The study of nonlinear optical properties of aqueous acid fuchsin dye and its optical power limiting using Z-Scan method

• Published in: Optical materials Vol. 112; p. 110540
• Main Authors: Awalludin, Afiq, Syuhada, Aneez, Rosli, Muhammad Izz, Abdullah, Mundzir, Duralim, Maisarah, Abd Aziz, Muhammad Safwan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2021
• Subjects: Nonlinear optics; Optical power limiting; Triarylmethane dyes; Z-scan technique; Z-scan technique; Optical power limiting; Triarylmethane dyes; Nonlinear optics
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2020.110540

In this research effort, the nonlinear refraction (NLR) and nonlinear absorption (NLA) of Acid Fuchsin dye solution were measured using Z-scan technique. Both properties were measured through the application of open aperture and closed aperture Z-Scan measurements in order to analyse the relationship between different laser input fluences and on four different dye concentrations (0.03 mM, 0.05 mM, 0.10 mM, and 0.20 mM). The results showed that both; NLR, NLA and optical limiting properties were observed starting from 0.05 mM. There is a reduction in terms of its NLR value observed as the concentrations increased with 0.03 mM has the highest value of n2. It is shown that the increment of NLA value is also observed as the concentrations increased. The low optical limiting (OL) threshold is observed around 0.04 W under continuous wave (CW) 532 nm laser beam. This shows that acid fuchsin dye has the capability as an optical limiter in photonics applications. •The nonlinear absorption (NLA) of the solution shows reverse saturable absorption (RSA).•Self-defocusing effects was observed based on the negative nonlinear refraction (NLR) shown.•The increase in aggregation of the dye's molecules has an important role in both nonlinear properties.•Aqueous Acid Fuchsin of 0.20 mM concentration has the lowest optical limiting threshold at P = 0.04 W.