Investigating the optical nonlinear properties and limiting optical of eosin methylene blue solution using a cw laser beam

Abstract

Diffraction patterns and Z-scan methods are used to measure the nonlinear refractive index, NRI, of the eosin methylene blue in the solvent ethanol using a continuous wave laser beam of 473 nm wavelength. Experimental results of the former and latter methods showed the appearance of rings and the self-defocusing SDF effect respectively, and these results may be due to phase modulation. It is demonstrated that the eosin methylene blue solution have a high NRI. Also the limiting optical properties of the sample are investigated. It is observed that the sample has the optical limiter properties OLPs. It is proved that the origin of the OLPs is thermal. The NRI and threshold limiting values of the eosin methylene blue solution are −1.1 × 10−8 cm2 W−1 and 12 mW, respectively. A thermal lens model and the Fresnel–Kirchhoff integral are used to calculate the self-defocusing and the diffraction ring patterns results respectively.

Giant nonlinear optical response of fullerene polymer fragments: a DFT perspective

“…These strategies include the utilization of molecules possessing extended π-electron systems [1,8], twisted π-electron systems [9], donor-πconjugated acceptor (D-π-A) models [10,11], and noncovalent charge transfer [12], among others. In addition, extensive investigations have also been conducted on diverse classes of materials such as inorganic materials [13], organic materials [14,15], and inorganic-organic hybrid materials [16,17] with the aim of identifying effective NLO candidates. Among these materials, organic compounds are considered particularly promising due to their abundant availability of functional groups, wide range of synthetic methodologies, and costeffectiveness [18].…”

A novel azo compound derived from ethyl-4-amino benzoate: synthesis, nonlinear optical properties and DFT investigations

“…The laser beam interaction with nonlinear materials leads to variety of effects in the transverse dimensions viz., self-focusing (SF) and defocusing (SDF), spatial ring formation, self-phase modulation, etc., [1][2][3][4][5][6][7][8][9][10][11]. Materials having high nonlinear optical (NLO) third-order properties and ultra-fast response time led to considerable scientific activities for their potential applications viz., optical computing, optical phase conjugation, all-optical switching (AOS), holography, spatial dark soliton transmission, optical power limiting, harmonic generation [12][13][14][15][16][17][18][19][20][21][22][23][24][25] etc.…”

Synthesis, DFT calculations and optical nonlinear properties of two derived Schiff base compounds from ethyl-4-amino benzoate

“…Based on the SPM and generally on the spatial self-phase modulation (SSPM) two types of interferences occur viz., destructive and constructive within the laser beam leads to a set of circular diffraction ring patterns (DRPs) depending on the laser beam power. SSPM has been extensively studied in different materials that suffer thermal-dependent changes in their index of refractions [12][13][14][15][16][17][18][19][20][21][22], liquid crystals [23], atomic vapors [24], photorefractive crystals [25], Kerr media [26], and nanosheet dispersion [27]. The number of rings per pattern generally depends on the nonlinear phase shift of the laser beam suffered during the passage through the nonlinear media.…”