Optical Nonlinear Proreties and Optical Limiting Effect of Metanil Yellow

Abstract

Problem statement: The third order nonlinear optical properties of organic polymers are used in high speed telecommunication, optical limiters and optical computers. The purpose of the study was to determine the third order nonlinear characteristics and optical limiting effect of the organic dye, metanil yellow in liquid and solid medium. Approach: The samples were prepared by dissolving the dye in acetonitrile (liquid medium) at different concentration and thin film was prepared by bulk polymerization method. The nonlinear optical responses of the samples were studied by using single-beam Z-scan technique. The optical limiting effects of the samples were studied by using a CW, Nd: YAG laser at 532 nm. Results: The open aperture Z-scan of the solution and solid samples displayed reversible saturable absorption. The closed aperture Z-scan of the samples exhibited negative nonlinearity, which was larger in magnitude in solid film compared to that in solution. The third order nonlinear susceptibility was found to be 2.00 and 2.34×10^-6 (e.s.u) for the dye in solution and film at 0.05 mM concentration. The saturated output power for the dye in solution and film was found to be 1.2 and 0.8 mW respectively at 1.0 mM concentration. Conclusion: The dye doped in polymer can be utilized in optical limiting, low-power degenerate four wave mixing, data storage and grating applications

Single beam Z-scan measurement of the third order optical nonlinearities of styryl7 dye

“…The spectral absorption peak wavelength ( a ) was calculated to be 575 nm. The spectral parameters such as molar extinction co efficient ε( ) = 5.5 × 10 4 L mol −1 cm −1 , oscillator strength (f) = 2.02 × 10 −24 L mol −1 cm −2 and band width( 1/2 ) = 8.5 × 10 3 cm −1 were calculated at 575 nm [8].…”

Z-scan and optical limiting properties of Hibiscus Sabdariffa dye

“…The seedpods are enclosed in red fleshy calyces, which are commonly used for making food and tea as well as for several bio and phytochemicals applications in relation to its antioxidant properties [7][8][9]. The calyx of Hibiscus sabdariffa L. (Roselle) is originally of a deep red color.…”

Large optical nonlinearities in copolymers with new pendant azobenzene moieties

“…Such polymers bearing suitable azobenzene moieties are well known for their induced nonlinear optical properties [1][2][3], due to their cis -trans clean photochemistry. Most azobenzenes can be optically isomerized from trans to cis with light, anywhere within the broad absorption band; and the molecule will subsequently thermally relax back into the trans state on a timescale dictated by the substitution pattern.…”