A1 Refereed original research article in a scientific journal

Enhanced optical nonlinearity in beta-MnO2 nanowire network decorated with Ag nanoparticles




AuthorsKumar Manish, Perumbilavil Sreekanth, Goel Alok, Philip Reji

PublisherElsevier

Publication year2021

JournalOptical Materials

Journal name in sourceOPTICAL MATERIALS

Journal acronymOPT MATER

Article numberARTN 111226

Volume118

Number of pages6

ISSN0925-3467

DOIhttps://doi.org/10.1016/j.optmat.2021.111226


Abstract
We report on enhanced nonlinear optical absorption and optical limiting in beta-MnO2 sponge-like nanowire network decorated with Ag nanoparticles excited by nanosecond laser. A simple two-step process is used to prepare the samples. The structure, morphology and the elemental analysis of the prepared samples are studied using x-ray diffraction, field emission scanning electron microscopy and energy-dispersive x-ray spectroscopy. Nonlinear optical absorption properties of the samples in solution is studied using the open aperture Z-scan technique employing 5 ns laser pulses at 532 nm. Nonlinear transmission measurements show that beta-MnO2 exhibit weak saturable absorption at low fluence and large optical limiting at high fluence, while upon decoration with Ag particles, Ag/beta-MnO2 shows strong saturable absorption at low fluence and enhanced optical limiting at higher fluence with an optical limiting threshold value three times lower than that of bare beta-MnO2 nanowires. The results indicate that these materials are potentially useful for constructing saturable absorbers and optical limiters.



Last updated on 2024-26-11 at 18:37