Optical limiting behaviour of linear fused ring dichloro-substituent chalcone isomers

• Published in: Journal of physics. Conference series 2020-05, Vol.1535 (1), p.12034
• Main Authors: Abdullah, Mundzir, Zainuri, Dian Alwani, Arshad, Suhana, Razak, Ibrahim Abdul, Yann, Heng Han, Mohammad, Sabah M, Mohd Shazlan, Siti Nur'Adiilah
• Format: Article
• Language: English
• Subjects: Absorptivity; Constraining; Continuous wave lasers; Fluence; Isomers; Nonlinear response; Optoelectronics; Refractivity
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1535/1/012034

The third-order nonlinear optical response of halogen anthracenyl chalcone isomers in dimethyl sulphonate (DMSO) as the solvent has been studied. Single beam Z-scan technique at 532nm of laser excitation wavelength is used to determine magnitude and sign of the nonlinear refractive index (n2) and nonlinear absorption coefficient (β). The samples exhibited a self-focusing effect with a negative from the closed aperture z-scan analysis. The n2 is observed to be 10−8 cm2/W. Open z-scan data showed reverse saturable absorptions with significant β for both samples. The magnitude of β is of the order of 10−4 cm/W. Optical limiting studies show a decrement in transmittance as a function of input fluence. Optical limiting action begins at as low as 20 kW/cm2 of focal input intensity which is ideal for low powered continuous wave laser limiting applications. From the third-order nonlinear properties results, the compound is recommended for optoelectronic and photonics application.