Experimental observation of enhanced reverse saturable absorption in Bi2Se3 nanoplates doped PMMA thin film. (1st November 2022)

• Record Type: Journal Article
• Authors: Mondal, Partha; Choubey, Priyanka; Gupta, Anu; Wan, Meher; Massoud, Yehia
• Is Part Of: Materials research express. Volume 9:Number 11(2022)
• Publication Date: 2022-11-01
• Subjects: nonlinear optics -- integrated Photonics -- Z-scan technique; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac9d82
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: By employing the ultrafast Z-scan technique, we characterize the nonlinear absorption property of PMMA/Bismuth Selenide ( Bi 2 Se 3 ) composite with varying concentrations. We report the fabrication of bismuth selenide ( Bi 2 Se 3 ) nanoplate (topological insulator (TI)) doped poly methyl methacrylate (PMMA) thin film with varying doping concentrations. The effect of Bi 2 Se 3 on structural and linear properties of PMMA thin film has been investigated through UV-Vis spectroscopy, scanning electron microscope (SEM), and Energy dispersive x-ray spectroscopy (EDS) elemental mapping techniques. Furthermore, the nonlinear optical absorption property of PMMA and PMMA/ Bi 2 Se 3 composites have been performed employing a single beam open aperture z-scan technique under femtosecond laser excitation at 750 nm. The z-scan results exhibit an enhancement of reverse saturable absorption (RSA) property with an increased nonlinear absorption coefficient ( β ) of the PMMA/ Bi 2 Se 3 composites compared to pure PMMA measured with intensity at 320 GW cm −2 . The RSA response gets enhanced with the increase in doping concentration also. Our experimental observations reveal that PMMA/ Bi 2 Se 3 composite can provide a promising platform to realize photonic devices such as optical limiters, optical switches, and efficient protectors from high power sources.