Sindhu, H S and Maidur, Shivaraj R and Patil, Parutagouda Shankaragouda and Choudhary, R J and Rajendra, B V (2019) Nonlinear optical and optical power limiting studies of Zn1-xMnxO thin films prepared by spray pyrolysis. Optik - International Journal for Light and Electron, 182 (1). pp. 671-680. ISSN 0030-4026

PDF 6448.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy

Abstract

Zn1-xMnxO (x=0, 0.02, 0.04, 0.06, 0.08 and 0.1) thin films were deposited at 723 K temperature on glass substrate using a solution of molarity of 0.0125M through spray pyrolysis method. X-ray diffractogram (XRD) analysis confirmed that all the films have (0 0 2) as a preferential orientation with hexagonal wurtzite structure. The increase of dopant marginally changed the crystallite size and lattice parameters. Surface morphology changes fibrous to spherical structure with an increase in doping. X-ray photoelectron spectroscope (XPS) measurements proved the occurrence of manganese is in the Mn2+ transition state along with Oxygen and Zinc content. The films showed ˜90-80% transmittance in the visible region with increasing in Mn concentration. The energy band-gap reduced with increase in dopant, due to sp-d exchange interactions. The nonlinear optical (NLO) properties were studied using z-scan technique under continuous wave (CW) diode pumped solid-state (DPSS) laser operating at 532 nm wavelength. Reverse saturable absorption (RSA) behaviors observed in both undoped and Mn doped films which is attributed to two-photon absorption (TPA) process. The optical limiting properties were also studied, which suggests that the prepared thin films could be used as optical limiters in the visible region

Actions (login required)

View Item