (β) of TiO 2/ PS nano-composite were determined by use of both the closed-aperture and opened-aperture z -scan techniques. Z -scan technique, developed by Sheik-Bahae et al., has been used widely in material characterization. A single-beam (also called z -scan method) for measuring the sign and magnitude of nonlinear refraction that has simplicity and very high sensitivity has been reported recently. Optical limiting property of TiO 2/ PS nano-composite is studied. The positive sign obtained for nonlinear refractive index indicated that there is a self-focusing effect in the sample. The nonlinear refractive index was in order of 10-8 (cm2/W) and the nonlinear absorption coefficient was obtained in order of 10-2 (cm/W) with negative sign. The values of nonlinear refractive index and nonlinear absorption coefficient are enhanced by decreasing the intensity.

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