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Third-Order Nonlinear Optical Properties and Reverse Saturable Absorption in 2,3-Butanedione Dihydrazone Using z-Scan Technique

100%

Singh V., Aghamkar P., Lal B.

Acta Physica Polonica A

2013

vol. 123

issue 1

39-44

Using chemical route a 2,3-butanedione dihydrazone (BDDH) compound was prepared. The third-order nonlinear optical properties of BDDH were investigated by using single beam z-scan technique with Q-switched, frequency doubled Nd:YAG laser (λ = 532 nm) at 5 ns pulse. Effect of excitation intensity on nonlinear optical properties has been studied and found that experimental and computed values are well in agreement. Also, we found the measured nonlinear optical coefficients are nearly ten times larger than the reported. The excited state absorption cross-section of BDDH was found to be larger than that of the ground state absorption cross-section, indicating the reverse saturable absorption.

Synthesis of Fe_4[Fe(CN)_6]_3·14H_2O Nanopowder by Co-Precipitation Technique and Effect of Heat Treatment

76%

Rohilla S., Lal B., Sunder S., Aghamkar P., Kumar S., Aggarwal A.

issue 4

696-700

Nanopowder of iron cyanide hydrate (member of Prussian blue family) was obtained using ferric chloride and potassium cyanide in their dilute solution through co-precipitation method. The effect of thermal annealing on iron cyanide hydrate nanocrystallites have been studied in detail. The formation of Fe_4[Fe(CN)_6]_3·14H_2O and iron oxides was revealed by the Fourier transform infrared spectroscopy. The crystal structure, morphology and size of nanocrystallites were investigated by X-ray diffraction and transmission electron microscope. Results suggest that using co-precipitation technique, nanopowder of iron cyanide hydrate, in typically spherical shape, can be obtained and their thermal treatment also yield iron oxide nanocrystallites of spherical with good homogeneity. The size of the prepared nanocrystallites was found in the range 20-36 nm. It was observed that thermal treatment, typically at 800°C (4 h), iron cyanide hydrate (Fe_4[Fe(CN)_6]_3·14H_2O) nanocrystallites transformed into iron oxide (α-Fe_2O_{3,} hematite) nanocrystallites.

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2 Acta Physica Polonica A

1 2013

1 2010

2 Aghamkar P.

2 Lal B.

1 Aggarwal A.

1 Kumar S.

1 Rohilla S.

1 Singh V.

1 Sunder S.

Search results

Third-Order Nonlinear Optical Properties and Reverse Saturable Absorption in 2,3-Butanedione Dihydrazone Using z-Scan Technique

Synthesis of Fe_4[Fe(CN)_6]_3·14H_2O Nanopowder by Co-Precipitation Technique and Effect of Heat Treatment