Size Dependent Nonlinear Optical Properties of YCrO3 Nanosystems

Abstract

We report size-dependent optical limiting response of YCrO3 nanosystems upon illumination by nanosecond laser pulses at 532 nm. The limiting properties were investigated using the open aperture z-scan technique. Three-photon absorption coefficient is found to increase with particle size within the range of our investigations. We propose that the obtained nonlinearity is caused by two photon absorption, followed by excited state absorption.